There is no support for this right now. However, as you say, the OKI/Dialogic 24kbps format is very widely used in the IVR business. It might be worth having a 6k -> 8K rate converter so the existing Dialogic 32kbps code can also work with 24kbps Dialogic files.I found some posts regarding this issue dating of September 2003, but no real answer.
The ADPCM format supported by Asterisk (the .vox files) is 4-bit, 8 kHz. I need 4-bit, 6 kHz, which is also a widespread Dialogic format, to help migration.
Is there an existing format/codec for this? If not, can I make myself a shared object in /usr/lib/asterisk/modules? Is this easy??? :-(
Thanks,
Yves Chouinard
Vox-Tel
P.S. Just saying 4-bit, 8 kHz or 4-bit, 6 kHz is meaningless. There are *many* ADPCM formats which fit those descriptions. The format is OKI ADPCM. Dialogic originally used OKI's ADPCM chips, although all recent cards implement the codec in a programmable DSP.
Regards, Steve
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