I'm trying to use a E-MU 0404 USB soundcard for sound recording on
Debian 11 with jack and ardour. It works well if I use a 48 kHz sampling
rate, but if I go up to 96 kHz I get severe sound distortions. A post in
this forum discussion (post #25):
https://www.diyaudio.com/forums/equipment-and-tools/338888-mu-0404-linux-issues-rew-96-khz-3.html?s=4e4a688f32b10c56f39c3d4ed6133091
suggests that the problem can be circumvented by using the card as a
2-channel device (disabling the SPDIF inputs, which I don't use anyway),
and gives an example of the `.asoundrc` configuration needed to achieve
that. I tried that solution by putting this in my `.asoundrc`:
pcm.emu2ch {
type hw
card "USB"
device 4
format S24_3LE
channels 2
}
ctl.emu2ch {
type hw;
card 4;
}
but I'm unable to initialize jack from the command line calling the
`emu2ch` device. I get the following error:
creating alsa driver ...
emu2ch|emu2ch|1024|2|48000|0|0|nomon|swmeter|-|32bit
ALSA: Cannot open PCM device alsa_pcm for playback. Falling back to
capture-only mode
cannot load driver module alsa
no message buffer overruns
In qjackctl I don't see the 2-channel version of the card as a
selectable option.
My understanding of options for calling jack from the command line is
quite limited. My understanding of `.asoundrc` configuration options is
even more limited. I'm hoping that someone could point me out to a
solution to use the card as a 2-channel device through jack, and thus
hopefully circumvent the sound distortion issue when recording at a 96
kHz sampling rate.
Best,
Sam
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