[Ardour-Users] Howto firgure settings out

[Svend-Erik Kjær Madsen]

Hi Martin

Thanks a lot, I've found out that I only can use a limited set of
combinations that's listed in my Digi96/8's manual. But thanks anyway,
it seems that if I aim for very low latency my jack driver give's
up :( Right now I'm working with 23ms latency witch is ok as long as I
monitor inputs which should be recorded externally. I only have a
computer with an AthlonXP 1800 cpu, maybe I should consider an
upgrade ? :)

/Sv-e
tir, 18 09 2007 kl. 17:54 -0700, skrev Martin Lynch:
> 
> 
> > Subject: [Ardour-Users] Howto firgure settings out
> > To: Ardour Users <ardour-users at lists.ardour.org>
> > Message-ID: <1190120050.5789.7.camel at STUDIO>
> > Content-Type: text/plain
> > 
> > Hey
> > I've just put in a REM Digi96/8 in my computer and attached it to a
> > Behringer ADA8000 interface. I can se all the ADAT ports so it seems all
> > okay so far. But I wonder how I can calculate the best setup for my card
> > so that it uses a minimum of processor time. I've managed to setup my
> > jack with these settings:
> > 
> > JACK compiled with System V SHM support.
> > loading driver ..
> > apparent rate = 44100
> > creating alsa driver ... hw:0,1|hw:0,1|256|4|44100|0|0|nomon|swmeter|-|
> > 32bit
> > 
> > Is there a simple formular to use to calculate settings such as
> > Frames/Period SampleRate Periods/Buffer.
> > 
> > Thanks in advantage
> > 
> > /Sv-e
> If what you mean is how to get the lowest latency, I believe the
> formula is:
> 
> (frames per period X periods per buffer) / sample rate X 1000 =
> latency in ms
> 
> Note Ardour often shows a different latency than JACK - not sure yet
> why - initially I thought perhaps it was showing one way rather than
> round trip latency, however my JACK latency shows 2.67ms while Ardour
> shows 0.7ms...I choose to believe Ardour ; - )
> 
> Here's a simple calculator in OpenOffice attached...
> 
> 
> 
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