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I think I had a breakthrough when I stopped trying to decode it into linear PCM and let it output a-law or u-law... If you zoom in in Audacity, it looks like audio now -- rational stops and starts,...

I've found code for an early version of g.723 with a patch for 16-kbit data rates. This could be what ADPCM16 means -- the unformalized version before it became G726... Also seen references to...

It might be G.727, which is a minor variation on G.726

It must be the wrong codec... The manual for that program doesn't even mention the 24 kilobit codec.

I don't really know. I'm not 100% certain this is even the right protocol yet. G.722 is also possible, [edit] or G.722.1, which has a 16-kilobit version -- or maybe something I haven't found yet. ...

This gets me something:

cat ~/input.raw |
./decode-g72x -3 -R -l |
sox -r 8000 -b 16 -c 1 -e signed-integer -t raw - -t wav ~/input.wav

It sounds like a badly tuned radio,...

ffmpeg supports g.726 but it requires a header -- raw won't do. So that's no help.

Someone wrote a headerless g.72x to WAV converter:
...

Thank you.

They may use AUD or NMF.

NICE has published a media player (http://www.nice-media-player-aud-nmf-player.com-about.com/) for these proprietary formats.

The encoded audio data probably doesn't need byte-swapping, that's generally the codec's job. I can't tell much else without seeing it, which doesn't seem likely to happen, confidential and all that...

Hi...

I trust the Moderators will allow this...

I can't really answer your question definitively but a few pointers.

I was once told your best test gear is ears, eyes, nose, and throat so......

Looking at your original post how do you get this???
//Hex Not. // Little-Endian unsigned int 32
10 00 00 00 // 84 (Ref Number)
54 00 00 00 // 70185301 (Ref Number)
55 F1 2E 04 ...

I am not sure why you are using "cat" when strings strips all human readable text as standard:-

strings /full/path/to/your/filename > /your/wanted/path/to/filename.txt

EDIT:-
Example:-...