PCM Encoder 0.01

Note: the sample length to be passed to the player in the DE register is stored by the encoder in the first 2 bytes of the encoded data, thus the address of the encoded data to be passed in HL is two bytes later than the actual data start.
This is the player

;-------------------------------------
; Plays one sample
; IN   HL - Encoded sample start address
;      DE - Sample length (#pcm samples)
;-------------------------------------
PLAY_SAMPLE:

This is the snippet of how to call it

        ld  hl, SAMPLE_START + 2
        ld  de, (SAMPLE_START)
        call PLAY_SAMPLE
     
[...]

;-------------------------------------
; Sample data
;-------------------------------------
SAMPLE_START:
        incbin "sample.bin"
SAMPLE_END: