2012/1/13 Tvrtko Ursulin <tvrtko@email-addr-hidden>
> Hi all,
>
> By looking at the archives this seems like it could be the right list
> since I see a lot of people with a lot of domain experience here.
>
> I recently acquired a second hand PCI sound card from the subject and
> am having some sound quality issues which seem difficult to
> understand. It is a Envy24/ICE1712 (snd_ice1712) based cards and comes
> with a 5.25" IO module, although that is probably not relevant.
>
> Issue is that when playing something through it, there is intermittent
> static like distortion in high frequencies. It is not regular, it's
> character changes but I am unable to correlate it to any externals.
>
> * It happens regardless of whether I am sending audio directly via
> ALSA (directly to hw:0 or not), or with jackd running.
> * It happens on PCM out 0&1 and 2&3 (haven't tried 4&5 yet) routed
> directly to HW0&1 etc.
> * It is not triggered by DAC output level (Analog Volumes page)
> * Sound coming from line-in, mixed via Digital Mixer is not affected,
> while simultaneous PCM out mix-in is.
> * When playing silence issue does not show.
> * Distortion volume seems to perfectly track sound volume. Whether I
> play with DAC output levels or actual PCM source level.
>
> As far as I understand this chip set, since Line-in through digital
> mixer is not affected, this rules faults in:
> * digital mixer
> * DAC
> * analog output stage
>
> What is left? Something on the driver side? Unreported under/over
> runs? Something else? Interrupt line is not shared with anything else
> and nothing unusual gets reported in the kernel logs, or by jackd.
>
> Would it help if I recorded the distortion and shared it?
>
> Many thanks,
>
> Tvrtko
>
I have the same soundcard, works like a charm since 2007.
Telling us what's your distro/kernel would be of some help.
.asoundrc (if any)?
Did you put your onboard soundcard kernel module in the kernel blacklist ?
regards
-- *L'unica speranza di catarsi, ammesso che ne esista una, resta affidata all'istinto di ribellione, alla rivolta non isterilita in progetti, alla protesta violenta e viscerale.*
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Received on Fri Jan 13 12:15:03 2012
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