it's true of course that listening to music at home is a matter of personal preference and take now there is a man named smith he's a relaxed and drink in the beauty of it all type of listen and we hear another smith is of the movement i'm a conductor to school of listening looks like fun enjoy listening to music differently to almost every role music lover is in search of the same thing not truest most lifelike reproduction of the original music me could you tell us what hi fi is that's what i thought you said i tried why sure you bet certainly i can tell you what i find is what is it i've tried is sound reproduction from a reproduction i can you know of course that most people hear sounds within a frequency range of twenty to fifteen thousand cycles i do know i don't well you know there's a phenomenon sound is a wave in the air pulsing at a certain speed and these waves hit the ear drum and are turned into vibrations which the brain translates into what we call sound now the waves pulsing slower than twenty times  second and faster than fifteen thousand times per second are mostly missed by the human ear now these pulsations are referred to as cycles and are counted so many per second that's the number of cycles per second in a given sound i described as its frequency you read me not exactly with you but somewhere nearby all well you can see the high and low frequency cycles of sound in that motion picture film you're showing  watch while i sing a low note that was a low frequency sound as you can see now high frequency sound you yes well what would you say it takes to be a do it yourself hi fi enthusiasm like yourself god doesn't take much only money our thorough knowledge of electronics a lot of spare time your wife threatens to leave you but if you aren't real high by wild and there's one smith speaking there are others this minute for instance another do it yourself hi fi enthusiast oh no no no no not me i'm a component parts man of course stupid of me what do you mean i simply mean that i assembled my hi fi set from preassembled component unit speaker and amplifier record player and you think you can tell us what hi fi is oh yes yes of course you know that sound waves i know i know we're up to where the sound comes out of the record all well as the record plays the needle wiggles at the right number of cycles per second which a bit record now this creates electrical impulses which are then boosted by this applet fire and then pushed out through that speaker in the form of sound wave th i suppose is a bigger and better the speaker the higher the fi so to speak if you don't mind a bad pun well i don't mind the pun but you have to be careful read statements like that i said something wrong well i just don't want you to get the idea that merely by adding a big speaker to an ordinary record player or radio you get high fidelity all the components of a real hi fi system have to be of the same high quality and properly back i see what you me and i watch that from now on and tell me do you have to be an electronic genius with nothing but spare time for this kind of hi fi oh no don't know i simply buy th and there's still another smiths opinion on the subject of hi fi are there more at least one this man seems to be enjoying all the advantages o true hi fi easy way what you call yourself a component parts man do it yourself want no i'm strictly and enjoy it myself i five enthusiast a stereotype a play the sound here is been recorded on the tape magnetically but mind you this stereophonic tape player is not just ordinary hi fi it isn't no sir this is hi fi but this is a new dimension and sound this is this is what i want to hear already r k but when i push the button on the tape you don't have to turn off the projector if you got there when i see you turn on the tape by the end of the projector right now that was a great a sensational to rather think what is it i told you stereophonic sound a new dimension and sound dad saying that and tell me what our well it's fairly simple i have heard that before too well you know the natural sound is received through our two ears from all directions so when you sit in a concert hall you hear the music not only from directly ahead but from both sides the head and below but because one ear is usually a little farther from any one sound than the other you don't quite hear the same sound at the same time in both ears that you can determine direction and that's what happens with the two speaker system errors but be careful don't get the idea that two speakers on an ordinary high fives that will give you the stereophonic sound they want you see stereophonic sound for the home is recorded on two separate tracks each one giving special emphasis to certain sections of the orchestra as heard from those positions now when played back simultaneously on two separate systems the sounds are blended together to achieve a new dimension and sound impossible to obtain and i'm on our recording my dime able to use the speaker on my regular hi fi because the manufacturer has made provision for the sound of the future you get the idea oh yeah as i've got it but i want you to explain it to me it's really very simple now let's not styles that again you remember when these were a standard equipment in every parlor if you're a stereos a ray of light stereos go stereophonic ride that's where the name comes from because the visual principle involved here has been applied to sound the only difference between these two pictures is that they were photographed by camera set slightly apart about as far apart as the distance between ones to live and when seen through the viewer the two blend together to create an illusion of depth and wit you see what i mean oh as i've got it down in stereophonic recording the same principle as used to separate groups of microphones are placed from eight to twenty feet apart and each group records on a separate track i'm with you now the separate soundtracks play over separate speaker systems correct and when our listeners are centrally located in front of the two speaker systems they get the illusion of sound coming from a wide area as  orchestra were in the room sounded great but it was going to vote a full orchestra in the living room or even a reasonable facsimile you get nearly everyone can they're amazingly inexpensive and new and more exciting  really in the grand canyon wait a minute i can do a few tricks to you know you let me hear the grand canyon and let you see it it's a d l and you read a letter go