+++ /dev/null
-
-/* A basic pd-pure pattern sequencing example. This Pure script generates the
- sequences played by the seqdemo.pd patch. */
-
-using math;
-
-/* Simple (monophonic) musical patterns with aleatoric elements represented as
- streams. */
-
-rand m::int = int (uint random/0x100000000*(m+1));
-rand (n::int,m::int)
- = rand (m-n) + n;
-
-/* Choose an element at random. */
-
-choose xs = (xs!rand (#xs-1));
-
-/* Concatenate a recursive pattern to a flat sequence. */
-
-mkseq [] = [];
-mkseq (x:xs) = catmap mkseq (x:xs);
-mkseq x = [x] otherwise;
-
-/* Sample patterns. pat1 is shamelessly pilfered from the SuperCollider
- documentation, pat2 is a finite section of pat1, and pat3 is a simple
- random C minor arpeggio. */
-
-pat1 = [[24, 31, 36, 43, 48, 55,
- [[60, choose [63, 65], 67, choose [70, 72, 74]] |
- i = 1..rand (2,5)],
- [choose [74, 75, 77, 79, 81] |
- i = 1..rand (3,8)]] |
- i = 1..inf];
-
-pat2 = [[24, 31, 36, 43, 48, 55,
- [[60, choose [63, 65], 67, choose [70, 72, 74]] |
- i = 1..rand (2,5)],
- [choose [74, 75, 77, 79, 81] |
- i = 1..rand (3,8)]] |
- i = 1..rand (2,5)];
-
-pat3 = [[60,60,choose [63,67]] | i = 1..inf];
-
-/* The sequencer object. */
-
-nonfix bang reset; // we respond to these
-nonfix stop note pan wet; // we generate these
-
-sequencer = process
-
-with
-
- /* Process events. Respond to the messages 'bang' (produce the next stream
- member), 'reset' (rewind the stream to the beginning), numbers (change
- the note duration a.k.a. delta time value) and a pattern (to switch
- patterns on the fly). Last but not least we also send back a 'stop'
- message when the stream ends (of course this will only happen if the
- sequence is finite). */
-
- process x::double
- = () when put dur x end;
- process pat@(_:_)
- = ()
- when pat = mkseq pat;
- put time 0; put ctr 0;
- put seq pat; put seq0 pat;
- end;
- process reset = () when put seq (get seq0); put time 0; end;
- process bang = case get seq of
- n:seq1 = event n when
- put seq seq1; put time (get dur);
- end;
- _ = stop;
- end;
- process _ = stop;
-
- /* Turn a stream member (a note number in this case) into a sequence of
- events (a.k.a. Pd messages). The sample event function below illustrates
- how to carry around some state (a running counter in this case) in order
- to implement some dynamic effects, and how to do random pitch, velocity
- and onset variations on the fly. Also note that here we return an entire
- "bundle" (i.e., list) of Pd messages for each pattern element. */
-
- event n = {// play a note on voice #2:
- t 2 note n 1 d,
- // vary the pan and wet controls of voice #2 in a periodic
- // fashion to simulate a sound source walking around in
- // circles:
- t 2 pan (0.4+0.3*u),
- t 2 wet (0.35+0.1*w),
- // play the same note, delayed by a small amount of time,
- // transposed down an octave and slightly detuned,
- // alternating between voice #1 and voice #3:
- (t+dt) (2*k+1) note (n-12+dn) v d}
- when i = getctr ctr; k = i mod 2;
- x = i mod 100/100*2*pi; u = cos x; w = sin x;
- t = get time; d = get dur; dt = rand (0,10);
- dn = rand (-20,20)/1000;
- v = rand (90,120)/100;
- end;
- getctr c = k when k = get c; put c (k+1) end;
-
-end
-
-when
- // initialize
- dur = ref 500; time = ref 0; ctr = ref 0;
- pat = mkseq pat1;
- seq = ref pat; seq0 = ref pat;
-end;
projects / Faustine.git / blobdiff