Subject: Re: [linux-audio-dev] LADSPA and TiMidity++
From: Peter L Jones (peter_AT_drealm.org.uk)
Date: Thu Sep 19 2002 - 21:07:32 EEST
On Thursday 19 Sep 2002 04:10, Likai Liu wrote:
> I've been playing with TiMidity++ for a while, and hacked it a bit as
> well. For what I think, given the complexity of internals, it is not
> worth making TiMidity++ an LADSPA host and having to add some TiMidity++
> specific MIDI controller events.
That's why I was proposing to use NRPNs.
> Only programs that are specifically
> designed to manipulate LADSPA network in TiMidity++ would be able to
> take advantage of that feature anyways.
Err, the whole point is so I can control the LADSPA plugins from my controller
keyboard. Any MIDI controller would be able to do the same.
> 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?
Also, I don't want to store the rendered output, I want to store the MIDI
performance.
[snip]
> by the way, since you mentioned it, there is a big flaw in TiMidity++
> when it is used as a real time synthesizer. when you start playing midi
> and it uses some patch or sound sample that was not previously used,
> then TiMidity++ loads that patch/soundfont from disk into memory, but it
> takes too much time to do so! You really can hear a blip when that
> happens.
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 :-).
> One way to reduce the chance (but not totally eliminate) to
> that situation is to preload all patches into kernel buffer by something
> like: grep -r 'yaddi yadda' *
I only have two soundfonts to worry about - but I guess they get paged on
demand, too.
>
> liulk
-- Peter
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