M2 Supported Codecs

 codec,ADPCM (IMA),mod_spandsp
 codec,AMR,mod_amr
 codec,B64 (STANDARD),mod_b64
 codec,G.711 alaw,CORE_PCM_MODULE
 codec,G.711 ulaw,CORE_PCM_MODULE
 codec,G.722,mod_spandsp
 codec,G.723.1 6.3k,mod_g723_1
 codec,G.726 16k,mod_spandsp
 codec,G.726 16k (AAL2),mod_spandsp
 codec,G.726 24k,mod_spandsp
 codec,G.726 24k (AAL2),mod_spandsp
 codec,G.726 32k,mod_spandsp
 codec,G.726 32k (AAL2),mod_spandsp
 codec,G.726 40k,mod_spandsp
 codec,G.726 40k (AAL2),mod_spandsp
 codec,G.729,mod_g729
 codec,GSM,mod_spandsp
 codec,LPC-10,mod_spandsp
 codec,PROXY PASS-THROUGH,CORE_PCM_MODULE
 codec,PROXY VIDEO PASS-THROUGH,CORE_PCM_MODULE
 codec,RAW Signed Linear (16 bit),CORE_PCM_MODULE
 codec,Speex,CORE_SPEEX_MODULE
 codec,Speex,mod_speex