the problem appears to be that most USB hubs (like my port replicator) only
support asynchronous transfer while audio devices need isochronous
transfers. That would mean, most likely, that if I plugged a hub that
supports isochronous transfer, for example the griffin hub, into my
asynchronous docking station I would still have problems...
# lsusb -v | grep Synch
just gives numerous Synch Type none listings
so it looks like i have to ditch the docking station unless anyone else can
think of something :(
Thanks again,
- Jonathan Beilin
>From: Steve Harris <S.W.Harris(a)ecs.soton.ac.uk>
>Reply-To: A list for linux audio users
><linux-audio-user(a)music.columbia.edu>
>To: linux-audio-user(a)music.columbia.edu
>Subject: Re: [linux-audio-user] USB Audio + docking station/powered
>hub(audiotrak optoplay)
>Date: Thu, 1 Apr 2004 23:04:48 +0100
>
>On Thu, Apr 01, 2004 at 12:36:28PM -0800, Jonathan Beilin wrote:
> > Hi, I'm running gentoo on a dell inspiron 8600 with a docking station &
>a
> > powered USB hub. When I'm undocked with the audiotrak optoplay plugged
>in
> > directly, it works fine. However, if I try to plug the optoplay in to
>the
> > docking station or the wall-wart powered USB hub the optical-digital
>light
> > is very faint and I get broken pipe reports when I send a signal to the
> > device. What is wrong?
>
>Thats interesting. This product:
>http://www.griffintechnology.com/products/usbaudio_hub/ claims to be a
>"USB Audio" hub, and I always thought it was BS, but maybe theres some
>truth in it.
>
>Sorry I dont have any helpful suggestions :( It could be that the audio
>device is trying to draw more power from a single port than the hub or
>docking station wants to provide, you can find out by running lsusb -vv as
>root and looking for the MaxPower line of your audio device and the power
>allowance (dunno what thats called) of the hub. The docking station will
>probably be a hub too.
>
>- Steve
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Hi, I'm running gentoo on a dell inspiron 8600 with a docking station & a
powered USB hub. When I'm undocked with the audiotrak optoplay plugged in
directly, it works fine. However, if I try to plug the optoplay in to the
docking station or the wall-wart powered USB hub the optical-digital light
is very faint and I get broken pipe reports when I send a signal to the
device. What is wrong?
Any help is appreciated; I'm tearing my hair out over this... all I need is
un-resampled digital audio out. I thought I had it solved, but I do want to
be able to use this with my docked laptop.
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Hi,
A new laptop I got uses somethign called SoundMAX under Windows.
dyne:bolic boots and brings up Alsa running something called snd-atiixp,
and lspci showing a bunch of ATI chips, but looking on the Alsa page I'm
not finding ATI.
Can someone point me towards the correct configuration page on Alsa
for this sound chip?
Thanks,
Mark
Hello.
I've been out of luck trying to work with sound on Linux. My experience
with Audacity, Jack and Ardour haven't been successful at all.
I was trying to create a .asoundrc file as, from what I read, it would
be one of the first necessary steps.
My soundcard is
[cyb@kali cyb]$ cat /proc/asound/cards
0 [Live ]: EMU10K1 - Sound Blaster Live!
Sound Blaster Live! (rev.8) at 0xa800, irq 10
and it's working well and I'm running Mandrake Linux 9.2 with Gnome.
My attempt at editing a .asoundrc file is shown below
pcm.!sb {
type hw
card 0
}
ctl.!sb {
type hw
card 0
}
pcm.jackplug {
type plug
slave { pcm "jack" }
}
pcm.jack {
type jack
playback_ports {
0 alsa_pcm:playback_1
1 alsa_pcm:playback_2
}
capture_ports {
0 alsa_pcm:capture_1
1 alsa_pcm:capture_2
}
}
which I copied and pasted from the Alsa site. Apparently it is working
because when I issued some commands to play a file they worked.
[cyb@kali cyb]$ aplay -d sd docs/voz.wav
Playing WAVE 'docs/voz.wav' : Signed 16 bit Little Endian, Rate 44100
Hz, Stereo[cyb@kali cyb]$ aplay -djackplug docs/voz.wav
Playing WAVE 'docs/voz.wav' : Signed 16 bit Little Endian, Rate 44100
Hz, Stereo
However, Jack is not working properly and when I try to run Ardour all
my running apps are killed and disappear.
Jack shows the following messages:
JACK compiled with System V SHM support
loading driver ..
open
starting engine
cannot set thread to real-time priority (FIFO/10) (1: Operation not
permitted)
cannot set thread to real-time priority (FIFO/20) (1: Operation not
permitted)
**** alsa_pcm: xrun of at least 10.319 msecs
I'm very sorry if the message is bit lengthy, but I wanted to give all
the info that I think is needed. Any tip or hint appreciated.
TIA
--
josenildo marques
icq #289971493
homepage http://cyb.ezdir.net
registered linux user #341648
*********
"Mistakes are the portals of discovery." James Joyce
I have been working on a method of synthesis whereby
a three dimensional space can be described through
the careful arrangement of destructive interference
nodes between sound sources. I have been able to
translate three dimensional shape definitions into
csound scores which feeds a csound orchestra instument
that has been constructed to anticipate the location
of interference patterns of low frequency sound
sources, given the relative postions of the speakers.
Not only is the audio product pleasing and artistically
valid, but one can actually visualise the reconstructed
shape in space between the speakers by exposing the
space to a suspended cloud such as smoke or dust.
By blowing smoke for instance between the speakers
as csound 'plays' the score, a vague but recognizable
reproduction of the original input shape can be seen.
What happens is that the places where destructive
interference nodes effectively stop the air movement,
the cloud particles become more visible than in those
spaces where the sound is active, and moving
the cloud particles more rapidly. The effect can
be quite astonishing, and opens, I believe, a very
important new avenue of compositional expression.
Here is an example of one of the more successful
images, a bust of Beethoven:
http://tobiah.org/beethoven.html
Tobiah
> Are you saying that the data needed for writing a driver has been
> collected? And all we need now is for someone to write a driver? That
> sounds promising.
For the analog i/o part developers said yes
> The only thing stopping me from ditching Windows entirely is getting
> multichannel sound going in Linux. I simply can not afford a newer card
> at the moment.
me too.
Felipe
Well, Kjetil Matheussen has done a fantastic job with vsti 0.0.3 and
vstserver. Today I have run my N.I. Kontakt as a vsti for two hours on
my RH9/CCRMA 1800XP 1 gig ddr PC with no x-runs on a soundblaster (!!)
c/w the worlds best softsynth, Zynaddsubfx( this thing rules !!)... I am
going to kick the XP sampler out of the studio tomorrow. You've got to
try this !! I have been waiting for this moment for such a long time.
Frankly I don't care if it crashes every hour on the hour, at least I'll
be running Linux and the only way from here is UP !!!
Now if Paul would just release beta 12 of Ardour, that could be another
XP biting the dust... who knows !!
Thanks sooo much to all involved for a great OS and some amazing
programming ! Jack/Ardour/Alsa/CCRMA/Zynaddsubfx/Qjackctl/ and so much
more coming... very exciting.
Geoff
