Re: [Jack-Devel] JACK output via Bluetooth

On Wed, February 19, 2014 8:31 am, Holger Marzen wrote:
> On Tue, 18 Feb 2014, Paul Davis wrote:
>
>> On Tue, Feb 18, 2014 at 3:59 PM, Holger Marzen <[hidden]> wrote:
>>
>> >
>> > 2.) zita-j2a
>> >     It can't be run. It complains:
>> >
>> >     hm@wolke:~$ zita-j2a -v -p 128 -c 2 -d btphilips
>> >     Alsa_pcmi: detected more than 1024 playback channnels, reset to 2.
>> >     Alsa_pcmi: can't set playback period size to 128.
>> >     Can't open ALSA playback device 'btphilips'.
>> >
>>
>> did you try changing the period size?
>
> Yes. Same result. I can use the same period size as my jackd (256), I
> can leave it blank or use another. The zita-doc says it want's a hw:
> device. That's probably the source of the problem.
>
>> also, your question is really not about how JACK can output to
>> bluetooth,
>> but about how to add an additional Bluetooth device to JACK for output
>> when
>> JACK is using some other device as the primary clock source.
>
> It doesn't have to be an additional device. I'd be happy if my JACK
> based programs could output to a bluetooth device, even if this would be
> the only device that JACK is sending its output to.
>
> So I tried the following simple .asoundrc:
>
> ctl.btphilips {
>     type bluetooth
> }
>
> pcm.btphilips {
>     type bluetooth
>     device "00:1D:DF:E4:59:B6"
>     profile "auto"
> }
>
> And I tried to start jackd:
>
> hm@wolke:~$ /usr/bin/jackd -t2000 -dalsa -r44100  -n2 -p1024 -Pbtphilips
> 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
> JACK server starting in realtime mode with priority 10
> control device hw:0
> audio_reservation_init
> Acquire audio card Audio0
> Acquire audio card Audio-1
> creating alsa driver ...
> btphilips|-|1024|2|44100|0|0|nomon|swmeter|-|32bit
> configuring for 44100Hz, period = 1024 frames (23.2 ms), buffer = 2
> periods
> ALSA: final selected sample format for playback: 16bit little-endian
> ALSA: use 6 periods for playback
> ALSA: could not start playback (File descriptor in bad state)
> Cannot start driver
> JackServer::Start() failed with -1
> Failed to start server
> control device hw:0
> Released audio card Audio0
>
>
> It looks as if I am not far away from a working setup. But what's missing?

Have you tried it with -n3 and -p48000

i.e.

/usr/bin/jackd -t2000 -dalsa -r48000  -n3 -p1024 -Pbtphilips


Also can you play audio to the device with aplay:

aplay -f cd -d btphilips test.wav






--
Patrick Shirkey
Boost Hardware Ltd

1392922294.28977_0.ltw:2,a <62826.86.105.95.182.1392922392.squirrel at boosthardware dot com>