That's an interesting module. I used the Microchip ADPCM encoder at
44.1kHz to do this: http://www.uslinc.com:8083/ . The audio is digitized
with an AK7757 DSP where equalization and audio compression are done. The
audio comes out of it as 32 bit I2S (only 16 msb used). That drives an SPI
port on a PIC32 where it goes into a DMA ping pong buffer. When I get a
DMA interrupt, I convert that buffer to ADPCM and hold hit for a request
from the HTTP2 server. ADPCM can sound reasonable, and it's simle!

Harold


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