Subject: [linux-audio-dev] Re: Synth APIs, pitch control
From: Sami P Perttu (perttu_AT_cc.helsinki.fi)
Date: Wed Dec 11 2002 - 13:38:49 EET
> > a softstudio; it's pretty far already and
> > the first public release is scheduled Q1/2003.
>
> for Linux, obviously? ;-)
Yes. Linux, GPL. MONKEY is about 30.000 lines of C++ at the moment. I
still have to make a final architecture revision based on some issues
reading this list has evoked, and prepare the whole thing for release.
> > First, I don't understand why you want to design a "synth API". If you
> > want to play a note, why not instantiate a DSP network that does the job,
> > connect it to the main network (where system audio outs reside), run it
> > for a while and then destroy it? That is what events are in my system -
> > timed modifications to the DSP network.
>
> because a standard API is needed for a dynamically loaded plugins!
> LADSPA doesnt really cater for event-driven processes (synths)
Yes, I understand it now. In principle, audio and control ports could
almost suffice but sample-accurate events sent to plugins are more
efficient, and allow one to pass around structured data.
I shall have to add something like this to MONKEY. Right now it supports
LADSPA via a wrapper - the native API is pretty complex - although
creating a nice GUI based on just information in a LADSPA .so is not
possible, mainly due to lack of titles for enums.
> For a complete contrast, please look over
> http://amsynthe.sourceforge.net/amp_plugin.h which i am still toying
> with as a(nother) plugin api suitable for synths. I was hoping to wait
I like this better than the more complex proposal being worked on, except
that I don't much care for MIDI myself. But I also realize the need for
the event/channel/bay/voice monster because it is more efficient and
potentially doesn't require plugins to be instantiated while a song is
playing. I don't think one API can fit all sizes.
-- Sami Perttu "Flower chase the sunshine" Sami.Perttu_AT_hiit.fi http://www.cs.helsinki.fi/u/perttu
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