[linux-audio-user] jack connections

Frank Barknecht fbar at footils.org
Thu Mar 13 08:10:00 EST 2003

Levi Burton hat gesagt: // Levi Burton wrote:

> Is there a command line interface to jack connections?  Something similar to 
> aconnect? qjackconnect is broken for me.  Besides, I would like to know what 
> is going on "under the hood" so to speak.

jack_lsp and jack_(dis)connect are included in the jack archive. 
Attached is a simple Python-script I just wrote, that automates some
connections I use for DJ'ing:

I run two alsaplayer instances and Pd. The players' output should go
to the 4 Pd inputs to wreck havoc with them in Pd before they go to

"connect-ap-pd" first disconnects both alsaplayers from their
alsa-outs, and then connects them to Pd.

I also couldn't build qjackconnect with g++-3.2, so I made this script

have fun
 Frank Barknecht                               _ ______footils.org__
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import os,string

PD=["pure_data_0:input0", "pure_data_0:input1", "pure_data_0:input2", "pure_data_0:input3"]
ALSA=["alsa_pcm:playback_1", "alsa_pcm:playback_2"]

AP=os.popen("/usr/bin/jack_lsp | grep alsaplayer ")
ap = map(string.strip, AP.readlines())
print ap

for i in range(len(ap)):
	ai = i % 2
	cmd = "jack_disconnect %s %s" % (ap[i],ALSA[ai])
	print cmd
	cmd = "jack_connect %s %s" % (ap[i],PD[i])
	print cmd


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