[Alsa-user] Problems with Midiman D1010, Asus A7V, PCI bus master: garbled, jittered sound

[Markus H. (LINK999) <hei...@fm...>]

Hello,

I=B4ve successfully installed the alsa-driver-package (0.5.11) on a =
linux 2.4.4 kernel with
a Midiman Delta 1010 Soundcard (ice1712, envy24).=20
I can play wav-files without any problems (ecasound -i =
some-stereo-file.wav -f:32,10,44100 -o alsa,0,0, you know).
But in X11, when playing a file in background and picking up an window =
and moving it around very fast the sound gets kind
of garbled (not buffer underuns!). It also seems that the "pitch" of the =
sound decreases a little bit (slows down). This gets worse with =
vgalib-applications (not X11) when I move an slider, for example.

I suppose that the problem is a conflict on the pci bus, i.e. although =
the graphics card is an AGP-card (Creative GeForce 2MX),
it somehow might block the pci bus too long so that the dma-ed samples =
to the soundcard get delayed.

My box is an AMD-Athlon 1GHz with an ASUS A7V board.
By the way, the same problem occurs when accessing the hard disc very =
extensively (on the UDMA-PROMISE controller;
PCI-bus too.)

One more, these are not buffer underuns (ecasound would report that), it =
sounds "different".

Perhaps someone has observed the same problems and perhaps there=B4s a =
solution ?
Many thanks for reading and your interest,

greetings,
Markus