Wednesday, April 1, 2009

Using BBCut and a Simple Drum Machine

I've had this code for ages but I forgot about it. 
It's my simple drum machine again, but this time put through BBCut, the beat slicing library. I've got to admit, it doesn't sound too good yet, but the principle's there.

Also it's yet another experiment with formatting, I'll find a something that works one day.
s.boot

(
SynthDef(\drums, {|out = 0, bassLevel = 0,
snareLevel = 0, hatLevel = 0, tomLevel = 0,
pan1 = 0, pan2 = 0, pan3 = 0, pan4 = 0|

var env1, env2, env3, bass, snare, hat, tom, bassOut, snareOut,
hatOut, tomOut, mixer;
env1 = EnvGen.kr(Env.perc(0.001, 0.2, 1, -4), 1, doneAction:2);
env2 = EnvGen.kr(Env.perc(0.002, 0.3, 1, -2), 1, doneAction:2);
env3 = EnvGen.kr(Env.perc(0.001, 0.1, 1, -5), 1, doneAction:2);
bass = SinOsc.ar(80) + Crackle.ar(1, 0.5);
bassOut = Pan2.ar(bass*env1, pan1, bassLevel);

snare = SinOsc.ar(40) - WhiteNoise.ar(0.5, 0.5);
snareOut = Pan2.ar(snare*env1, pan2, snareLevel);

hat = Klank.ar(`[ [ 6563, 9875 ],
[ 0.61, 0.55046827363918 ],
[ 0.0024, 0.0036 ] ], PinkNoise.ar(1));
hatOut = Pan2.ar(hat*env2, pan2, hatLevel);

tom = SinOsc.ar(440);
tomOut = Pan2.ar(tom*env3, pan4, tomLevel);

mixer = (bassOut + snareOut) + (hatOut + tomOut);


Out.ar(out, mixer);

}).store

)

TempoClock.default.tempo_(3);

(
var buf, clock, bbcutgroup;
~synthbus = Bus.audio(s,2);
~synthgroup= Group.head(Node.basicNew(s,1));

a = Pseq ([1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0]);
b = Pseq ([0, 0, 1, 0, 0, 1, 0, 0, 1, 0, 1, 0, 0, 1, 0, 0]);
c = Pseq ([0, 0, 0, 0, 0, 0, 1, 0, 1, 0, 0, 0, 0, 0, 1, 0]);
d = Pseq ([0, 0, 0, 1, 0, 0, 1, 0, 1, 0, 0, 1, 0, 0, 0, 1]);

p = Pbind(
\instrument, \drums,
\dur, 0.2,
\bassLevel, Pseq ([a], inf),
\snareLevel, Pseq ([b], inf),
\hatLevel, Pseq ([c], inf),
\tomLevel, Pseq ([d], inf),
\group, ~synthgroup,
\out, ~synthbus
).play;

clock= ExternalClock(TempoClock.default);

bbcutgroup= Group.after(~synthgroup);

Routine.run({
buf= BBCutBuffer.alloc(s,44100,2);
s.sync; //this forces a wait for the Buffer to be allocated
BBCut2(CutGroup(CutStream1(~synthbus.index, buf, 0.75, 0.01, 0.5,
-4),bbcutgroup, numChannels:2), SQPusher1.new).play(clock);
});
clock.play;
)
~synthbus.free;






The code is not to hard to follow I hope, it's adapted from the BBcut help file with help from Dan once again. The only tough bits are the groups and nodes stuff, which to be honest I don't fully understand myself. Maybe I'll post about them in more detail if I ever fathom it.

1 comment:

  1. I love the drum, i think this instrument is very notable, i usually feel too much energy when i listen or i touch a drum although be a short time. Is absolutely wonderful.

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    ReplyDelete