I have recently being using a PIC18F46K20-E/PPIC18F46K20-E/P to play back audio samples from an external EEPROM using the SPI module
to retrieve the data etc and play audio via the internal PWM module. Here's the question, I need to play back up to four samples
simultaneously ( polyphonic), which is the best technique for polyphonic playback? maybe alternate samples fed to the PWM
in order so that the ear integrates the samples, or maybe 'mixing' the sample data in the digital domain and feeding the summed
data to the PWM? any thoughts?
Carl
