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 achieved 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.
| bufnum |
Buffer index. |
| freq |
Frequency in Hertz. |
| phase |
Phase offset or modulator in radians. (Note: phase values should be within the range +-8pi. If your phase values are larger then simply use |
| mul |
Output will be multiplied by this value. |
| add |
This value will be added to the output. |
(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 phases = 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 playings = 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; };};)