Re: [Discuss-gnuradio] jack audio source/sink status?

[Michael Dickens]

Hi David - I'm glad you got JACK going.  I don't use JACK myself, so I don't 
know how jackd works.  Maybe someone else on this this does? - MLD

On Mar 7, 2012, at 3:47 PM, David Kierzkowski wrote:

> ok thanks for the reply
> i finally made some progress and have jack support compiled in now.
> however i know have another problem. So i have jackd starting at boot
> 
> ps axw
> 4581 ?        SLsl   0:00 /usr/bin/jackd -R -d net
> 
> when i run gnuradio its forks its own instnace of jackd.
> 
> address@hidden:~$ ./jacktest.py
> linux; GNU C++ version 4.4.3; Boost_104000; UHD_003.004.000-307-gb61f4ad6
> 
> Using Volk machine: avx_64
> -- USRP-B100 clock control: 10
> --   r_counter: 2
> --   a_counter: 0
> --   b_counter: 20
> --   prescaler: 8
> --   vco_divider: 5
> --   chan_divider: 5
> --   vco_rate: 1600.000000MHz
> --   chan_rate: 320.000000MHz
> --   out_rate: 64.000000MHz
> --
>>>> gr_fir_ccc: using SSE
> len(audio_taps) = 317
>>>> gr_fir_fff: using SSE
> jackd 0.118.0
> Copyright 2001-2009 Paul Davis, Stephane Letz, Jack O'Quinn, Torben Hohn
> and others.
> jackd 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
> JACK compiled with System V SHM support.
> loading driver ..
> SSE2 detected
> creating dummy driver ... dummy_pcm|44100|1024|23219|2|2
> SSE2 detected
> audio_jack_sink[gr_sink]: unable to support sampling rate 48000
>  card requested 44100 instead.
> 
> 
> Is this how its supposed to work? where are the runtime config vars for
> the forked jackd process?