[linux-audio-user] using jack-rack as real time effects processor.

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On Fri, 31 Jan 2003 17:24:57 +0000
jordan muscott <jordan@xxxxxxxxxxxxx> wrote:

> 
> to the IN on my soundcard seems to get sent straight to the OUT ( i can
> record stuff ok ). Then i'm starting jack:
> 
> [root@larry jordan]# jackd -R  -d alsa -d hw:0

I'd start jackd with low frame-size/period:

-p 256 OR -p 128 OR -p 64

Also "-n" setting has something to do with the responsiveness but I'm not sure how much.


> and the starting jack-rack ( as root, of course ). I've tried using the
>
> I've tried making what seemed like the sensible connections here with
> jack_connect, but the sound i'm sending in either just gets echoed to
> the output ( as per normal ), or I get hideous feedback.

That's perfectly normal. (for what I know)  You just have to balance the line-in and PCM out levels, so that you get the effect but not the feedback.

The delay of the effect (latency) is dependent of the "-p" and "-n" setting of jackd.


janne


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