[PLUG] Smoothing audio
Roderick A. Anderson
raanders at acm.org
Wed Apr 30 15:04:39 UTC 2008
Quentin Hartman wrote:
> On Tue, Apr 29, 2008 at 9:36 AM, Roderick A. Anderson <raanders at acm.org>
> wrote:
>
>> Thanks for the clue-stick tap. :-)
>
>
> My pleasure. Clue-sticking is one of my favorite hobbies. :D
>
>
>> I listened to the files again and
>> realized it was more a phone system issue. Could be my home phone, cell
>> phone or maybe even the Asterisk box is causing the problems. Most of
>> the choppy pieces were not so bad when played on my workstation.
>
>
> I presume that you are feeding the audio in from output on a sound card?
> Make sure the gain is not too high. If the bad parts tend to be at louder
> points or "s" or "t" sounds in the speech, your telephony card might be
> clipping due to too high volume. Does your analog interface card do any sort
> of audio processing in hardware? If so, try turning that on/off and see if
> it makes any difference. Finally, make sure whatever voice settings you are
> using are not producing any weird high or low-pitched tones. Phone systems
> are really only meant to carry frequencies found in normal speech, and
> adding frequencies outside of that range can sound really awful.
Actually they are generated from text files to .wav (8kHz) files then
converted to .gsm. I understand there are some setting I can tweak in
Asterisk or during the conversion but haven't had a chance to get back
to that.
I do want to experiment with Audacity and see what I can do when
recording so these suggestions will help. On the Asterisk box I'd
prefer my messages in my voice but that requires a bit more patience
than typing in the text, converting, listening and then fiddling with
the text and repeat.
Rod
--
>
More information about the PLUG
mailing list