Hi, Can someone please comment about the below issue [root at host0040 kaushal]# file obd-demo.mp3 obd-demo.mp3: MPEG ADTS, layer III, v1, 256 kBits, 44.1 kHz, Monaural [root at host0040 kaushal]# sox obd-demo.mp3 -e stat sox: Failed reading obd-demo.mp3: Do not understand format type: mp3 [root at host0040 kaushal]# sox -V obd-demo.mp3 -r 8000 -c 1 -t ul -w vm-intro.ulaw sox: Failed reading obd-demo.mp3: Do not understand format type: mp3 [root at host0040 kaushal]# sox -v 0.125 -V <obd-demo.mp3> -t au -r 8000 -U -b -c 1 <obd-demo.ulaw> resample -ql -bash: obd-demo.ulaw: No such file or directory [root at host0040 kaushal]# sox -V obd-demo.mp3 -t au -r 8000 -U -b -c 1 obd-demo.ulaw resample -ql sox: Failed reading obd-demo.mp3: Do not understand foReply rmat type: mp3 [root at host0040 kaushal]# When i invoke the same obd-demo.mp3 it works perfectly fine host0040*CLI> channel originate DAHDI/g0/xxxxxxxxxx Application MP3Player /home/kaushal/obd-demo.mp3 [Sep 9 16:44:56] DEBUG[12691]: sig_pri.c:985 sig_pri_request: sig_pri_request 1 [Sep 9 16:44:56] DEBUG[12691]: sig_pri.c:6427 sig_pri_call: CALLER NAME: NUM: -- Requested transfer capability: 0x00 - SPEECH -- Launching MP3Player(/home/kaushal/obd-demo.mp3) on DAHDI/i1/9833754756-1 [root at host0040 ~]# rpm -qa | grep sox sox-12.18.1-1.el5_5.1 [root at host0040 ~]# rpm -qa | grep lame lame-3.98.4-1.el5.rf lame-devel-3.98.4-1.el5.rf [root at host0040 ~]# MP3 support in SoX is optional and requires access to either or both the external libmad and libmp3lame libraries. To see if there is support for Mp3 run sox -h and look for it under the list of supported file formats as "mp3". [root at host0040 ~]# sox -h sox: Version 12.18.1 Usage: [ gopts ] [ fopts ] ifile [ fopts ] ofile [ effect [ effopts ] ] gopts: -e -h -p -q -S -V fopts: -r rate -c channels -s/-u/-U/-A/-a/-i/-g/-f -b/-w/-l/-d -v volume -x effect: avg band bandpass bandreject chorus compand copy dcshift deemph earwax echo echos fade filter flanger highp highpass lowp lowpass mask mcompand noiseprof noisered pan phaser pick pitch polyphase rate repeat resample reverb reverse silence speed stat stretch swap synth trim vibro vol effopts: depends on effect Supported file formats: aiff al alsa au auto avr cdr cvs dat vms gsm hcom la lu maud nul ossdsp prc raw sb sf sl smp sndt sph 8svx sw txw ub ul uw voc vorbis vox wav wve Which package contains libmad and libmp3lame libraries available on CentOS 5.6 Regards, Kaushal