Date: Tue, 17 Dec 2002 15:25:16 -0800 From: Ken Marx <kmarx@vicor.com> To: Michael Nottebrock <michaelnottebrock@gmx.net> Cc: freebsd@fadesa.es, freebsd-multimedia@freebsd.org, riggs@rrr.de Subject: Re: Poor audio quality with festival and hw.snd.pcm0.vchans > 0 Message-ID: <3DFFB25C.1080306@vicor.com> References: <Pine.BSF.4.21.0212161023280.11938-100000@InterJet.elischer.org> <3DFE1C75.B31E28D7@fadesa.es> <3DFF096E.414CFAF0@fadesa.es> <3DFF5D61.7050104@gmx.net>
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Michael Nottebrock wrote: > José M. Fandiño wrote: > >>>> I think this may be the same problem kmarx (ken marx) is seeing here >>>> with vchan> 1 due to the linear interpolation between sample points.. >>>> I think festival produces 8kHz or 16kHz data (can't remember), but the >>>> vchan sampler runs at 44 kHz. >>> >>> >> >> Excellent!, now it works. Doing a resample to 44100 Hz the nasty sound >> disappears. >> Just by using "mplayer -ao oss:/dev/dsp0.3 -srate 44100 /cdrom/*avi" >> everything works fine. > > > Metoo. Maybe this information should be included into a > package/port-message for the mplayer port. > fyi - It's really probably more to do with the vchan implementation in general and not specific to mplayer. I ran into this simply playing wave data. 16khz data were noisy; Higher sample rates (e.g., 11025hz) played more cleanly. I believe that Orion and Cameron were discussing work-arounds and possibly even an eventual re-design (apparently far from trivial). k -- Ken Marx, kmarx@vicor-nb.com Even the simplist minds see the need to not stand pat and objectify the risk analysis. - http://www.bigshed.com/cgi-bin/speak.cgi To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-multimedia" in the body of the message
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