The macro AUDIO_BUFFER_SIZE is changeable which up to you. But is should within a reasonable range as DSP core speed is limited.
in head file of MultiCoreTalkThruSharcSharc_Core1.h, you can find its defination.
/* Macro to set buffer size */
#define AUDIO_BUFFER_SIZE (SAMPLES_PER_PERIOD * NUM_CHANNELS * SAMPLE_SIZE)
so it's better to change the samples per peroid or number of channels or sample size.
Don't just modify AUDIO_BUFFER_SIZE directly.
Hope it helps.
How can I know the range of the AUDIO_BUFFER_SIZE or can I define the size by myself and the EE-383 still work well.