fluidEngine — Instantiates a fluidsynth engine.
Plugin opcode in fluidOpcodes. This opcode is part of the plugin repository and has to be installed separately. The plugin repository can be found here: https://github.com/csound/plugins
Instantiates a fluidsynth engine, and returns ienginenum to identify the engine. ienginenum is passed to other other opcodes for loading and playing SoundFonts and gathering the generated sound.
ienginenum -- engine number assigned from fluidEngine.
iChorusEnabled -- optionally set to 0 to disable any chorus effect in the loaded SoundFonts.
iReverbEnabled -- optionally set to 0 to disable any reverb effect in the loaded SoundFonts.
iNumChannels -- number of channels to use; range is 16-256 and Csound default is 256 (Fluidsynth's default is 16).
iPolyphony -- number of voices to be played in parallel; range is 16-4096 and Csound default is 4096 (Fluidsynth's default is 256). Note: this is not the number of notes played at the same time as a single note may use create multiple voices depending on instrument zones and velocity/key of played note.
Here is example of the fluidsynth opcodes using 2 engines. It uses the file fluidEngine.csd and midichn_advanced.mid.
<CsoundSynthesizer> <CsOptions> ; Select audio/midi flags here according to platform -odac -F midichn_advanced.mid ;;;reatime audio out and midifile in ;-iadc ;;;uncomment -iadc if realtime audio input is needed too ; For Non-realtime ouput leave only the line below: ; -o fluidEngine.wav -W ;;; for file output any platform </CsOptions> <CsInstruments> sr = 44100 ksmps = 32 nchnls = 2 0dbfs = 1 ; LOAD SOUNDFONTS gienginenum1 fluidEngine gienginenum2 fluidEngine isfnum1 fluidLoad "sf_GMbank.sf2", gienginenum1, 1 ; Piano 2, program 1, channel 1 fluidProgramSelect gienginenum1, 1, isfnum1, 0, 1 ; Piano 3, program 2, channel 2 fluidProgramSelect gienginenum1, 2, isfnum1, 0, 2 isfnum2 fluidLoad "19Trumpet.sf2", gienginenum2, 1 ; Trumpet, program 56, channel 3 fluidProgramSelect gienginenum2, 3, isfnum2, 0, 56 ;Look for midifile in folder manual/examples ;"midichn_advanced.mid" sends notes to the soundfonts instr 1 ; GM soundfont ; INITIALIZATION mididefault 60, p3 ; Default duration of 60 -- overridden by score. midinoteonkey p4, p5 ; Channels MIDI input to pfields. ; Use channel assigned in fluidload. ichannel = 1 ikey = p4 ivelocity = p5 fluidNote gienginenum1, ichannel, ikey, ivelocity endin instr 2 ; GM soundfont ; INITIALIZATION mididefault 60, p3 ; Default duration of 60 -- overridden by score. midinoteonkey p4, p5 ; Channels MIDI input to pfields. ; Use channel assigned in fluidload. ichannel = 2 ikey = p4 ivelocity = p5 fluidNote gienginenum1, ichannel, ikey, ivelocity endin instr 3 ; Trumpet ; INITIALIZATION mididefault 60, p3 ; Default duration of 60 -- overridden by score. midinoteonkey p4, p5 ; Channels MIDI input to pfields. ; Use channel assigned in fluidload. ichannel = 3 ikey = p4 ivelocity = p5 fluidNote gienginenum2, ichannel, ikey, ivelocity endin ; COLLECT AUDIO FROM ALL SOUNDFONTS instr 100 ; Fluidsynth output iamplitude1 = 7 iamplitude2 = 7 ; AUDIO aleft1, aright1 fluidOut gienginenum1 aleft2, aright2 fluidOut gienginenum2 outs (aleft1 * iamplitude1) + (aleft2 * iamplitude2), \ (aright1 * iamplitude1) + (aright2 * iamplitude2) endin </CsInstruments> <CsScore> i 1 0 3 60 100 i 2 1 3 60 100 i 3 3 3 63 100 i 100 0 10 ;run for 10 seconds e </CsScore> </CsoundSynthesizer>
More information on soundfonts is in the Floss Manuals: https://flossmanual.csound.com/midi/reading-midi-files
For other information on soundfonts look in the Wikipedia: http://en.wikipedia.org/wiki/Soundfont