26 Sep
2008
26 Sep
'08
7:31 a.m.
thanks for the reply Pieter.
after sending you the message i realised how stupid i waws regarding
jack. i was thinking that the latency had to be low so that the live
output wouldn't be too delayed, but completely forgot the whole point
of the 'input mix' part :P
you are of course right - i can set a high buffer in jack for any
recording and to just have the device streaming, but the input mix
should still be virtually 0 latency. i need someone to smack me in the
head :)
on a side note, i have in the past had trouble getting the input mix
to output anything (i could only get outputs from the pc channels, not
input mix), but i don't have the ability to test it right now so i
will assume i was just doing something else silly.
porl
ps. what does the 'mixing/tracking' toggle do? i couldn't notice any
difference last time i checked.
pps. looking forward to getting a chance to test the new low latency
of ffado! :)
2008/9/25 Pieter Palmers <pieterp(a)joow.be>be>:
porl sheean wrote:
a while ago i purchased a focusrite saffire pro 26io. it has finally
come to a point where it is quite reliably useful as an interface for
jack/ardour (the latency isn't brilliant, but i'm pretty sure that is
the fault of my firewire chipset).
I fixed latency for ffado yesterday, and at least one person reports 3x32 as
working for him. So if you have a good firewire chipset, you will also be
able to achieve this. But maybe wait for beta7.
i found out recently that unfortunately, in order to get teh device
working as a basic 'summing mixer' for live work (i wanted to
essentially use it as a basic 8 in 1 out preamp to send to a small
desk at a venue) it needs to be set in 'streaming mode'. i can get
this working by starting jack and just leaving that running, but i was
wondering if anyone knew of an easier way (maybe one of ffado's
command line utilities? there seem to be a lot in there and i don't
know what half of them do). if not, would it be difficult to write a
small app that basically just 'turns on streaming'? or should i just
keep using jack? (i am hesitant to do this as i have still had a few
issues with dropouts, and as you can imagine at a live performance
this could be a problem).
The fact that streaming has to be turned on is a design decision of
Focusrite. We can't change that.
I don't see why you wouldn't use jack. What's the point in using a separate
application that basically does the same? Just run jack with a large period
size, and you should be fine. Something along the lines of:
jackd -R -d firewire -p2048 -n4
should work fine. I've done multi-hour recordings with the pro26 at 3x1024
without any problem whatsoever.
Greets,
Pieter
PS: Most of the command line tools in the ffado repository are test or debug
tools.