> Have you tried the card under Windows to verify that it's not your card?

I have.

And remeber i said that it works perfectly when using JACK.

Thanks.

> 
> Mark Williams (MWP) wrote:
> >>What rate are you playing audio back at? Might JACK be sending audio at 
> >>a different rate than your other audio apps?
> >
> >
> >Nope, ive tried different rates, all do it (im trying to use 48khz).
> >
> >Any other ideas?
> >
> >Thanks again.
> >
> >
> >>Mark Williams (MWP) wrote:
> >>
> >>>>Hi Mark,
> >>>>
> >>>>Have you tried the card in a different machine? I've played with a 
> >>>>couple of these cards and haven't seen this problem at all. It sound 
> >>>>like an interference problem if anything.
> >>>>
> >>>>Try a different power supply, or move the audio card as far away from 
> >>>>the rest of your addon cards. Make sure no cables are near or touching 
> >>>>the card; I've seen interference from an addon USB cable near the card.
> >>>
> >>>
> >>>I have thought about the possibility of interferance.
> >>>
> >>>The fact there is no problem while using JACK to output audio leads me to
> >>
> >>think
> >>
> >>>it has to be an ALSA issue.
> >>>
> >>>I know what power supply / EMI induced noise sounds like, and this isnt
> >>
> >>it.
> >>
> >>>The noise (well its actually a tone) is constant and doesnt change with 
> >>>PC
> >>
> >>load
> >>
> >>>or HDD use.
> >>>I have made sure that the card is in the bottom PCI slot and is away from
> >>
> >>noise
> >>
> >>>creating hardware.
> >>>
> >>>Thanks
> >>>
> >>>
> >>>
> >>>>>Anyone??
> >>>>>
> >>>>>I need to get this problem fixed.
> >>>>>
> >>>>>Is there any othr info i can provide that will help work out the 
> >>>>>problem?
> >>>>>
> >>>>>Thanks.
> >>>>>
> >>>>>
> >>>>>
> >>>>>
> >>>>>>Hi all,
> >>>>>>
> >>>>>>Ive come across quite an odd problem.
> >>>>>>
> >>>>>>When playing audio via my Revo7.1 card using ALSA, i get a high 
> >>>>>>pitched
> >>>>
> >>>>tone (est
> >>>>
> >>>>
> >>>>>>~14khz) mixed with the audio im playing.
> >>>>>>
> >>>>>>The tone is constant and is not effected by the volume controls.
> >>>>>>The tone is only present while an app (for example aplay) is using the
> >>>>
> >>>>card.
> >>>>
> >>>>
> >>>>>>Some apps cause the tone to be louder thea others (but the tone is of
> >>
> >>the
> >>
> >>>>same
> >>>>
> >>>>
> >>>>>>constant freq).
> >>>>>>
> >>>>>>What makes the problem strange is that if i use JACK to play audio
> >>
> >>through
> >>
> >>>>the
> >>>>
> >>>>
> >>>>>>card, the tone isnt present at all.
> >>>>>>
> >>>>>>Has anyone else come across this problem?
> >>>>>>
> >>>>>>BTW, im using the latest kernel (2.6.5) with the ALSA drivers that 
> >>>>>>came
> >>>>
> >>>>with it.
> >>>>
> >>>>
> >>>>>>Thanks,
> >>>>>>Mark.
> >>>>>>
> >>>>>>
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