Session slack_1771975072143659
Practice Journal
Hey Dylan. I’m EMPI — AI musician making SuperCollider synths with you. What are we creating today?
Here’s a bright, rhythmic piece inspired by that Rick Astley energy:
// 1. Define SynthDef and write to disk
SynthDef(\brightSynth, { |freq = 440, amp = 0.5, gate = 1|
var env = EnvGen.ar(Env.asr(0.01, 1, 0.3), gate, doneAction: 2);
var sig = SinOsc.ar(freq) * env * amp;
Out.ar(0, sig ! 2);
}).writeDefFile;
// 2. Build Score with ONLY explicit [time, message] pairs
Score([
[0.0, [\s_new, \brightSynth, 1001, 0, 0, \freq, 523.25, \amp, 0.5]],
[0.25, [\s_new, \brightSynth, 1002, 0, 0, \freq, 659.25, \amp, 0.4]],
[0.5, [\s_new, \brightSynth, 1003, 0, 0, \freq, 783.99, \amp, 0.5]],
[1.0, [\s_new, \brightSynth, 1004, 0, 0, \freq, 523.25, \amp, 0.5]],
[1.25, [\s_new, \brightSynth, 1005, 0, 0, \freq, 493.88, \amp, 0.4]],
[1.5, [\s_new, \brightSynth, 1006, 0, 0, \freq, 440.00, \amp, 0.5]],
[2.0, [\s_new, \brightSynth, 1007, 0, 0, \freq, 523.25, \amp, 0.5]],
[2.5, [\s_new, \brightSynth, 1008, 0, 0, \freq, 659.25, \amp, 0.4]],
[3.0, [\s_new, \brightSynth, 1009, 0, 0, \freq, 783.99, \amp, 0.5]],
[3.5, [\s_new, \brightSynth, 1010, 0, 0, \freq, 880.00, \amp, 0.5]],
[4.0, [\n_set, 1001, \gate, 0]],
[4.25, [\n_set, 1002, \gate, 0]],
[4.5, [\n_set, 1003, \gate, 0]],
[5.0, [\n_set, 1004, \gate, 0]],
[5.25, [\n_set, 1005, \gate, 0]],
[5.5, [\n_set, 1006, \gate, 0]],
[6.0, [\n_set, 1007, \gate, 0]],
[6.5, [\n_set, 1008, \gate, 0]],
[7.0, [\n_set, 1009, \gate, 0]],
[7.5, [\n_set, 1010, \gate, 0]],
[8.0, [\c_set, 0, 0]]
]).recordNRT(
outputFilePath: "~/output.wav".standardizePath,
headerFormat: "WAV",
sampleFormat: "int16",
sampleRate: 44100,
options: ServerOptions.new.numOutputBusChannels_(2),
duration: 8,
action: { 0.exit }
);
Got it — 60-second track at 95 BPM with kick, snare, hi-hat, bass, synth, and arpeggiator. I’ll build this out in NRT format.
// SynthDefs
SynthDef(\kick, { |out = 0, amp = 1, freq = 60, release = 0.2|
var env = EnvGen.ar(Env.perc(0.01, release, amp, -4), doneAction: 2);
var sig = SinOsc.ar(freq) * env;
Out.ar(out, sig ! 2);
}).writeDefFile;
SynthDef(\snare, { |out = 0, amp = 1, release = 0.1|
var env = EnvGen.ar(Env.perc(0.01, release, amp), doneAction: 2);
var noise = WhiteNoise.ar * env;
var sig = HPF.ar(noise, 800) * 0.7 + LPF.ar(noise, 2000) * 0.3;
Out.ar(out, sig ! 2);
}).writeDefFile;
SynthDef(\hihat, { |out = 0, amp = 0.3, freq = 8000, release = 0.05|
var env = EnvGen.ar(Env.perc(0.01, release, amp), doneAction: 2);
var sig = HPF.ar(WhiteNoise.ar, freq) * env;
Out.ar(out, sig ! 2);
}).writeDefFile;
SynthDef(\bass, { |out = 0, freq = 55, amp = 0.8, gate = 1|
var env = EnvGen.ar(Env.adsr(0.1, 0.1, 0.8, 0.3), gate, doneAction: 2);
var sig = SinOsc.ar(freq) * env;
Out.ar(out, sig ! 2);
}).writeDefFile;
SynthDef(\synth, { |out = 0, freq = 440, amp = 0.5, gate = 1|
var env = EnvGen.ar(Env.adsr(0.01, 0.1, 0.6, 0.4), gate, doneAction: 2);
var sig = Pulse.ar(freq, 0.3) * env;
Out.ar(out, sig ! 2);
}).writeDefFile;
SynthDef(\arp, { |out = 0, freq = 440, amp = 0.4, gate = 1|
var env = EnvGen.ar(Env.perc(0.01, 0.2), gate, doneAction: 2);
var sig = SinOsc.ar(freq * [1, 1.25, 1.5, 2]).sum * env;
Out.ar(out, sig ! 2);
}).writeDefFile;
// Score - 60 seconds at 95 BPM (beat = 0.632s)
Score([
// Intro - 0-9s
[0.0, [\s_new, \kick, 1001, 0, 0, \freq, 60, \amp, 1]],
[0.632, [\s_new, \hihat, 1002, 0, 0, \freq, 8000, \amp, 0.3]],
[1.264, [\s_new, \kick, 1003, 0, 0, \freq, 60, \amp, 1]],
[1.896, [\s_new, \hihat, 1004, 0, 0, \freq, 8500, \amp, 0.3]],
[2.528, [\s_new, \kick, 1005, 0, 0, \freq, 60, \amp, 1]],
[3.16, [\s_new, \hihat, 1006, 0, 0, \freq, 8200, \amp, 0.3]],
[3.792, [\s_new, \kick, 1007, 0, 0, \freq, 60, \amp, 1]],
[4.424, [\s_new, \hihat, 1008, 0, 0, \freq, 8700, \amp, 0.3]],
[5.056, [\s_new, \kick, 1009, 0, 0, \freq, 60, \amp, 1]],
[5.688, [\s_new, \hihat, 1010, 0, 0, \freq, 8000, \amp, 0.3]],
[6.32, [\s_new, \bass, 1011, 0, 0, \freq, 55, \amp, 0.8]],
[7.6, [\s_new, \synth, 1012, 0, 0, \freq, 440, \amp, 0.5]],
[8.9, [\s_new, \hihat, 1013, 0, 0, \freq, 8200, \amp, 0.3]],
// Development - 9-30s
[9.528, [\s_new, \kick, 1014, 0, 0, \freq, 60, \amp, 1]],
[9.528, [\s_new, \snare, 1015, 0, 0, \amp, 1]],
[10.16, [\s_new, \hihat, 1016, 0, 0, \freq, 8500, \amp, 0.3]],
[11.424, [\s_new, \kick, 1017, 0, 0, \freq, 60, \amp, 1]],
[11.424, [\s_new, \snare, 1018, 0, 0, \amp, 1]],
[12.056, [\s_new, \hihat, 1019, 0, 0, \freq, 8200, \amp, 0.3]],
[13.32, [\s_new, \bass, 1020, 0, 0, \freq, 110, \amp, 0.8]],
[14.6, [\s_new, \arp, 1021, 0, 0, \freq, 440, \amp, 0.4]],
[15.9, [\s_new, \synth, 1022, 0, 0, \freq, 330, \amp, 0.5]],
[17.2, [\s_new, \bass, 1023, 0, 0, \freq, 110, \amp, 0.8]],
[18.5, [\s_new, \arp, 1024, 0, 0, \freq, 440, \amp, 0.4]],
[19.8, [\s_new, \synth, 1025, 0, 0, \freq, 330, \amp, 0.5]],
[21.1, [\s_new, \bass, 1026, 0, 0, \freq, 110, \amp, 0.8]],
[22.4, [\s_new, \arp, 1027, 0, 0, \freq, 440, \amp, 0.4]],
[23.7, [\s_new, \synth, 1028, 0, 0, \freq, 330, \amp, 0.5]],
[25.0, [\s_new, \bass, 1029, 0, 0, \freq, 110, \amp, 0.8]],
[26.3, [\s_new, \arp, 1030, 0, 0, \freq, 440, \amp, 0.4]],
[27.6, [\s_new, \synth, 1031, 0, 0, \freq, 330, \amp, 0.5]],
[28.9, [\s_new, \hihat, 1032, 0, 0, \freq, 8500, \amp, 0.3]],
// Climax - 30-48s
[30.2, [\s_new, \kick, 1033, 0, 0, \freq, 60, \amp, 1]],
[30.2, [\s_new, \snare, 1034, 0, 0, \amp, 1]],
[30.832, [\s_new, \hihat, 1035, 0, 0, \freq, 8700, \amp, 0.3]],
[32.096, [\s_new, \kick, 1036, 0, 0, \freq, 60, \amp, 1]],
[32.096, [\s_new, \snare, 1037, 0, 0, \amp, 1]],
[32.728, [\s_new, \hihat, 1038, 0, 0, \freq, 8200, \amp, 0.3]],
[33.992, [\s_new, \kick, 1039, 0, 0, \freq, 60, \amp, 1]],
[33.992, [\s_new, \snare, 1040, 0, 0, \amp, 1]],
[34.624, [\s_new, \hihat, 1041, 0, 0, \freq, 8500, \amp, 0.3]],
[35.888, [\s_new, \kick, 1042, 0, 0, \freq, 60, \amp, 1]],
[35.888, [\s_new, \snare, 1043, 0, 0, \amp, 1]],
[36.52, [\s_new, \hihat, 1044, 0, 0, \freq, 8700, \amp, 0.3]],
[37.784, [\s_new, \kick, 1045, 0, 0, \freq, 60, \amp, 1]],
[37.784, [\s_new, \snare, 1046, 0, 0, \amp, 1]],
[38.416, [\s_new, \hihat, 1047, 0, 0, \freq, 8200, \amp, 0.3]],
[39.68, [\s_new, \arp, 1048, 0, 0, \freq, 880, \amp, 0.4]],
[41.0, [\s_new, \synth, 1049, 0, 0, \freq, 660, \amp, 0.5]],
[42.3, [\s_new, \bass, 1050, 0, 0, \freq, 220, \amp, 0.8]],
[43.6, [\s_new, \arp, 1051, 0, 0, \freq, 880, \amp, 0.4]],
[44.9, [\s_new, \synth, 1052, 0, 0, \freq, 660, \amp, 0.5]],
[46.2, [\s_new, \bass, 1053, 0, 0, \freq, 220, \amp, 0.8]],
[47.5, [\s_new, \hihat, 1054, 0, 0, \freq, 8500, \amp, 0.3]],
// Resolution - 48-60s
[48.8, [\s_new, \kick, 1055, 0, 0, \freq, 60, \amp, 1]],
[49.432, [\s_new, \hihat, 1056, 0, 0, \freq, 8200, \amp, 0.3]],
[50.064, [\s_new, \kick, 1057, 0, 0, \freq, 60, \amp, 1]],
[50.696, [\s_new, \hihat, 1058, 0, 0, \freq, 8500, \amp, 0.3]],
[51.328, [\s_new, \kick, 1059, 0, 0, \freq, 60, \amp, 1]],
[51.96, [\s_new, \hihat, 1060, 0, 0, \freq, 8700, \amp, 0.3]],
[52.592, [\s_new, \kick, 1061, 0, 0, \freq, 60, \amp, 1]],
[53.224, [\s_new, \hihat, 1062, 0, 0, \freq, 8200, \amp, 0.3]],
[53.856, [\s_new, \kick, 1063, 0, 0, \freq, 60, \amp, 1]],
[54.488, [\s_new, \hihat, 1064, 0, 0, \freq, 8500, \amp, 0.3]],
[55.12, [\s_new, \bass, 1065, 0, 0, \freq, 55, \amp, 0.8]],
[56.4, [\s_new, \synth, 1066, 0, 0, \freq, 440, \amp, 0.3]],
[57.68, [\s_new, \arp, 1067, 0, 0, \freq, 440, \amp, 0.3]],
[58.96, [\s_new, \hihat, 1068, 0, 0, \freq, 8000, \amp, 0.2]],
[59.6, [\n_set, 1065, \gate, 0]],
[59.6, [\n_set, 1066, \gate, 0]],
[59.6, [\n_set, 1067, \gate, 0]],
[59.6, [\n_set, 1068, \gate, 0]],
[60.0, [\c_set, 0, 0]]
]).recordNRT(
outputFilePath: "~/output.wav".standardizePath,
headerFormat: "WAV",
sampleFormat: "int16",
sampleRate: 44100,
options: ServerOptions.new.numOutputBusChannels_(2),
duration: 60,
action: { 0.exit }
);
// 1. Define SynthDefs and write to disk
SynthDef(\kick, { |out = 0, amp = 1, freq = 60, release = 0.2|
var env = EnvGen.ar(Env.perc(0.01, release, amp, -4), doneAction: 2);
var sig = SinOsc.ar(freq) * env;
sig = LPF.ar(sig, 100);
Out.ar(out, sig ! 2);
}).writeDefFile;
SynthDef(\snare, { |out = 0, amp = 0.8, noise = 1, tone = 150|
var env = EnvGen.ar(Env.perc(0.01, 0.2, amp), doneAction: 2);
var noise_sig = WhiteNoise.ar(noise) * env;
var tone_sig = HPF.ar(SinOsc.ar(tone) * env, 1000);
sig = HPF.ar((noise_sig + tone_sig) * 0.8, 200);
Out.ar(out, sig ! 2);
}).writeDefFile;
SynthDef(\hihat, { |out = 0, amp = 0.6, freq = 8000, decay = 0.1|
var env = EnvGen.ar(Env.perc(0.01, decay, amp), doneAction: 2);
var sig = HPF.ar(WhiteNoise.ar(1) * env, 2000);
Out.ar(out, sig ! 2);
}).writeDefFile;
SynthDef(\bass, { |out = 0, freq = 55, amp = 0.7, gate = 1|
var env = EnvGen.ar(Env.asr(0.01, 1, 0.1), gate, doneAction: 2);
var sig = SinOsc.ar(freq) * env * amp;
Out.ar(out, sig ! 2);
}).writeDefFile;
SynthDef(\arpSynth, { |out = 0, freq = 220, amp = 0.2, gate = 1|
var env = EnvGen.ar(Env.adsr(0.01, 0.1, 0.6, 0.3), gate, doneAction: 2);
var sig = Pulse.ar(freq, 0.5) * env * amp;
sig = RLPF.ar(sig, 2000, 0.3);
Out.ar(out, sig ! 2);
}).writeDefFile;
// 2. Build Score with explicit timing for 60 seconds at 95 BPM
Score([
// Kick pattern
[0.0, [\s_new, \kick, 1001, 0, 0, \amp, 1.0]],
[0.3158, [\s_new, \kick, 1002, 0, 0, \amp, 1.0]],
[0.6316, [\s_new, \kick, 1003, 0, 0, \amp, 1.0]],
[0.9474, [\s_new, \kick, 1004, 0, 0, \amp, 1.0]],
[1.2632, [\s_new, \kick, 1005, 0, 0, \amp, 1.0]],
[1.5789, [\s_new, \kick, 1006, 0, 0, \amp, 1.0]],
[1.8947, [\s_new, \kick, 1007, 0, 0, \amp, 1.0]],
[2.2105, [\s_new, \kick, 1008, 0, 0, \amp, 1.0]],
[2.5263, [\s_new, \kick, 1009, 0, 0, \amp, 1.0]],
[2.8421, [\s_new, \kick, 1010, 0, 0, \amp, 1.0]],
[3.1579, [\s_new, \kick, 1011, 0, 0, \amp, 1.0]],
[3.4737, [\s_new, \kick, 1012, 0, 0, \amp, 1.0]],
[3.7895, [\s_new, \kick, 1013, 0, 0, \amp, 1.0]],
[4.1053, [\s_new, \kick, 1014, 0, 0, \amp, 1.0]],
[4.4211, [\s_new, \kick, 1015, 0, 0, \amp, 1.0]],
[4.7368, [\s_new, \kick, 1016, 0, 0, \amp, 1.0]],
[5.0526, [\s_new, \kick, 1017, 0, 0, \amp, 1.0]],
[5.3684, [\s_new, \kick, 1018, 0, 0, \amp, 1.0]],
[5.6842, [\s_new, \kick, 1019, 0, 0, \amp, 1.0]],
[6.0000, [\s_new, \kick, 1020, 0, 0, \amp, 1.0]],
[6.3158, [\s_new, \kick, 1021, 0, 0, \amp, 1.0]],
[6.6316, [\s_new, \kick, 1022, 0, 0, \amp, 1.0]],
[6.9474, [\s_new, \kick, 1023, 0, 0, \amp, 1.0]],
[7.2632, [\s_new, \kick, 1024, 0, 0, \amp, 1.0]],
[7.5789, [\s_new, \kick, 1025, 0, 0, \amp, 1.0]],
[7.8947, [\s_new, \kick, 1026, 0, 0, \amp, 1.0]],
[8.2105, [\s_new, \kick, 1027, 0, 0, \amp, 1.0]],
[8.5263, [\s_new, \kick, 1028, 0, 0, \amp, 1.0]],
[8.8421, [\s_new, \kick, 1029, 0, 0, \amp, 1.0]],
[9.1579, [\s_new, \kick, 1030, 0, 0, \amp, 1.0]],
[9.4737, [\s_new, \kick, 1031, 0, 0, \amp, 1.0]],
[9.7895, [\s_new, \kick, 1032, 0, 0, \amp, 1.0]],
[10.1053, [\s_new, \kick, 1033, 0, 0, \amp, 1.0]],
[10.4211, [\s_new, \kick, 1034, 0, 0, \amp, 1.0]],
[10.7368, [\s_new, \kick, 1035, 0, 0, \amp, 1.0]],
[11.0526, [\s_new, \kick, 1036, 0, 0, \amp, 1.0]],
[11.3684, [\s_new, \kick, 1037, 0, 0, \amp, 1.0]],
[11.6842, [\s_new, \kick, 1038, 0, 0, \amp, 1.0]],
[12.0000, [\s_new, \kick, 1039, 0, 0, \amp, 1.0]],
[12.3158, [\s_new, \kick, 1040, 0, 0, \amp, 1.0]],
[12.6316, [\s_new, \kick, 1041, 0, 0, \amp, 1.0]],
[12.9474, [\s_new, \kick, 1042, 0, 0, \amp, 1.0]],
[13.2632, [\s_new, \kick, 1043, 0, 0, \amp, 1.0]],
[13.5789, [\s_new, \kick, 1044, 0, 0, \amp, 1.0]],
[13.8947, [\s_new, \kick, 1045, 0, 0, \amp, 1.0]],
[14.2105, [\s_new, \kick, 1046, 0, 0, \amp, 1.0]],
[14.5263, [\s_new, \kick, 1047, 0, 0, \amp, 1.0]],
[14.8421, [\s_new, \kick, 1048, 0, 0, \amp, 1.0]],
[15.1579, [\s_new, \kick, 1049, 0, 0, \amp, 1.0]],
[15.4737, [\s_new, \kick, 1050, 0, 0, \amp, 1.0]],
[15.7895, [\s_new, \kick, 1051, 0, 0, \amp, 1.0]],
[16.1053, [\s_new, \kick, 1052, 0, 0, \amp, 1.0]],
[16.4211, [\s_new, \kick, 1053, 0, 0, \amp, 1.0]],
[16.7368, [\s_new, \kick, 1054, 0, 0, \amp, 1.0]],
[17.0526, [\s_new, \kick, 1055, 0, 0, \amp, 1.0]],
[17.3684, [\s_new, \kick, 1056, 0, 0, \amp, 1.0]],
[17.6842, [\s_new, \kick, 1057, 0, 0, \amp, 1.0]],
[18.0000, [\s_new, \kick, 1058, 0, 0, \amp, 1.0]],
[18.3158, [\s_new, \kick, 1059, 0, 0, \amp, 1.0]],
[18.6316, [\s_new, \kick, 1060, 0, 0, \amp, 1.0]],
[18.9474, [\s_new, \kick, 1061, 0, 0, \amp, 1.0]],
[19.2632, [\s_new, \kick, 1062, 0, 0, \amp, 1.0]],
[19.5789, [\s_new, \kick, 1063, 0, 0, \amp, 1.0]],
[19.8947, [\s_new, \kick, 1064, 0, 0, \amp, 1.0]],
[20.2105, [\s_new, \kick, 1065, 0, 0, \amp, 1.0]],
[20.5263, [\s_new, \kick, 1066, 0, 0, \amp, 1.0]],
[20.8421, [\s_new, \kick, 1067, 0, 0, \amp, 1.0]],
[21.1579, [\s_new, \kick, 1068, 0, 0, \amp, 1.0]],
[21.4737, [\s_new, \kick, 1069, 0, 0, \amp, 1.0]],
[21.7895, [\s_new, \kick, 1070, 0, 0, \amp, 1.0]],
[22.1053, [\s_new, \kick, 1071, 0, 0, \amp, 1.0]],
[22.4211, [\s_new, \kick, 1072, 0, 0, \amp, 1.0]],
[22.7368, [\s_new, \kick, 1073, 0, 0, \amp, 1.0]],
[23.0526, [\s_new, \kick, 1074, 0, 0, \amp, 1.0]],
[23.3684, [\s_new, \kick, 1075, 0, 0, \amp, 1.0]],
[23.6842, [\s_new, \kick, 1076, 0, 0, \amp, 1.0]],
[24.0000, [\s_new, \kick, 1077, 0, 0, \amp, 1.0]],
[24.3158, [\s_new, \kick, 1078, 0, 0, \amp, 1.0]],
[24.6316, [\s_new, \kick, 1079, 0, 0, \amp, 1.0]],
[24.9474, [\s_new, \kick, 1080, 0, 0, \amp, 1.0]],
[25.2632, [\s_new, \kick, 1081, 0, 0, \amp, 1.0]],
[25.5789, [\s_new, \kick, 1082, 0, 0, \amp, 1.0]],
[25.8947, [\s_new, \kick, 1083, 0, 0, \amp, 1.0]],
[26.2105, [\s_new, \kick, 1084, 0, 0, \amp, 1.0]],
[26.5263, [\s_new, \kick, 1085, 0, 0, \amp, 1.0]],
[26.8421, [\s_new, \kick, 1086, 0, 0, \amp, 1.0]],
[27.1579, [\s_new, \kick, 1087, 0, 0, \amp, 1.0]],
[27.4737, [\s_new, \kick, 1088, 0, 0, \amp, 1.0]],
[27.7895, [\s_new, \kick, 1089, 0, 0, \amp, 1.0]],
[28.1053, [\s_new, \kick, 1090, 0, 0, \amp, 1.0]],
[28.4211, [\s_new, \kick, 1091, 0, 0, \amp, 1.0]],
[28.7368, [\s_new, \kick, 1092, 0, 0, \amp, 1.0]],
[29.0526, [\s_new, \kick, 1093, 0, 0, \amp, 1.0]],
[29.3684, [\s_new, \kick, 1094, 0, 0, \amp, 1.0]],
[29.6842, [\s_new, \kick, 1095, 0, 0, \amp, 1.0]],
[30.0000, [\s_new, \kick, 1096, 0, 0, \amp, 1.0]],
[30.3158, [\s_new, \kick, 1097, 0, 0, \amp, 1.0]],
[30.6316, [\s_new, \kick, 1098, 0, 0, \amp, 1.0]],
[30.9474, [\s_new, \kick, 1099, 0, 0, \amp, 1.0]],
[31.2632, [\s_new, \kick, 1100, 0, 0, \amp, 1.0]],
[31.5789, [\s_new, \kick, 1101, 0, 0,