IMA-ADPCM is the most suited codec when
CPU resources are already used by video and when audio is
more an additional than a primary feature.
It's a low cost solution for simple audio
compression that requires low CPU load. IMA-ADPCM is
independent of sound type (not a speech or psychoacoustic
The codec is available for the Texas
Instruments 'C64x DSP family (DM64x included) and for PC.
It is compatible with most media players and operating
systems used with client systems.