Hi, I'm testing Asterisk installation on my Slackware Linux Box, I am making calls from kphone. I've noticed that standard sample voice files attached to * distro (*.gdm files) havn't good quality. What can be done to improve it? I'm using alsa drivers. BR, Corvin
> voice files attached to * distro (*.gdm files) havn't good quality.sorry I meant *gsm files
On Mon, 2004-11-29 at 12:10 +0000, Corvin wrote:> Hi, > > I'm testing Asterisk installation on my Slackware Linux Box, > I am making calls from kphone. I've noticed that standard sample > voice files attached to * distro (*.gdm files) havn't good quality. > What can be done to improve it? I'm using alsa drivers.Adjust your expectations to telephone quality. Everything is based around 8khz samples and at best around 14 bit quality. The GSM files should be around cell phone quality due to the codec. You are welcome to rerecord any sound prompts you wish and use them at a slightly higher quality but 8khz 16bit PCM is the highest quality you can use. -- Steven Critchfield <critch@basesys.com>
> Adjust your expectations to telephone quality. Everything is based > around 8khz samples and at best around 14 bit quality. The GSM files > should be around cell phone quality due to the codec. You are welcome to > rerecord any sound prompts you wish and use them at a slightly higher > quality but 8khz 16bit PCM is the highest quality you can use.Heh sorry but I can't agree with you I am very familiar with GSM technology and I use every day cellphone with EFR codec. And voice quality of what I can hear from kphone is much worse :(. C. -------------------------------------------------------