Messages in this thread |  | | Date | Fri, 05 Oct 2001 17:05:48 +0200 | From | noreply@tsc ... | Subject | Re: Sound artifacts in Gravis Ultrasound |
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> I have a Gravis Ultrasound sound card. I suspect kernel from > non-continuous feed of audio > data into the device. > > When I feed directly a sine-wave data into /dev/dsp, 100Hz, 1KHz, 10kHz, > there is > a distortion that can be heard on 1kHz, is not heard on 100Hz and is > very strong at 10kHz. > It sounds like every several-per-second to several-ten-per-second, the > data in the sound > card are repeated (for several samples). The distortion occurs > permanently and generates > a regular sound, something like a car ignition system makes in board > radio. > > When I play mp3 (mpg123) or Ogg Vorbis (ogg123), it can be heard also, > when suitable > pattern is present in the music to make the distortion audible. > > It is not caused by my amplifier (audible also in earphones), not caused > by too > much volume (when playing on low volume, it is also there, it's a linear > phenomenon). > The sound of distortion is also not added to the signal, because can not > be heard > when certain sound patterns appear in the music. > > Is there any kernel setting that improves continuity of data feed? The > card is > Gravis Ultrasound Plug'n'play, on ISA.
I have the exact same problems using a Sound Blaster 128 PCI with the es1371.
It's a linux problem because it works with Windows 98. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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