[linux-audio-user] soundfonts and samplers

[Russell Hanaghan]

On Wed, 2004-08-11 at 13:12, Iván Almada wrote:
> thanx! this entire patching system is wicked! im using
> qjackctl...
> 
> you could never expect to route midi and audio events
> this way with standard win apps even with rewire...

Qjackctl ROX! Big time!
> 
> this is awesome... 
> 
> other thing is that i bought the sb audigy just for
> using it with the asio drivers,  but with jack you
> dont need that right?  would a standart cheapo
> soundcard work this way? with the same latency? (using
> the planet ccrma stuff ) im asking this because one
> friend of mine wants to buy a soundcard just to do the
> same thing,  play with softsynths realtime (low
> latency) from the midi keyboard... maybe a sb live
> would do the job? 

My cheapy SB Live 5.1's would do 512x2 no problems on a slower machine.
256x2 was a bit touchy but did work on the 2.4.28 kernel running as
root.

No ASIO! No WDM...No freakin' proprietary junk here~ :)

> 
> thanx for the fast - straight-forward answer
> 
> 
> 
>  
> 
> 
> --- Chris Cannam <cannam at all-day-breakfast.com>
> escribió: 
> 
> > The generic answer to "how do I add effects to this
> > JACK app that 
> > doesn't immediately appear to support them?" is to
> > use jack-rack, 
> > which is a very nice standalone JACK effects rack,
> > hosting LADSPA 
> > plugins.  Run it up and then connect the output of
> > your other JACK 
> > app (Specimen in this case) into jack-rack using the
> > qjackctl audio 
> > connection manager.
> > 
> > (I can't remember offhand whether Specimen always
> > outputs to JACK or 
> > whether it also has direct ALSA output.  You will
> > obviously need to 
> > have it outputting to JACK and have jackd running
> > [via qjackctl for 
> > example] to do this.)
> > 
> > > how is the
> > > audio routed from specimen back into the midi host
> > > mixer (it displays audio in a channel called
> > rec... )
> > > but it has no slots for plug ins...
> > 
> > In this case the answer is that the audio is _not_
> > routed back into 
> > the midi host.  The only reason you see it on the
> > Rec meter in 
> > Rosegarden is because Rosegarden's record input is
> > connected to the 
> > soundcard capture channel, and that is receiving the
> > same audio as is 
> > being output to the speakers from Specimen.  Even if
> > you could apply 
> > effects at that point in Rosegarden, it wouldn't
> > alter the sound you 
> > actually hear while playing.
> > 
> > Note that this also implies that if you record the
> > results straight 
> > back into Rosegarden as it stands, you'll get some
> > noise because 
> > you'll be recording the mixed soundcard input, not
> > the pure output 
> > from Specimen or jack-rack (I think).  For a clean
> > recording, you'd 
> > have to use the same JACK connection manager to
> > disconnect the 
> > Rosegarden record input from the ALSA PCM in and
> > reconnect it to the 
> > output of Specimen or jack-rack or whatever.
> > 
> > 
> > Chris
> > 
> >  
> 
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