[FFADO-devel] You guys rock

[Mark J. <mdj...@ya...>]

Thanks for the help with the Presonus Firepods.

After this week, I'll try some of the other suggestions that involve recompiling freebob and
libiec61883 but I got it working thanks to your help.

To test my setup, I use a metronome that feeds 7 splitters to give me a 1 -> 8 signal split.  Then
I record that and use audacity and a very tight zoom in to see how well the channels are in sync. 
With 3 units, the sync is normally 2 samples or less apart (.04ms out of sync).  With 4 unit
setup, the timing is off by 11 samples. (.23 ms out of sync).  I'm going to leave it recording all
night and check it again in the am to make sure it doesn't drift with time, but so far its never
done that.

Here is the setup

/usr/bin/jackd -dfreebob -r48000 -p512 -n5 -C -o0

4 daisy chained Presonus Firepods connected to the firewire connector on the back of an ASUS
P5B-VM Motherboard with 1.86GHz Core 2 Duo, 2GB ram, ubuntustudio

Jack version .103  (instead of the .102 that comes with ubuntustudio, however this might not be
necessary)

The key to getting it to run is the -C option which removes the output channels.  Since I don't
need them, I chose to leave them out.

It's amazing how you guys answered the question faster than Presonus did about how to sync up the
units using a word clock on S/PDIF

Thanks a lot,
Mark Jones