Re: [sc-users] Synth Definition Argument Control

[James Harkins <jamshark70@xxxxxxxxx>]

On Dec 30, 2005, at 1:02 AM, Esben Stien wrote:

> I'm unsure how to control the values of SynthDef arguments when the
> synth is not running.

The best technique is to write your control values onto control buses, 
then map the synth arguments to the buses each time you create a synth, 
e.g.,

~freq = Bus.control(s, 1).set(440);
~amp = Bus.control(s, 1).set(0.2);

Synth("tutorial-sine", [\freq, "c" ++ ~freq.index, \amp, "c" ++ 
~amp.index]);

GenericGlobalControl in my library offers some neat conveniences: 
automatic gui via .gui (with automatic association to a controlspec for 
range mapping) (guis are mac only at this time), playing synths onto 
the control and a .watch method so that the client-side value stays in 
sync, and easier construction of synth args.

// nil means assign me a control bus: you can give a bus number here if 
you want
// \freq is a shortcut to the predefined frequency controlspec: 
20..20000 mapped exponentially
~freq = GenericGlobalControl(\freq, nil, 440, \freq);
~amp = GenericGlobalControl(\amp, nil, 0.2, \amp);

Synth("tutorial-sine", [\freq, ~freq.asMapArg, \amp, ~amp.asMapArg]);

> I intend to bind such arguments to a midi controller.

My lib also has VoicerMIDIController which talks directly to 
GenericGlobalControls.

hjh

: H. James Harkins
: jamshark70@xxxxxxxxxxxxxxxxx
: http://www.dewdrop-world.net
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