18 Jun
2012
18 Jun
'12
3:59 a.m.
This is my first post to this list -- thanks in advance for advice. (Actually, I posted
this first on the jackit mailing list as it seems to be a jack configuration issue, but it
went ignored there for about 2.5 days so I'm trying again here.)
I'm trying to configure Jack 1.9.6 on Ubuntu 10.04 (with real-time kernel) to use all
four channels of an M-Audio fast track pro. The class-compliant USB audio driver reads a
pair of stereo devices:
card 1: Pro [FastTrack Pro], device 0: USB Audio [USB Audio]
Subdevices: 0/1
Subdevice #0: subdevice #0
card 1: Pro [FastTrack Pro], device 1: USB Audio [USB Audio #1]
Subdevices: 1/1
Subdevice #0: subdevice #0
I've set up a merged device in .asoundrc and tested directly against alsa, no
problem:
1. Play a stereo, 44.1 kHz, 16 bit file to hw:1,0.
2. Play the same file to hw:1,1.
3. Use SuperCollider to make a four channel version of the same file, and play this to the
merged device.
All of these tests are successful -- so I think the .asoundrc configuration is correct.
Jack can use either of the stereo devices -- hw:1,0 or hw:1,1 -- for playback with no
problem. I've been using that successfully for almost two years now.
But... (-Chw:1,1 is for the FTPro's stereo input)
/usr/bin/jackd -S -P60 -dalsa -r44100 -p1024 -n2 -D -Chw:1,1 -Pft4 -s
... gives me:
~~~
JACK server starting in realtime mode with priority 60
audio_reservation_init
Acquire audio card Audio1
creating alsa driver ...
ft4|hw:1,1|1024|2|44100|0|0|nomon|swmeter|soft-mode|32bit
Using ALSA driver USB-Audio running on card 1 - M-Audio FastTrack Pro at
usb-0000:00:1d.0-1.5, full speed
configuring for 44100Hz, period = 1024 frames (23.2 ms), buffer = 2 periods
ALSA: final selected sample format for capture: 16bit little-endian
ALSA: use 2 periods for capture
ALSA: final selected sample format for playback: 16bit little-endian
ALSA: use 2 periods for playback
ALSA: could not start playback (Broken pipe)
Cannot start driver
JackServer::Start() failed with -1
Released audio card Audio1
audio_reservation_finish
Failed to start server
~~~
Any ideas what I'm missing?
Thanks,
hjh
--
James Harkins /// dewdrop world
jamshark70(a)dewdrop-world.net
http://www.dewdrop-world.net
"Come said the Muse,
Sing me a song no poet has yet chanted,
Sing me the universal." -- Whitman
blog: http://www.dewdrop-world.net/words
audio clips: http://www.dewdrop-world.net/audio
more audio: http://soundcloud.com/dewdrop_world/tracks
18 Jun
18 Jun
8:18 a.m.
At Mon, 18 Jun 2012 09:58:50 +0800,
James Harkins wrote:
I'm trying to configure Jack 1.9.6 on Ubuntu 10.04
(with real-time kernel) to use all four channels of an M-Audio fast track pro. The
class-compliant USB audio driver reads a pair of stereo devices:
Hm, sorry for what turns out to be a bit of noise. I just found some old threads online
about bugs in the Intel USB chipset[1] which I would guess is in a large majority of
consumer laptops, maybe even desktops, on the market today. Those bugs seem to be the
cause of the "broken pipe" when ALSA tries to talk to the device.
I guess I'm lucky to get 2-in, 2-out.
Needless to say, I am exceedingly annoyed about this. One more stupid hardware thing to
check when looking at new machines...
hjh
[1] Intel Corporation 5 Series/3400 Series Chipset USB2 Enhanced Host Controller. On my
machine it's "rev 05" but I guess it hasn't been fixed.
--
James Harkins /// dewdrop world
jamshark70(a)dewdrop-world.net
http://www.dewdrop-world.net
"Come said the Muse,
Sing me a song no poet has yet chanted,
Sing me the universal." -- Whitman
blog: http://www.dewdrop-world.net/words
audio clips: http://www.dewdrop-world.net/audio
more audio: http://soundcloud.com/dewdrop_world/tracks
6:02 p.m.
On Mon, Jun 18, 2012 at 8:17 AM, James Harkins <jamshark70(a)gmail.com> wrote:
At Mon, 18 Jun 2012 09:58:50 +0800,
James Harkins wrote:
Hi James,
I think this is related to the EHCI driver in your kernel version. Try
with a more recent kernel, for example, the stock kernel in ubuntu
12.04. Read Clemens to understand the problem. Here:
http://old.nabble.com/No-duplex-mode-with-the-EHCI-driver-and-USB-hub.-Is-t…
Cheers! Pablo
I'm trying to configure Jack 1.9.6 on Ubuntu
10.04 (with real-time kernel) to use all four channels of an M-Audio fast track pro. The
class-compliant USB audio driver reads a pair of stereo devices:
Hm, sorry for what turns out to be a bit of noise. I just found some old threads online
about bugs in the Intel USB chipset[1] which I would guess is in a large majority of
consumer laptops, maybe even desktops, on the market today. Those bugs seem to be the
cause of the "broken pipe" when ALSA tries to talk to the device.
I guess I'm lucky to get 2-in, 2-out.
Needless to say, I am exceedingly annoyed about this. One more stupid hardware thing to
check when looking at new machines...
hjh
[1] Intel Corporation 5 Series/3400 Series Chipset USB2 Enhanced Host Controller. On my
machine it's "rev 05" but I guess it hasn't been fixed.
19 Jun
19 Jun
3:39 a.m.
At Mon, 18 Jun 2012 18:02:44 +0200,
Pablo Fernandez wrote:
I think this is related to the EHCI driver in your
kernel version. Try
with a more recent kernel, for example, the stock kernel in ubuntu
12.04. Read Clemens to understand the problem. Here:
http://old.nabble.com/No-duplex-mode-with-the-EHCI-driver-and-USB-hub.-Is-t…
Looks promising. I've hesitated to upgrade to 12.04 because of some reports of USB
audio devices not being recognized :-O
Probably what I should do is get another memory stick, put 12.04 "live" on it in
and try out the device that way before committing to upgrade my main install.
Also (for the sake of paranoia or caution, if nothing else) -- I can't imagine why the
low latency kernel for 12.04 would not have the patch, but stranger things have happened.
My situation seems to be a little different manifestation. I do get duplex operation with
the m-audio -- 2-in + 2-out works fine in Jack. It's only when I try 2-in + 4-out that
it dies. I tried this morning to test playback only:
/usr/bin/jackd -S -P60 -dalsa -r44100 -p1024 -n2 -Pft4 -s
... but no dice. ALSA says something about trying to acquire card Audio0 in addition to
Audio1 (though there is no need to do so), and then I get a long string of
"JackAudioDriver::ProcessSync: read error, skip cycle." This is the same error I
got when I was trying the laptop's built-in hardware for capture and the four-channel
device for playback. This puzzles me. I thought I was asking jack for playback only, but
the behavior is the same as when I also requested capture from a different device. Maybe
it's just that the merged device doesn't work at all with the kernel bug :)
hjh
PS Neither old.nabble.com nor mail-archive are inaccessible from mainland China, so it was
a bit of an adventure trying to find those archived threads (including using Windows [ugh]
and a free proxy service). Eventually got to:
http://article.gmane.org/gmane.linux.alsa.user/35816
--
James Harkins /// dewdrop world
jamshark70(a)dewdrop-world.net
http://www.dewdrop-world.net
"Come said the Muse,
Sing me a song no poet has yet chanted,
Sing me the universal." -- Whitman
blog: http://www.dewdrop-world.net/words
audio clips: http://www.dewdrop-world.net/audio
more audio: http://soundcloud.com/dewdrop_world/tracks
10 Jul
10 Jul
12:02 a.m.
At Tue, 19 Jun 2012 09:39:35 +0800,
James Harkins wrote:
At Mon, 18 Jun 2012 18:02:44 +0200,
Pablo Fernandez wrote:
Closing the loop on this -- I finally* checked out 12.04, and indeed, now I can get 2-in,
4-out with my FastTrack. Unfortunately, I get occasional xruns with this configuration
(even with lowlatency + rtirq), but (at least with light use) I don't hear audible
dropouts. 2-in, 2-out works without xruns.
So I'll test it some more, beat it up with some CPU-intensive SuperCollider code, but
I at least wanted to confirm that this analysis -- the kernel bug in 10.04 -- seems to
have been spot on.
Thanks a million! I never would have found that by myself --
James
* "Finally" = While the semester was still in session (the academic calendar is
a bit different in China, with the spring semester ending early in July), I didn't
dare do anything invasive to my system :) Now I'm on summer break, perfect time.
--
James Harkins /// dewdrop world
jamshark70(a)dewdrop-world.net
http://www.dewdrop-world.net
"Come said the Muse,
Sing me a song no poet has yet chanted,
Sing me the universal." -- Whitman
blog: http://www.dewdrop-world.net/words
audio clips: http://www.dewdrop-world.net/audio
more audio: http://soundcloud.com/dewdrop_world/tracks
I think this is related to the EHCI driver in
your kernel version. Try
with a more recent kernel, for example, the stock kernel in ubuntu
12.04. Read Clemens to understand the problem. Here:
http://old.nabble.com/No-duplex-mode-with-the-EHCI-driver-and-USB-hub.-Is-t…
Looks promising. I've hesitated to upgrade to 12.04 because of some reports of USB
audio devices not being recognized :-O
4554
days inactive
4575
days old
linux-audio-user@lists.linuxaudio.org
4 comments
2 participants
participants (2)
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James Harkins -
Pablo Fernandez