Patent ID: 7851688

Claim:
A portable sound processing device [ 1000 ] adapted to retrofit a portable digital player (PDP) [ 1910 ] with pre-recorded sounds comprising: a) a first codec [ 1810 ] for receiving a PDP signal from said PDP [ 1910 ] playing the pre-recorded sounds; b) a storage device [ 1401 ] having stored pre-recorded sounds; c) a multiplexer device (MUX) [ 2010 ] coupled to the first codec and the storage device [ 1401 ] for selecting the PDP signal or a signal derived from the pre-recorded sounds on the storage device 1401 , and producing a MUX signal; d) a display [ 1201 ] for displaying information to a user; e) a plurality of input device [ 1100 ] for receiving input from the user; f) a second codec [ 1710 ] for receiving analog input from a musical instrument, converting it to a digital signal, and converting the final mixed digital output to an analog signal; g) at least one digital signal processor (DSP) [ 1610 ] coupled to MUX [ 2010 ] for receiving the MUX signal and for receiving the instrument signal and for digitally processing these signals into a processed signal; h) a master controller unit coupled to the MUX, storage [ 1401 ], PDP [ 1910 ] and DSPs [ 1610 , 1620 ], the user controls [ 1100 ] and the display [ 1201 ], adapted to interactively: i. operate the display [ 1201 ] to indicate choices to a user; ii. receive input from the user controls [ 1401 ] indicating choices of the user; iii. operate the MUX [ 2010 ] to select a signal indicated by user input; iv. operate the DSPs [ 1610 , 1620 ] to perform a desired signal processing to signals provided to them and play the processed signal.