[Jack-Devel] Audioadapter broken pipe error in Jack 1.9.8

I'm following the guides to get a working linux-to-linux netjack setup
running. I think I'm close, but I'm getting stuck with a "Broken pipe"
(and broken audio) when I try to load the audioadapter.

I'm running Jack2 version 1.9.8 which I start in realtime with the net
backend, like so:

[root@alarmpi jack2]# jackd -R -d net
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
NetDriver started in async mode without Master's transport sync.
Waiting for a master...
Initializing connection with bree...
**************** Network parameters ****************
Name : alarmpi
Protocol revision : 5
MTU : 1500
Master name : bree
Slave name : alarmpi
ID : 2
Transport Sync : no
Send channels (audio - midi) : 2 - 0
Return channels (audio - midi) : 2 - 0
Sample rate : 48000 frames per second
Period size : 2048 frames per period
Network latency : 5 cycles
SampleEncoder : Float
Slave mode : async
****************************************************



I load the audioadapter with this command in another terminal:

[root@alarmpi ~]# jack_load audioadapter -i "-d hw:CODEC"
audioadapter is running.
client name = audioadapter


When I do, the server gives this output followed by a long string of
"Broken pipe" messages accompanied by clicking noises on the USB audio
device:

Audio Interface Description :
Sampling Frequency : 48000, Sample Format : S16_LE, buffering : 2048,
nperiod : 2
Software inputs :  2, Software outputs :  2
Hardware inputs :  2, Hardware outputs :  2
Card info (address : 0x40d05490)
        ID         = CODEC
        Driver     = USB-Audio
        Name       = USB Audio CODEC
        LongName   = Burr-Brown from TI USB Audio CODEC at
usb-bcm2708_usb-1.2, full speed
        MixerName  = USB Mixer
        Components = USB08bb:2900
--------------
HW Params info (address : 0x466a3460)

--------------
HW Params info (address : 0x466a3c08)

--------------
../linux/alsa/JackAlsaAdapter.h:463, w3 : Broken pipe(-32)
../linux/alsa/JackAlsaAdapter.h:463, w3 : Broken pipe(-32)
../linux/alsa/JackAlsaAdapter.h:463, w3 : Broken pipe(-32)
../linux/alsa/JackAlsaAdapter.h:463, w3 : Broken pipe(-32)
../linux/alsa/JackAlsaAdapter.h:463, w3 : Broken pipe(-32)



Those broken pipe errors continue until I unload the audioadapter. I
should note that the network audio piece of this "worked", meaning I
could send sound from the host to this client by connecting all the
ports. It sounded terrible, of course, because these errors just kept
coming, but I feel like I'm very close to having a low-latency stream
to a $35 piece of hardware (a Raspberry Pi).

I am able to play audio from a "normal" audio player via Alsa through
the USB device without issue.

Any thoughts on what I could do to fix this or work around it?

I tried getting the latest version from git and managed to compile it
on this device, but jack wouldn't start. It kept giving a "Bus error"
accompanied by memory alignment errors in the kernel log. I assumed
that was something specific to the arm hardware and didn't want to
bother everyone with it. I can give more details on that if you want,
but my hope would be to find a solution within the 1.9.8 codebase I
have running "successfully" on this machine.

Thanks - let me know if you need more details.



___________________
Mark Kendrick
aeetos at [google's mail service] dot com

1350842324.20182_0.ltw:2,a <CALFtKw7Kf0L8a9wSiDXYpPXVPkRjeHNDBAEjV1wniRAij2RA9g at mail dot gmail dot com>