Osc

Description

Linear interpolating wavetable lookup oscillator with frequency and phase modulation inputs.

This oscillator requires a buffer to be filled with a wavetable format signal. This preprocesses the Signal into a form which can be used efficiently by the Oscillator. The buffer size must be a power of 2.

This can be acheived by creating a Buffer object and sending it one of the "b_gen" messages ( Buffer: -sine1, Buffer: -sine2, Buffer: -sine3 ) with the wavetable flag set to true.

This can also be achieved by creating a Signal object and sending it the 'asWavetable' message, thereby creating a Wavetable object in the required format. Then, the wavetable data may be transmitted to the server using the Buffer: *sendCollection or Buffer: *loadCollection methods.

Class Methods

*ar (bufnum, freq = 440, phase = 0, mul = 1, add = 0)

*kr (bufnum, freq = 440, phase = 0, mul = 1, add = 0)

Inherited class methods

Instance Methods

Inherited instance methods

Examples

(
s = Server.local;
b = Buffer.alloc(s, 512, 1);
b.sine1(1.0/[1,2,3,4,5,6], true, true, true);

SynthDef("help-Osc",{ arg out=0,bufnum=0;
	Out.ar(out,
		Osc.ar(bufnum, 200, 0, 0.5)
	)
}).play(s,[\out, 0, \bufnum, b.bufnum]);
)

(
s = Server.local;
b = Buffer.alloc(s, 512, 1);
b.sine1(1.0/[1,2,3,4,5,6], true, true, true);

SynthDef("help-Osc",{ arg out=0,bufnum=0;
	Out.ar(out,
		Osc.ar(bufnum, XLine.kr(2000,200), 0, 0.5)// modulate freq
	)
}).play(s,[\out, 0, \bufnum, b.bufnum]);
)


(
s = Server.local;
b = Buffer.alloc(s, 512, 1);
b.sine1([1.0], true, true, true);

SynthDef("help-Osc",{ arg out=0,bufnum=0;
	Out.ar(out,
		Osc.ar(bufnum,
			Osc.ar(bufnum,
				XLine.kr(1,1000,9),
				0,
				200,
				800),
			0,
			0.25)
	)
}).play(s,[\out, 0, \bufnum, b.bufnum]);
)


(
// modulate phase
s = Server.local;
b = Buffer.alloc(s, 512, 1);
b.sine1([1.0], true, true, true);

SynthDef("help-Osc",{ arg out=0,bufnum=0;
	Out.ar(out,
		Osc.ar(bufnum,
				800,
				Osc.ar(bufnum,
						XLine.kr(20,8000,10),
						0,
						2pi),
				0.25)
	)
}).play(s,[\out, 0, \bufnum, b.bufnum]);
)



(
// change the buffer while its playing
s = Server.local;
b = Buffer.alloc(s, 4096, 1);
b.sine1(1.0/[1,2,3,4,5,6], true, true, true);

SynthDef("help-Osc",{ arg out=0,bufnum=0;
	Out.ar(out,
		Osc.ar(bufnum, [80,80.2], 0, 0.2)
	)
}).play(s,[\out, 0, \bufnum, b.bufnum]);
)

(
fork {
	var n = 32;
	50.do {
		b.sine1(Array.rand(n,0,1).cubed, true, true, true);
		0.25.wait;
	};
};
)