Subject: Re: [linux-audio-dev] LADSPA and TiMidity++
From: David Olofson (david_AT_gardena.net)
Date: Fri Sep 20 2002 - 01:45:12 EEST
On Thursday 19 September 2002 20.07, Peter L Jones wrote:
[...]
> > An alternative is to make
> > TiMidity++ a jack client, and then you can pipe jack output to an
> > LADSPA network if you wish, via maybe ardour.
>
> That's fine if you're controlling TiMidity++ etc from a PC - but
> how do I fix up the pipeline from my controller keyboard?
Same way as with current TiMidity++, I guess. (JACK doesn't deal with
MIDI, so that's still up to clients.)
So, provided you can have Ardour or some other app do MIDI controlled
mixer configuration ("net building") and perhaps automation, making
TiMidity++ a JACK client that outputs each MIDI channel's voices to
it's own port, would form a complete solution.
[...load-on-play...]
> That depends on a number of factors (e.g. how much RAM you have).
> It's not something that's bothering me at the moment. I'm not
> skilled enough to be switching patches mid-play :-).
In fact, you should never do that anyway, as mosts synths do weird
things when switching patches. Many will just kill any playing voices
on the channel. Most h/w synths can't play patches directly from
storage, as that's usually slow and/or "off-bus" memory. Instead,
they have one local patch memory area for each "part"/MIDI channel.
As a result, they need to kill voices before switching, since they
won't know how to control them when the old patch data has been
overwritten.
Just switch to a different channel, where you have the right patch
selected already.
I have the very same problem with Audiality, BTW, although there, the
solution is just a matter of keeping old patch plugins in a queue,
running in parallel with the current plugin for as long as they need.
That kind of flexibility is one of the major advantages with "general
purpose" computers. :-)
//David
.- M A I A -------------------------------------------------.
| Multimedia Application Integration Architecture |
| A Free/Open Source Plugin API for Professional Multimedia |
`---------------------------> http://www.linuxdj.com/maia/ -'
.- David Olofson -------------------------------------------.
| Audio Hacker - Open Source Advocate - Singer - Songwriter |
`-------------------------------------> http://olofson.net -'
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