14 Nov
2015
14 Nov
'15
10:39 p.m.
Hello,
I have to be able to have audio after terminating jackd. Everything
works fine when jackd is present, xine, firefox, audio apps, etc. When
jackd is gone, no more audio. Taking xine as an example, pavucontrol
will show the output when it plays a video and will show that the
output goes to the onboard audio. If I choose the 1010LT card, then
xine freezes. Envy24 utility shows nothing.
I would like to be able to view, and hear, downloaded video clips
without jackd around.
Why ? Because the current bitwig has a bug in which jackd MIDI does
not work. This translates has having sound, but no MIDI from external
controllers. OTOH, if bitwig switches to ALSA then there's MIDI but no
sound until jackd goes away.
The goal is to follow bitwig tutorials.
There must be a way for audio apps to be able to output sound on the
1010LT without jack...
15 Nov
15 Nov
12:03 a.m.
On Sat, Nov 14, 2015 at 4:39 PM, jonetsu(a)teksavvy.com <jonetsu(a)teksavvy.com>
wrote:
Hello,
I have to be able to have audio after terminating jackd. Everything
works fine when jackd is present, xine, firefox, audio apps, etc. When
jackd is gone, no more audio. Taking xine as an example, pavucontrol
will show the output when it plays a video and will show that the
output goes to the onboard audio. If I choose the 1010LT card, then
xine freezes. Envy24 utility shows nothing.
I would like to be able to view, and hear, downloaded video clips
without jackd around.
Why ? Because the current bitwig has a bug in which jackd MIDI does
not work. This translates has having sound, but no MIDI from external
controllers. OTOH, if bitwig switches to ALSA then there's MIDI but no
sound until jackd goes away.
The goal is to follow bitwig tutorials.
There must be a way for audio apps to be able to output sound on the
1010LT without jack...
1) if an application is written to ONLY use JACK, then JACK must be running
for that application to output audio
2) if an application is written to use JACK or some other audio API, then
obviously JACK can be be stopped and the application can be told to use
another API
3) if an application is written to use some other audio API, then in
general, it will be a little complex to get it to work if JACK is running,
and trivial if it is not.
However, if your system was setup to deal with case (3), so that non-JACK
applications could be heard even when using JACK, then it is unlikely that
those same applications can be heard if JACK is not running.
For example, on my own system, JACK is the sole user of the only audio
interface I have that is connected to any speakers. All non-JACK
applications end up talking to PulseAudio (either directly, like Skype or a
web browser (for shame!)) or indirectly (via PulseAudio acting as the
default ALSA device). PulseAudio and JACK are connected via an ALSA
loopback device. If JACK is stopped, the non-JACK applications will
continue to function, but they cannot be heard.
So ... the way forward depends a great deal on the specifics of your system
and the applications in question.
--p
8:08 p.m.
On Sat, 14 Nov 2015 18:03:39 -0500
Paul Davis <paul(a)linuxaudiosystems.com> wrote:
1) if an application is written to ONLY use JACK, then
JACK must be
running for that application to output audio
2) if an application is written to use JACK or some
other audio API,
then obviously JACK can be be stopped and the application can be told
to use another API
3) if an application is written to use some other
audio API, then in
general, it will be a little complex to get it to work if JACK is
running, and trivial if it is not.
However, if your system was setup to deal with case
(3), so that
non-JACK applications could be heard even when using JACK, then it is
unlikely that those same applications can be heard if JACK is not
running.
The issue, after some tests, turns out to be in sending audio to the
M1010-LT card. As such, it ends up not having much to do with jackd. Of
course, jackd has to be terminated for bitwig to be able to both handle
MIDI (external keyboard controller) and having sound output. If jackd
is there then bitwig configured for jackd will not be able to handle
MIDI (and that is a problem I hope they fix). Then if bitwig is
configured for ALSA, it will not be able to use the M1010-LT output as
long as jackd is running. bitwig does not really speaks jackd as of
today. They added the jackd transport, although things remain to be
done.
Regarding audio to the M1010LT. Without jackd, I can use pavucontrol
(Pulse audio) to have the output of the VLC player going through the
M1010LT and through the speakers, as usual. But this does not work
once bitwig is launched. bitwig outputs through the 1010LT. My theory
is that it grabs the 1010LT and does not make it available to any other
app. The VLC output routed to the 1010LT as above will freeze VLC.
So fine. VLC uses the system board audio. I use headphones connected
to the board's audio output and I can then have the bitwig tutorial
videos and follow along with bitwig who outputs ont he 1010LT.
I really hope that the bitwig people will get it straight with jackd
MIDI in an upcoming release. So that it can be used integrated with
Ardour.
Cheers.
3297
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3298
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Paul Davis