diff options
Diffstat (limited to 'examples/3-controlchanges.csd')
| -rw-r--r-- | examples/3-controlchanges.csd | 31 |
1 files changed, 21 insertions, 10 deletions
diff --git a/examples/3-controlchanges.csd b/examples/3-controlchanges.csd index 93749b1..f2ae31d 100644 --- a/examples/3-controlchanges.csd +++ b/examples/3-controlchanges.csd @@ -3,6 +3,12 @@ -odac -m0 </CsOptions> <CsInstruments> +/* + csound-opl example 3 + Control change, pitch bend, bank change and patch change with randomly selected patches + + Richard Knight 2021 : examples are licensed as public domain equivalent : http://unlicense.org/ +*/ sr = 44100 kr = 4410 @@ -10,40 +16,45 @@ nchnls = 2 0dbfs = 1 seed 0 +; do bank changes: causes device reset which will stop current notes/possibly cause clicks but demonstrates nonetheless +gichangebank = 0 +gistartbank = 0 + +; loop through each bank and play a note or two for each instr main giopl, aL, aR opl outs aL, aR gSbanks[] oplbanknames giopl - index = 0 itime = 0 inote = 0 inotes[] fillarray 50, 52, 64, 56, 53, 59, 62 - while (index < lenarray(gSbanks)) do - event_i "i", "play", itime, 2, index, inotes[inote], 0 + while (gistartbank < lenarray(gSbanks)) do + event_i "i", "play", itime, 2, gistartbank, inotes[inote], 0 if (inote < lenarray(inotes)-1) then inote += 1 else inote = 0 endif if (random(0, 1) > 0.5) then - event_i "i", "play", itime+0.5, 0.5, index, inotes[inote], 1 + event_i "i", "play", itime+0.5, 0.5, gistartbank, inotes[inote], 1 endif itime += 1 - index += 1 + gistartbank += 1 od p3 = itime endin +; set the patch, play the note, optionally set the bank and call the control change instrument instr play ibank = p4 inote = p5 ichannel = p6 ipatch random 0, 127 - prints sprintf("%d-%d (%s)\n", ibank, ipatch, gSbanks[ibank]) - if (ichannel == 0) then + if (ichannel == 0 && gichangebank = 1) then + prints sprintf("%d-%d (%s)\n", ibank, ipatch, gSbanks[ibank]) oplsetbank giopl, ibank endif oplpatchchange giopl, ichannel, ipatch @@ -52,6 +63,7 @@ instr play endin +; conditionally add a pitch bend and control change instr cc ichannel = p4 if (random(0, 1) > 0.6) then @@ -60,8 +72,8 @@ instr cc oplpitchbend giopl, ichannel, kbend endif - - if (random(0, 1) > 0.6) then + ; control change for type 1 (modulation) + if (random(0, 1) > 0.4) then kmod linseg 0, p3*0.7, 255, p3*0.3, 0 oplcontrolchange giopl, ichannel, 1, kmod endif @@ -69,7 +81,6 @@ endin </CsInstruments> -; ============================================== <CsScore> i"main" 0 3600 </CsScore> |