[LAU] Phonic Helix Board 24 on Fedora

pete shorthose zenadsl6252 at zen.co.uk
Fri Feb 13 12:50:11 EST 2009

On Thu, 12 Feb 2009 16:24:23 +0000
Jonathan Gazeley <jonathan.gazeley at bristol.ac.uk> wrote:

> Hi all,
> I'm trying to set up my Phonic Helix Board 24 on Fedora 10. I've added 
> the CCRMA repository but I'm *not* running a CCMRA kernel. I have just 
> used this repository to install ffado and jack.
> [jonathan at poseidon ~]$ uname -r
> [jonathan at poseidon ~]$ rpm -q ffado
> ffado-2.0-0.6.rc1.fc10.ccrma.i386
> Starting jack gives the output below. Running as root gives exactly the same output. I've made sure that all users have read/write permissions on the firewire port (chmod a+rw /dev/fw*)
> I'm a fairly experienced Linux user but I know very little about audio on Linux. Can anyone shed any light on this? I had the same Phonic device working on Fedora 8 some time ago but that computer is now a distant memory...
> Any help will be gratefully accepted!
> Thanks,
> Jonathan
> [jonathan at poseidon ~]$ jackd -d firewire
> jackdmp 1.9.1
> Copyright 2001-2005 Paul Davis and others.
> Copyright 2004-2008 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
> JACK server starting in non-realtime mode
> 17888687627:  (ffado.cpp)[  92] ffado_streaming_init: libffado 1.999.40- 
> built Dec 12 2008 16:33:37
> 17891092850: Debug (bebob_mixer.cpp)[ 126] 
> addElementForAllFunctionBlocks: Adding elements for functionblocks...
> libiec61883 warning: Established connection on channel 0.
> You may need to manually set the channel on the receiving node.
> libiec61883 warning: Established connection on channel 1.
> You may need to manually set the channel on the transmitting node.
> firewire ERR: Could not start streaming threads

I saw this error when i tried to start jack with optimistic period values.
try with something considerably higher to test that (add -p4096 -n3 -r96000
to the command line invocation for example). That's too much latency for
some (probably most) scenarios but it might get you a step closer to finding out what's wrong.
Get a RT kernel setup too and try that.


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