05-29-06 09:57 PM
These are the specs:
=95Raw PCM (no header)
=958000 samples per second
=958 bits per sample
=95ulaw compression
=95Maximum ring size=9716080 samples
=95Minimum ring size=97240 samples
=95Number of samples in the ring evenly divisible by 240
=95Ring starts and ends at the zero crossing.
So if you've got 8000 samples per second and your total number of =
samples needs to be evenly divisible by 240 then to keep the math =
simple make the total length of the ringer some increment of 1.5 =
seconds. Of course the max ring size allows for a 2.01 second ring =
file at 16080 samples.
As for the zero crossing I have no idea what that means. Maybe just =
that the beginning and end of the audio has 0 amplitude (ie silent)?
HTH,
-Ryan
On May 26, 2006, at 12:11 PM, Tim Reimers wrote:
Anyone got any clue on how to set the zero crossings and the number =
of samples to be divisible by 240??
CCMstuff. org and cisco say to do that..
I've created a steelpan ringer, and the phone plays it, but it's all =
distorted--
Sounds as if I've violated one of the rules regarding the PCM file.
I followed the instructions of 8k samples, 8 bit..pcm ulaw format=85
I guess it's the number of samples or something, or not divisible by =
240=85
I have no idea how to do that last in Audacity or in Sound Recorder...
Not sure what to do from here=85.
Thanks, Tim
________________________________________
_______
cisco-voip mailing list
cisco-voip@puck.nether.net
https://puck.nether.net/mailman/listinfo/cisco-voip
[ Post a follow-up to this message ]
| 
Attachment: 
