[linux-audio-user] trying to get ssm's JackPlugin working

Dave Griffiths dave at pawfal.org
Fri Nov 14 10:22:34 EST 2003

Just checking -  but are ssm and jack set to the same buffer size?
It doesn't really sounds like this, but it could be...

On Fri, 14 Nov 2003 06:14:15 -0800, Jim Lynch wrote
> I built jack and ssm (and rebuilt my 2.4.22 kernel with caps, lowlat,
>  preempt) and I'm having problems getting the plugin to work.
> First, there was a function pointer type mismatch in the sample
> rate change callback function, which I fixed. Now, recent cvs
> ssm builds with jack-0.80.0 (well, for me... I could send my
> patch...)
> I get the jack plugin gui rect on the canvas of ssm without
> problem, it does switch back and forth between detailed and
> simple GUI.
> When I have the jack plugin without connecting it to anything
> and not attached to the jack server, output to the oss output
> works fine, but when I tell the jack plugin to attach, I get
> a buzz sound whose pitch is the same as the rate the Process
> callback is being called; if I have a mixer before the output
> plugin, the volume of the pitch is scaled by the volume sliders.
> When I have any jack plugin input connected from any ssm plugin
> output, -and- the plugin is attached to jackd -and- the jack
> plugin's input is routed to an alsa output, I get a different-
> sounding buzz that is also the same rate as the Process callback
> invocations. This buzzing sound is -not- scaled by any volume 
> sliders in ssm.
> At the moment, I'm not sure what to do... but I'm looking into
> the possibility that the samples as represented by jack are
> not of the same data type (-and- don't get converted) as the
> samples as represented by ssm.
> Comments? Help? :)
> -Jim
> -- 
> Jam sessions community web site: http://jam.sessionsnet.org

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