Re: [Jack-Devel] EMU 0404 with jack dbus

На Wed, 26 Oct 2011 08:38:35 +0300
Nedko Arnaudov <[hidden]> записано:

> Both jackd and jackdbus use same code for interaction with ALSA. Its
> in libjackserver.so and the JACK driver for ALSA. If you see
> differences in interaction with ALSA, then you've configured jackdbus
> differently than jackd. Or you are using different version of JACK.
> Make sure to reactivate jackdbus process after installing new version
> system wide.

I played with jackd:

$ jackd --realtime -dalsa -r44100 -p256 -n2 -Phw:2
jackdmp 1.9.8 Copyright 2001-2005 Paul Davis and others.
Copyright 2004-2011 Grame.
jackdmp comes with ABSOLUTELY NO WARRANTY
This is free software, and you are welcome to redistribute it
under certain conditions; see the file COPYING for details
no message buffer overruns
no message buffer overruns
no message buffer overruns
JACK server starting in realtime mode with priority 10
creating alsa driver ... hw:2|-|256|2|44100|0|0|nomon|swmeter|-|32bit
control device hw:2
configuring for 44100Hz, period = 256 frames (5.8 ms), buffer = 2
periods ALSA: final selected sample format for playback: 16bit
little-endian ALSA: use 2 periods for playback

This configuration plays well.

but alsa_in with same device captures with lags.
sample of lags: http://akhil.ru/drop/955v

$ jackd --realtime -dalsa -r44100 -p256 -n2 -Chw:2
jackdmp 1.9.8
Copyright 2001-2005 Paul Davis and others.
Copyright 2004-2011 Grame.
jackdmp comes with ABSOLUTELY NO WARRANTY
This is free software, and you are welcome to redistribute it
under certain conditions; see the file COPYING for details
no message buffer overruns
no message buffer overruns
no message buffer overruns
JACK server starting in realtime mode with priority 10
creating alsa driver ... -|hw:2|256|2|44100|0|0|nomon|swmeter|-|32bit
control device hw:0
configuring for 44100Hz, period = 256 frames (5.8 ms), buffer = 2
periods ALSA: final selected sample format for capture: 16bit
little-endian ALSA: use 2 periods for capture

This one captures well.

$ jackd --realtime -dalsa -r44100 -p256 -n2 -Chw:2 -Phw:2
jackdmp 1.9.8 Copyright 2001-2005 Paul Davis and others.
Copyright 2004-2011 Grame.
jackdmp comes with ABSOLUTELY NO WARRANTY
This is free software, and you are welcome to redistribute it
under certain conditions; see the file COPYING for details
no message buffer overruns
no message buffer overruns
no message buffer overruns
JACK server starting in realtime mode with priority 10
creating alsa driver ... hw:2|hw:2|256|2|44100|0|0|nomon|swmeter|-|32bit
control device hw:2
configuring for 44100Hz, period = 256 frames (5.8 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

Lags both for capturing and playback. 
This is sample of captured audio with lags http://akhil.ru/drop/c5hc

Interesting thing:
$ jackd --realtime -dalsa -r44100 -p256 -n2 -Chw:2,2 -Phw:2,3
jackdmp
1.9.8 Copyright 2001-2005 Paul Davis and others.
Copyright 2004-2011 Grame.
jackdmp comes with ABSOLUTELY NO WARRANTY
This is free software, and you are welcome to redistribute it
under certain conditions; see the file COPYING for details
no message buffer overruns
no message buffer overruns
no message buffer overruns
JACK server starting in realtime mode with priority 10
creating alsa driver ...
hw:2,3|hw:2,2|256|2|44100|0|0|nomon|swmeter|-|32bit control device hw:2
configuring for 44100Hz, period = 256 frames (5.8 ms), buffer = 2
periods ALSA: final selected sample format for capture: 32bit integer
little-endian ALSA: use 2 periods for capture
ALSA: final selected sample format for playback: 16bit little-endian
ALSA: use 2 periods for playback
playback and capture sample rates do not match (48000 vs. 44100)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

Seems like driver do not sets capture rate to 44100

===8@))-<-<
Ильдар Ахметгалеев aka AkhIL
Ср. окт. 26 14:42:23 NOVT 2011
Wed Oct 26 07:42:23 UTC 2011
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Заходите в гости: http://akhil.ru

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