17 Nov
2004
17 Nov
'04
11:07 a.m.
Hi,
I've been trying out the novation xstation usb audio interface with
alsa 1.0.3, using the snd-usb-audio driver.
The first problem I encountered was to do with audio sample formats:
the hardware only supports 24 bit whereas most computer audio is 16
bit. So I tried to fix that with a .asoundrc:
pcm.novation {
type plug
slave {
pcm "hw:0,0"
format S24_3LE
}
}
something's still not quite right, however:
$ aplay -D novation korova.wav
Playing WAVE 'korova.wav' : Signed 16 bit Little Endian, Rate 44100 Hz,
Stereo
ALSA lib pcm_hw.c:325:(snd_pcm_hw_hw_params) SNDRV_PCM_IOCTL_HW_PARAMS
failed: Connection timed out
aplay: set_params:840: Unable to install hw params:
ACCESS: RRW_INTERLEAVED
FORMAT: S16_LE
....
Any ideas what's wrong here?
The same thing happens when i try with 'aplay -D default'.
But with 'aplay -D "hw:0,0"' the error is:
aplay: set_params:805: Sample format non available
Why should the error be any different? I thought default was the same
as hw:0,0?
From
http://www.alsa-project.org/alsa-doc/doc-php/asoundrc.php?
module=Generic:
"The keyword default is defined in the ALSA lib api and will always
access hw:0,0"
Nick
On 16 Nov 2004, at 15:30, Eric Dantan Rzewnicki wrote:
Nick Dowell wrote:
Hi,
I noticed there has been some discussion as to whether novation usb
midi and/or audio products will work with linux:
http://www.music.columbia.edu/pipermail/linux-audio-user/2003-August/
005765.html
I can tell you that the audio side of all out usb products are usb
class compliant, so they should work with the usb audio class
drivers. If they don't, please let me know.
The MIDI communication is not class compliant. It is a very simple
protocol though, and should be easy to implement. If anyone wants
information to write one we'd be more than happy to give it.
Thanks.
Nick Dowell
Software Team Leader
Focusrite Audio Engineering / Novation DMS
That was probably me. I bought a Remote 25 around that time. I'm only
using the midi interface. But, I am very interested in being able to
use it via USB. It would be great to be able to get firmware updates
and to save templates to my PC.
-Eric Rz.