Abstract:
A control system for a compact disc jukebox detects skips in the compact disc by reading an apparent elapsed time signal from the compact disc that is encoded on the compact disc. A timer is simultaneously started and outputs a real elapsed time signal. A comparison is made between the real elapsed time signal and the apparent elapsed time signal. If the difference between these two signals exceeds a predetermined amount of time, a skip is recorded. The detection of a skip may be recorded as to a particular selection on a particular CD, along with the time of the skip. Appropriate action may be taken in response to the recording of a skip, such as cancelling the selection or stopping the CD.

Description:
FIELD OF THE INVENTION  
         [0001]    The invention is the in the field of money-operated phonographs and more specifically in the field of control systems for phonographs which play compact discs.  
         BACKGROUND OF THE INVENTION  
         [0002]    There have long been known in the prior art money responsive automatic phonographs commonly known as “jukeboxes.” These devices of the prior art normally play selections from 45 rpm records which, in response to the deposit of money and to making of a selection by use of a keyboard or the like, extract the record carrying the desired selection from a magazine and place it with the proper side up on the player turntable.  
           [0003]    Control systems for automatic phonographs of the type described hereinabove incorporate a number of auxiliary features. They include various accounting features which record the amount of money which has been deposited in the machine, the number of times each selection has been made and the like. By use of this information, arrangements have been provided whereby the customer may operate a particular button to play the most popular selection, for example.  
           [0004]    In addition to the most popular selection, some jukeboxes of the prior art incorporate a feature by virtue of which a selection is automatically played after a predetermined idle period. A manually operable switch may be provided to permit the machine to be set for a period of free play during which no money need to be deposited in order to make a selection.  
           [0005]    There have recently come into widespread use phonographs which incorporate lasers for reading music coded on a disc in digital form. While these compact discs are very rugged devices, sometimes they develop problems similar to those which may be encountered in vinyl records. Skips and dropouts are not uncommon CD faults. Sometimes the CD player may not be able to read the disc at all. Control systems of the type discussed hereinabove make no provision for cancelling a selection in the event that the record incorporates a major defect. Neither do they provide any means for recording such defects for later review to permit defective records or discs to be replaced.  
         SUMMARY OF THE INVENTION  
         [0006]    One object of our invention is to provide an automatic phonograph control system which is more sophisticated than are control systems of the prior art.  
           [0007]    Another object of our invention is to provide an automatic phonograph control system which is especially adapted for use with a CD player.  
           [0008]    A further object of our invention is to provide an automatic phonograph control system which automatically cancels a selection after a predetermined number of skips.  
           [0009]    Still another object of our invention is to provide an automatic phonograph control system which automatically cancels a selection after a predetermined maximum skip time has elapsed.  
           [0010]    Still another object of our invention is to provide an automatic phonograph control system which records all skips and cancellations for later review.  
           [0011]    A still further object of our invention is to provide an automatic phonograph control system having an autoplay feature which can be set for days of the week, hours of the day, intervals between autoplays and selected or random autoplays.  
           [0012]    Yet another object of our invention is to provide an automatic phonograph control system which has a free play feature which can be set for the days of the week and times of the days.  
           [0013]    An additional object of our invention is to provide an automatic phonograph control system which can be set to clear unplayed selections after a period of time following turnoff of the phonograph.  
           [0014]    Yet another object of our invention is to provide an automatic phonograph control system which affords a most popular selection display of particular tracks of a CD disc. 
       
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS  
       [0015]    In the accompanying drawings to which reference is made in the instant specification and which are to be read in conjunction therewith and in which like reference characters are used to designate the same parts in the various views:  
         [0016]    [0016]FIG. 1 is a front elevation of a CD automatic phonograph which is provided with our control system.  
         [0017]    [0017]FIG. 2 is a plan view of the keyboard of the phonograph shown in FIG. 1.  
         [0018]    [0018]FIG. 3 is a block diagram of our control system for a CD automatic phonograph.  
         [0019]    [0019]FIG. 4 is a schematic view of the title display, digital display and keyboard position of the control system of FIG. 1.  
         [0020]    [0020]FIG. 5 is a schematic view of a portion of the central control computer of our control system.  
         [0021]    [0021]FIG. 6 is a schematic view of the remainder of the central control computer of our automatic phonograph control system.  
         [0022]    [0022]FIG. 7 is a schematic view of a portion of the mechanism control section of our control system.  
         [0023]    [0023]FIG. 8 is a schematic view of the remainder of the mechanism control section of our control system.  
         [0024]    [0024]FIG. 9 is a flow diagram illustrating the operation of our system in determining skips or defects in the discs. 
     
    
     DESCRIPTION OF THE PREFERRED EMBODIMENTS  
       [0025]    Referring now to FIGS. 1 and 2, an automatic phonograph indicated generally by the reference character  10  which may be provided with our control system includes a cabinet  12 , the front of which is provided with a coin slot  14  and a bill insertion slot  16 .  
         [0026]    A title page display area indicated generally by the reference character  18  located in a recess  20  in the front of the cabinet behind a window  22  receives respective page assemblies  24  and  26 . Each of these page assemblies includes a plurality of panels  28 . Each panel  28  except the outermost panels comprises two pages on the opposite sides thereof. Each page is adapted to receive three CD jackets  30 ,  32 , and  34 , each of which includes pictorial matter  36  as well as an alphanumeric descriptive material  38 . Copending application of Herring et al Ser. No. ______ filed ______ discloses the page turning mechanism and the portion of the automatic phonograph control system relating thereto.  
         [0027]    The front of the cabinet  12  also receives a keyboard or pushbutton array indicated generally by the reference character  44  as well as a display area indicated generally by the reference character  46 , which is adapted to show the selection playing, the selection being made, the selections remaining, as well as the service mode display which will be described more fully hereinbelow.  
         [0028]    The pushbutton or keyboard assembly includes respective pushbuttons  40  and  42  adapted to be pushed by a potential customer to change the display by moving the pages of the sets  24  and  26  inwardly or outwardly.  
         [0029]    The assembly  44  also includes a plurality of numerical pushbuttons  152   a  through  152   j  corresponding to the “0” and to the digits  1  to  9  respectively. A reset button  156  and a popular button  154  complete the assembly.  
         [0030]    Referring now to FIG. 3, which is a block diagram of the control system for our title display, the control system includes a keyboard indicated by the block  120 , adapted to input information to a digital display system  122 . This digital display unit  122  feeds information to and receives information from the title page display unit  124 .  
         [0031]    A coin mechanism  126 , which may for example be responsive to nickels, dimes, quarters and half-dollars, provides monetary input information to the central control computer  130  of the control system.  
         [0032]    A bill acceptor  128  which ma, for example, accept $1 and $5 bills, provides corresponding credit information to the central control computer  130 . As is known in the art, the central control computer  130  accumulates credit information from the coin mechanism  126  and the bill acceptor  128  from which credit is subtracted as selections are played.  
         [0033]    The digital display unit  122  provides certain input information to the control computer and receives information therefrom from which it provides various displays, such for example as the selection being played and other information, as will be described more fully hereinbelow.  
         [0034]    The central control computer  130  has associated therewith a cancel switch  132 , which may be actuated to cancel a selection, as well as an internally accessible service switch  134  which may be closed to place the unit in a service mode for reasons which will be described more fully hereinbelow.  
         [0035]    The central control computer  130  provides the necessary inputs to the mechanism control section  136  of the control system to cause the jukebox to operate in the intended manner. The mechanism control section communicates with the compact disc player  138  including the laser mechanism and CD decoder over lines  140  and  142 .  
         [0036]    In addition to communicating with the unit  138 , the mechanism control section provides the required signals for other various units of the machine, such for example as the play counter  144 , the money counter  146 , the transfer motor  148  and the magazine motor  150 .  
         [0037]    Referring now to FIG. 4, the keyboard assembly  120  which is indicated generally by the reference character  44  in FIG. 1, includes a pushbutton switch  40  adapted to be operated to cause the tile pages to flip outwardly and a pushbutton switch  42  adapted to be operated to cause the pages to flip inwardly. In addition, the keyboard  120  includes numeric pushbuttons  152   a  through  152   j  which are operated to make selections in the normal operational mode of the machine and which are operated in predetermined sequences in the service mode of the machine. A “most popular” selection switch  154  and a reset switch  156  complete the switches of the keyboard  120 . In the service mode, a pair of switches  158  and  160  internal to the jukebox may be operated to cause the titles to move inwardly or outwardly.  
         [0038]    The title display unit  124  includes the drive motor  88 , the indexing switch  108 , and the limit switch  110 .  
         [0039]    Associated with the title display page unit  124  and indicated as a part of the digital display unit  122 , is a motor driver  162  which may for example be a Sprague Electric UDN 2953B. As will be explained more fully hereinbelow, in operation of the system the control circuitry knows the present location and direction of drive of the display system so that proper control is achieved.  
         [0040]    The visual display unit  164  may for example be a vacuum fluorescent display of any type known to the art which is adapted to provide the extent of display required. Associated with the unit  164 , is a display driver  166  which may be a Rockwell International 10937P. A dual receiver  168  which may be a National Semiconductor DS88C20 couples the display data to the driver  166  which, in a manner known to the art, actuates the display unit to provide the visible display. We have indicated the nature of the couplings between the digital display section  122  and the central computer  130  to the right in FIG. 4.  
         [0041]    Referring now to FIGS. 4 and 6, we have indicated the connection between the digital display section  122  and the central control computer  130  in the following manner. The channels indicated by the reference characters  170   a  and  170   b  and  170   c  and  170   d  correspond to the DISPLAY TX DATA and DISPLAY CLOCK and lead to a terminal element  172  of FIG. 6. A first group of conductors corresponding respectively to the logic common, the +8 volt DC line, the +28 volt DC line and the power common, as well as a group of conductors  176   a  to  176   d , corresponding to the keyboard returns  0  through  3 , are coupled to a terminal element  178  of FIG. 6 in the order shown. Conductor  180   a  through  180   h  which carry respective strobes  1  to  5  and  8  to  10  lead to a terminal element  182  of FIG. 6. Conductors  184   a  through  184   e  which correspond to the  0  strobe for the coin switch, as well as the coin switch returns  0  to  3  are connected to a terminal element  186  of FIG. 6.  
         [0042]    Referring now to FIGS. 5 and 6, the central control computer  130  includes a microprocessor  188  which may for example be a Hitachi 64180. The address output ports A 0  through A 7  of the microprocessor  188  are coupled to a driver  190  leading to an address bus  192  of the system. Similarly, the output ports A 8  through A 15  of the microprocessor  188  provide inputs to a second driver  194  which also supplies the address bus  192 . Drivers  190  and  194  may, for example, be 74HCT244 drivers. The address bus  192  provides input data for an EPROM  196  such as a 27512 and a RAM  198  such as 6264. A third driver  200  which may also be a 74HCT244 provides two more address bits as well as command signals to a memory decoding matrix  202  which may be, for example, a 72421.  
         [0043]    As is known in the art, in response to actuation the EPROM and the RAM are adapted to put out data on a data bus  206 . Another driver  208  which may be a 74HCT245 couples the data bus  206  to the D 0  to D 7  terminals of the microprocessor  188 . Data bus  206  is coupled to the D 0  to D 7  inputs of each of a pair of flip-flops  208  and  210  shown in FIG. 6, which flip-flops may, for example, be 74LS374 flip-flops. We also couple the data bus  206  to the terminals  1 Y 1  to  1 Y 4  and  2 Y 1  to  2 Y 4  of a buffer  212  which may be a 74HC244. A conductor  214  connects the OUT SEL  1  to the clock input terminal of the flip-flop  208  which provides output strobes  8  to  10  leading to the terminal  182 .  
         [0044]    Another conductor  216  connects the OUT SEL  0  of the decoder  202  to the clock input terminal of the flip-flop  210  which provides strobes  0  through  7  associated with the terminal  182 .  
         [0045]    A conductor  218  connects the IN SEL terminal of the decoder  202  to the buffer  212  which is associated with terminals  178  and  186 .  
         [0046]    Respective conductors  222 ,  224  and  226  connect the TXS RXS and CKS ports of the microprocessor  188  to the D 11 , D 12  and R 01  inputs of the circuit component  228  which may, for example, be a DS8923 associated with the terminal  172  to control the title page display. A conductor  230  connects the  202  terminal of the component  212  to the R 02  input of the component  228  to cause the display to operate in the “Attention” mode.  
         [0047]    Compact disc player  138  which is incorporated in our phonograph may be of any suitable type known to the art. For example, it may be a Phillips CDM 3  laser mechanism and decoder board. It incorporates the laser mechanism for reading the disc and a decoder and servoprocessor which communicates with the mechanism control  136  over a two wire serial bus identified by the reference characters  140  and  142 . This bus carries the CDM START and CDM STOP signals as well as the CD DATA.  
         [0048]    Referring now to FIGS. 7 and 8, the mechanism control assembly, including the servoprocessor communication and system communication portions has a microprocessor  232 . As is known in the art, the unit  138  puts out a CDM START signal which is fed to a line  234 . We apply this signal to the Q input terminal of a dual J-K flip-flop  236 . Similarly, the unit  138  puts out a CDM STOP signal which is fed a line  238  which we apply to the Q terminal of a second JK flip-flop  240 . We apply the clock signal on line  242  to the CLK terminals of a second pair of JK flip-flops  244  and  246 . Terminal  248  couples the SCL line  140  to the common terminal of a pair of voltage dividing resistors  250  and  252  connected between a terminal  254  of +5 volts DC and the output of a buffer  256 , the input of which is connected to logic ground and the control terminal of which is connected to the Q input of flip-flop  244 . Flip-flops  236 ,  240 ,  244  and  246  may be of any suitable type such as 74HCT73.  
         [0049]    Terminal  248  also connects the SDA line  142  to a common terminal of a pair of voltage dividing resistors  258  and  260  connected between terminal  254  and the input of a buffer  262 , the output of which is connected to the common JK terminals of flip-flop  246  and to a CDM DATA line  264 . We connect the control input terminal of buffer  262  to logic ground. Buffer  268 , the control terminal of which is connected to logic ground, couples the output of buffer  250  to the clock line  242 . A two-input NAND circuit  270 , the inputs of which are tied together, connects the output of buffer  266  to the CLK terminal of flip-flop  240 .  
         [0050]    A CDM BIT TRAPPED line  272  connects the Q output of flip-flop  244  to the port P 11  of microprocessor  232 . A CDM DATA RX line  274  connects the Q output of flip-flop  246  to port P 10  of the microprocessor  152 . We connect a CDM DATA TX line  276  to the inhibit input terminal of a buffer  278 , the input of which is connected to logic ground and the output of which is connected to the input of buffer  262 .  
         [0051]    IIC EN line  280  connects port P 20  of the microprocessor  232  to CL input terminals of flip-flops  236 ,  240 ,  244  and  246 .  
         [0052]    Terminal  248  connects an RC 5  line  282  to the common input terminals of a two input NAND circuit  284 , the output of which is connected to the common input terminals of a second two input NAND circuit  286  to provide the RC 5  signal on line  288 .  
         [0053]    A transceiver  290  which may be a 75176, for example, couples terminals  292  and  294  to line  296  carrying a SYSTEM Tx/Rx signal, line  298  providing a SYSTEM Rx signal and line  300  carrying a SYSTEM Tx signal.  
         [0054]    Lines  242 ,  264  and  288  provide the D 0  to D 2  input to an eight input DATA SEL component  302 . A route electing DIP switch array  304  provides the D 5  to D 7  inputs to component  302 . The Y output and, A, B, C inputs of component  302  are connected respectively to ports P 13 , P 15 , P 16  and P 17  of the microprocessor  232 .  
         [0055]    Apparatus for handling the discs and for moving them from the supply magazine to the disc player will not be described in detail since this apparatus per se forms no part of our invention. This mechanism, however, does put out disc hold down signal on line  306 , a cancel signal on line  308 , an outer cam signal  310 , an inner cam signal on line  312 , an index signal on line  314  and a home signal on line  316 . The signals just described provide the D 0  to D 5  inputs to another eight input DATA SEL circuit  318 , and the Y outputs A, B, C, inputs of which respectively are connected to ports P 12 , P 15 , P 16  and P 17  of the microprocessor  232 .  
         [0056]    Ports A 0 /D 0  to A 7 /D 7  of the microprocessor  232  supply a data bus  320 . Ports AB through A 15  supply an address bus  322 .  
         [0057]    In addition to the signals described hereinabove, the operating parts of the jukebox and its auxiliary equipment provide a money counter signal on line  324 , a play counter signal on line  328 , a magazine motor signal on line  330 , a transport motor signal on line  322  and a detent solenoid signal on line  334 . These signals provide the Q 0  to Q 7  inputs to an octal edge triggered flip-flop  336  which may, for example, be a 74LS374. Ports D 0  through D 7  of the component  336  are coupled to the data bus  320 .  
         [0058]    An octal D-type buffer  338  has its ports D 0  to D 7  connected to the data bus  320 . Ports Q 0  through Q 7  of component  338  provide address bits A 0  to A 7  on the address bus  322 . It will be remembered that bits A 8  through A 15  for the address bus  322  come from the microprocessor  232 .  
         [0059]    An EPROM  340  responsive to address bits AO to A 14  provides outputs O 0  to O 7  on the data bus  320 .  
         [0060]    A RAM  342  responsive to address bits AO to A 12  has input output ports  1 /O 0  to  1 /O 7  connected to the data bus  320 .  
         [0061]    A line  344  connects the AS port of the microprocessor  152  to the G port of the buffer  338 . Inverter  346  couples the R/W  347  line of microprocessor  232  to the DE port of the EPROM  340 . A pair of series connected inverters  348  and  350  connect the E port line  352  of microprocessor  232  to one input terminal of a two-input NAND circuit  354 , the other input of which is address bit A 15 . The output of component  354  is connected to a CE input of EPROM  340 . A 3-to-8 line decoder  356  which may be a 74HCT138 is responsive to address bits A 13  to A 15  to provide outputs Y 0  to Y 7 . An inverter  358  couples output line Y 1  of decoder  356  to one input terminal of the two-input NAND circuit  360 , the other input of which is supplied by inverter  350 . We connect the output of component  360  to the CS port of the RAM  342 . A NAND circuit  362 , one input of which is provided by inverter  346  and the other input to which is provided by line  352 , has an output which is coupled to the WE input port of RAM  342 . Inverter  364  couples the Y 2  terminal of component  356  to one input of a two input NAND circuit  366 , the other input to which is provided by line  352 . Circuit  366  provides the clock CLK input to component  336 .  
         [0062]    As is known in the art, in making a compact disc in the recording studio an original analog sound input wave form is sampled at regular intervals. The measured values are then converted into a series of binary numbers in a quantization step by means of an analog to digital converter. These numbers are encoded into a pulse train, multiplexed and the Cross-Interleaved Reed-Solomon code is added. Then the compact disc subcode is inserted to make it easy to find and to program information. The subcode tells how many tracks are on the disc, as well as the start time, the ending time and the elapsed time of each track. The elapsed time indicates what point on the disc is “currently being read.” 
         [0063]    Real time clock  204  of the central control computer  130  provides information indicting the day of the week as well as the time of day in the manner of a 24 hour clock. That is to say, an output indicating  0200  is 2 a.m. while an indication of  1400  is 2 p.m. In our arrangement we begin to count using the timer interrupt in device  232  in response to the selection start time indication from the decoder of the unit  138 . This interrupt elapsed time is compared with an elapsed time indication from unit  138 . If they differ by more than plus or minus one second an indication is given that the disk has “skipped.” Explained more fully, the CD is not read in real time. The laser picks up the musical information in digital form together with subcode information. This digital information is stored and then converted to analog for playing. In determining skips, the mechanism control assembly asks the Philips decoder where it is in the course of playing a selection. If it says we are at 8 and, on the basis of the interrupt elapsed time determined from the unit  232 , it should be at 5, a skip is indicated. Similarly, if at a later time it says it is at 9, whereas it should be at 11, that is recorded as a second skip The general mode of communication between a keyboard processor such as that employed in our automatic phonograph and the servoprocessor forming part of the unit  138  is known in the art, it will n be dibed in detail. In general, communication is by means of a set of high level commands which the servoprocessor translates into procedures and signals for the servo system and decoder and reports its state to the keyboard processor. The servoprocessor stores the subcode data from the decoder and when not busy controlling the pickup, the processor transmits the subcode to the keyboard processor.  
         [0064]    Referring now to FIG. 9, we have shown a flow chart illustrating the operation of our control system in detecting skips and in using and displaying the resultant information. When a selection is made to the disc carrying the selection in one of its tracks first is transferred to the player from the storage magazine. The disc is spun up, the table of contents is read by the decoder. The mechanism control assembly requests this table of content (TOC) data from the player. Next it issues a command to the player to play the selected track. The status code of the player is read and the one millisecond timer is synchronized with the player reported time. When the synchronization has been achieved, the status code is continually read from the player. A determination is made of whether or not the elapsed time recorded by the player differs from the interrupt elapsed time by more than one second. If the answer to this question is no, the system continues to make a comparison of the reported elapsed time with the interrupt elapsed time until the selection is over. When the selection is over, a stop command is issued to the player and the system continues in its normal mode of operation.  
         [0065]    If the answer to the question of whether or not the reported elapsed time is different from the interrupt elapsed time by more than one second is yes, a determination next is made as to whether or not the skip time is equal to or greater than the set cancel time. If the answer to this question is yes, the error condition is reported to central control computer for logging and a stop command is issued to the player so that the selection is automatically cancelled and the system returns to its normal operation.  
         [0066]    If, following a determination that the reported elapsed time differs from the interrupt elapsed time by more than one second, a determination is made that the skip time is less than the set cancelled time. “1” is added to the skip counter and a determination is made of whether or not the skip count is equal to the set skip count. If it is, this condition is reported to the central control computer and a stop command is issued to the player to cancel this selection. If the skip count is not yet equal to the set skip count, the interrupt timer is resynchronized and the system returns to the question of whether or not an elapsed time reported by the player is different from the interrupt elapsed time by more than one second.  
         [0067]    As is pointed out hereinabove, we provide our system with means for permitting the operator of the phonograph to view disc conditions which have theretofore been determined and logged. In order to do so, the operator closes the service switch  134  and the display  46  shows SERVICE MODE. When that has been done the digits 8 and 6 are typed in by actuating pushbuttons  152   i  and  152   g . The display  46  then shows DISC CONDITIONS. Popular button  154  is actuated. If there have been no conditions reported, a display  46  indicates this fact by showing NO CONDITIONS.  
         [0068]    If in fact there have been some conditions which have been logged, when the popular button  154  is operated a display will show SEL followed by a first two digit number which will be the disc number followed by a second two digit number which will be the track number. Also displayed will be the legend OCC followed by a two digit number indicating the number of occurrences. The operator then holds the reset button  156  while pushing the button  152   j  corresponding to the digit 9. When that has been done, the display carries the legend CANCEL followed by a two digit number indicating the number of seconds and the legend SKIP followed by a two digit number indicating the number of skips. Again pushing the reset button  156  and holding it, button  152   j  corresponding to the digit 9 is again pushed upon which the display  36  shows TIME followed by two two-digit numbers separated by a colon indicating the time of the last occurrence and a second display of two two-digit numbers separated by a slash indicating the date of the last occurrence by month and day.  
         [0069]    Holding the reset button  156  and pressing button  152   d  corresponding to the digit  3 , the next disc condition can be viewed. Holding the reset button  156  and pushing the button  152   c  corresponding to the digit  2 , the previous disc condition can be viewed. These steps are carried out as often as necessary to view the conditions of all the discs in the phonograph. Having viewed the conditions, the operator can of course clean or replace the discs as necessary.  
         [0070]    In connection with the disc number and track number display noted hereinabove, selections ending in 00 do not actually exist. If the display selection number ends in 00 it means that the CD layer could not correctly read the disc&#39;s table of contents. In such a case, it may be that the disc is installed backwards, is dirty, is a bad disc, is not initialized, or is absent.  
         [0071]    In the display immediately following the display of the disc and selection number, the number after the legend CANCL represents the total amount of time in which the selection was off when it was cancelled. For example, if 12 is reported the selections skip ahead or back by twelve seconds. The maximum skip time before cancellation can be set in the manner described hereinbelow.  
         [0072]    The second number reported after the SKIP legend is the number of times the disc skipped by more than one second. The limit of skips permitted may be set in a manner described hereinbelow. It would readily be appreciated that if a condition is reported because of this parameter, the number will always be the same as the programmed limit.  
         [0073]    The total permissible skip time before cancellation, as well as the total number of skips which are permitted before cancellation can be set during the initialization portion of the program. First, switch  134  is closed to place the apparatus in the service condition. Next, the buttons  152   d  and  152   g  corresponding to the digits  3  and  6  are pressed. When that has been done, the new number is typed and popular button  154  is actuated.  
         [0074]    In setting the cancel time with the control system in the service mode, buttons  152   d  and  152   h  are pressed. Next, the new number is typed in and the popular button  154  is pressed.  
         [0075]    The disc conditions which have been logged in the memory will remain therein until they are cleared in the following manner. With the control system in the service mode with the machine set so that it is in the service mode and the display shows SERVICE MODE, button  152   i  corresponding to the digit  8  is pushed and the display will indicate STATUS. Pushing button  152   h  corresponding to  7  will result in the display of CLEAR CONDITIONS. Next, the popular button  154  is pushed and the display of CLEAR CONDITIONS will blink and then reappear. In this way all of the disc conditions will have been removed from memory.  
         [0076]    As has been pointed out hereinabove, our system incorporates a number of other significant features in addition to that of detecting, recording and displaying disc conditions. One of these features is the option for clearing selections which remain to be played after a period of time during which the phonograph is off. The significance of this feature will readily be appreciated from the fact that at the time of closing of the establishment in which the phonograph is located, there may remain to be played a number of selections. The proprietor may well wish to have such selections cleared automatically after a period of time during which the phonograph is off. For example, a time of four hours may be selected. In our control system this option may be toggled on and off by holding the reset button  156  and actuating button  152   j  corresponding to the digit  9 . When the automatic clear option has been set to either the on or off condition, the change can be preserved by pushing the popular button  154 . It will readily be appreciated that these operations take place when the system is in the SERVICE mode.  
         [0077]    We also provide means for changing the time of the clear option to a different amount of time. This is achieved in the service mode of the system by actuating buttons  152   g ,  152   j  and  152   b  in sequence, typing in a new time and then operating the popular button  154 .  
         [0078]    The timed free play feature allows the operator to program specific days and times of day as free play time. This is achieved by comparing times set in the memory with the time indicated by the real time clock  204 . With the control system in the SERVICE mode, the timed free play may be turned on or off by actuating buttons  152   f  and  152   e  corresponding to the digits  5  and  4  sequentially. With the reset button  156  held, the button  152   j  can be pushed to turn the timed free play schedule on or off. After the schedule has been set on or off the popular button  154  is pressed to preserve the change.  
         [0079]    By pushing button  152   f  twice, holding the reset button  156  and pushing button  152   j , the free play can be turned off immediately without waiting for the start or stop time. Pushing popular button  154  saves the change.  
         [0080]    In order to set the free play scheduled start time of day buttons,  152   f  and  152   g  corresponding to digits  5  and  6  are pressed in sequence. Next, the time of day is entered in 24 hour playout. To set the stop time, buttons  152   s    152   h  are pressed in sequence and again the time is entered in  24  hour format.  
         [0081]    The days of the week on which the free play feature will turn on can be set by operating buttons  152   f  and  152   i  sequentially. Then, the reset button  156  is held and either button  152   c  or  152   d  is pushed to move from day to day. The display will show SMTWTFS and the representation of the day currently selected will blink. Under these conditions, by holding the reset button  156  and pushing button  152   j , the day selected is turned on or off. Popular button  154  is pushed to preserve any selections which have been made.  
         [0082]    Specifically, if the operator of the machine wishes to have free play on from 5 p.m. to 6 p.m. on Mondays, Wednesdays and Fridays, the following sequence of operations is performed. The timed free play is set to on. The free play status is set to off. Start time is set at 17:00 and stop time set to 18:00 and the on days are set to MWF. As has been pointed out hereinabove, the free play status will turn on when the start time matches the hour output of the reel time clock  204  and the day of the week matches the clock day. The free play status will be turned off when the set stop time matches the output of the real time clock  204 .  
         [0083]    In addition to the features described hereinabove, our control system permits AUTOPLAY to be set automatically for four different days and for the times of day, as well as the selections in time between selections. In order to set the various AUTOPLAY parameters, button  152   e  corresponding to the digit  4  first is pressed. If the button  152   a  corresponding to “0” next is actuated, the AUTOPLAY can be set either on or off by holding the reset button  156  and pushing button  152   j  to toggle between the two options. Pushing the popular button  154  sets the option.  
         [0084]    In order to set the delay time between AUTOPLAY selections, buttons  152   e  and  152   b  are pushed in sequence. The number of minutes desired between autoplays is then typed in and the popular button  154  is actuated.  
         [0085]    The time of day that autoplay is allowed to begin is set by sequentially pushing buttons  152   e  and  152   c . Next, the hour in the 24 hour format is entered. This is achieved by typing the hour and actuating the popular button  154  and then setting the minute and pressing the popular button  154  again.  
         [0086]    Stop time for the autoplay is set in a manner similar to start time by first actuating buttons  152   e  and  152   d  sequentially and then setting in the time in 24 hour format.  
         [0087]    To set the days of the week when autoplay can operate, button  152   e  is pressed twice. When that has been done, the reset button  156  is held and either button  152   c  or  152   d  is actuated to move from day to day. The display shows SMTWTFS and the day currently selected blinks. By holding the reset button  156  and pushing button  152   j , the day can be turned on or off. Again, the popular button  154  is actuated to save changes.  
         [0088]    The individual selections which will be played in the course of an autoplay operation, can be set by sequentially pushing buttons  152   e  and  152   f . When this has been done, the selections to be played are set.  
         [0089]    Sequential operation of buttons  152   e  and  152   g  clears all the program selections upon pushing of the popular button  154 .  
         [0090]    The autoplay status can be changed at once without waiting for the start or stop time of day by sequentially operating buttons  152   e  and  152   h  and then holding the reset button  156  and toggling on or off by operating button  152   j . The popular button  154  is operated to save the changes.  
         [0091]    It will readily be appreciated that the various autoplay conditions described hereinabove all are performed with the system in the SERVICE mode.  
         [0092]    Our system also permits of reading out the popularity of the various discs and selections. With the system set in the SERVICE mode, buttons  152   b  and  152   h  are pressed and the display shows the most popular disc number followed by the number of plays that disc had. The next most popular may be displayed by holding the reset button  156  and pressing button  152   d . In this manner, the display will show the discs in the order from most popular to least popular. By holding the reset button  156  and pushing button  152   c  the display will move upwardly through the popularity order toward the most popular. The popularity for any particular disc can be obtained by pressing the disc number.  
         [0093]    Conversely to the most popular display, our system provides a least popular disc display which is entered by sequentially pushing buttons  152   b  and  152   i  to display the least popular disc and the number of plays. By holding reset and pressing  2 , each successive least popular disc will be displayed. By holding the reset button  156  and pushing  152  d, the display moves up through the popularity display toward the least popular disc. Again, the popularity of a particular disc can be obtained by pushing the disc number.  
         [0094]    In addition to displaying the most popular and least popular discs, our system permits of displaying the most popular selection. This is achieved with the system in the SERVICE mode by sequentially pushing the buttons  152   b  and  152   j  so that the display shows a total of four digits indicating the selection, followed by the number of plays that selection had. By holding reset button  156  and pushing button  152   d , the system displays each successive most popular selection. Conversely, by pushing and holding the reset button  156  and pressing button  152   c , the display will move upwardly toward the most popular selection.  
         [0095]    It will be seen that we have accomplished the objects of our invention. We have provided an automatic phonograph control system which is more sophisticated than are control systems of the prior art. Our system is especially adapted for use with a CD player. Our system automatically cancels a selection after a predetermined number of skips. It likewise cancels a selection after a predetermined maximum skip time has elapsed. Our arrangement records all skips and cancellations for later review on the phonograph display. Our control arrangement includes an autoplay feature which can be set for days of the week, hours of the day, intervals between autoplays and selected or random autoplays. We have provided a free play feature which can be set for days of the week and times of the day. Our control automatically clears unplayed selections after a period of time during which the phonograph is off.  
         [0096]    It will be understood that certain features and subcombinations are of utility and may be employed without reference to other features and subcombinations. This is contemplated by and within the scope of our claims. It is further obvious that various changes may be made in details within the scope of our claims without departing from the spirit of our invention. It is, therefore, to be understood that our invention is not to be limited to the specific details shown and described.