Steve Can you offer some recommendations regarding the sox arguments to use? My use of sox for down sampling is limited to this kind of command:
sox in.wav -r 8000 out.gsm Are there other arguments that will give better sound from compressed formats? Thanks Bill Seddon -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Steve Underwood Sent: September 20, 2004 2:33 PM To: Asterisk Users Mailing List - Non-Commercial Discussion Subject: Re: [Asterisk-Users] English vs American voice files [EMAIL PROTECTED] wrote: >On 20 Sep 2004 at 12:38, Andreas Sikkema wrote: > > > >>[EMAIL PROTECTED] wrote: >> >> >> >>>Initially we recorded using 16 bit/8K sampling on the basis >>>that this is what is required by Asterisk but that was >>>really terrible. So we're sampling at higher rates on >>>the basis that we can use sox to change it as necessary. Any >>>thoughts on what we can do to make the recordings sound "sharper"? >>> >>> >>We've found that downbsampling with sox resulted in >>significantly lower quality files as those downsampled >>with Cool Edit. >> >> > >Dithering in Cool Edit maybe? > >Matt Riddell > > sox offers several ways to change sampling rates. The poorest one is really quite poor. The best should not be distinguishable from any other good converter over a telecphone line. Dithering is completely irrelevant for telephony. It too LoFi to notice. :-) Regards, Steve _______________________________________________ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users _______________________________________________ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
