I have an issue where certain sounds played through Playback are choppy. It’s somewhat intermittent. Voice quality of the actual calls is great, just IVR related vocals.
I’m using ulaw as the codec and I transcoded all of the Asterisk shipped GSM vocals to ulaw using sox. Here’s the command I used:
sox -V $i -r 8000 -c 1 -t ul $NEWFILENAME > /dev/null
This seemed to work in the past as Asterisk is no longer transcoding on the fly.
I realize this is a fairly nebulous issue with so simple solution. What I’m mostly looking for are troubleshooting steps. Based on one post I installed the dadhi tools and ran dahdi_test. Here’s the output:
Opened pseudo dahdi interface, measuring accuracy…
99.996% 99.989% 99.996% 99.996% 99.996% 99.996% 99.995% 99.996%
99.996% 99.993% 99.998% 99.993% 99.997% 99.996% 99.997% 99.997%
99.996% 99.994% 99.996% 99.995% 99.996% 99.995% 99.996% 99.995%
99.996% 99.995% 99.995% 99.996% 99.998% 99.995% 99.996% 99.996%
99.995% 99.996% 99.996% 99.996% 99.996% 99.996% 99.996% 99.997%
99.996% 99.996%
I suspect these results are somewhat irrelevant since I have no hardware. I’m strictly using VOIP.
The processor in the machine isn’t that good:
$ cat /proc/cpuinfo
processor : 0
vendor_id : GenuineIntel
cpu family : 6
model : 8
model name : Pentium III (Coppermine)
stepping : 6
cpu MHz : 731.047
cache size : 256 KB
fdiv_bug : no
hlt_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 2
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 mmx fxsr sse
bogomips : 1462.09
clflush size : 32
processor : 1
vendor_id : GenuineIntel
cpu family : 6
model : 8
model name : Pentium III (Coppermine)
stepping : 6
cpu MHz : 731.047
cache size : 256 KB
fdiv_bug : no
hlt_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 2
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 mmx fxsr sse
bogomips : 1462.13
clflush size : 32
I’m upgrading the machine in 2 weeks to a much beefier machine anyway. That might fix the problem.
I know it might also be network related but as i mentioned above voice quality seems fine. Is there a difference when Asterisk is playing an IVR sound vs call audio?
What’s frustrating is that this worked fine in the past and I’m unable to identity what changed. Like I said, any troubleshooting steps would be greatly appreciated.
thanks,
Aaron