Re: Help/advice on RME cards and Linux ALSA

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On Fri, 19 Jan 2007 08:28:17 -0800
"ronan mcallister" <bass.woofer@xxxxxxxxx> wrote:

I think the problem is not Alsa but Jack
> as I can playback wav's and capture audio through Alsa (eg aplay,
> amarok), but anything I playback through Jack connections (Ardour etc)
> is distorted - noisy - clicky and no answer found yet.  I'm not sure
> how to troubleshoot Jack.
> 

I used JACK a couple of years ago, it was OK more or less - the
main problem was my own very heavy LADSPA plugin.

Anyway, I'd suggest to start from running JACK as root and with long
buffers/periods.

If/when you achieve good sound quality, try to shorten buffers/periods
to decrease latency.

If your machine has a free PCI (not PCI Express) slot, I'd suggest to buy
something antique, cheap and well-supported like an old SoundBalster 128
(es1371 driver). Such cards can be bought for pennies on eBay.

The point is to make sure that ALSA support is flawless, and the only
problems you have are the ones with JACK.

By the way, when I was using JACK, I worked with SBLive 5.1, but sound quality
wise I think es1371 cards are better.

Once JACK issues are sorted out, you can return to more modern cards
with higher sound quality.

Regards,
  Sergei.

-- 
Visit my http://appsfromscratch.berlios.de/ open source project.

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