fluidControl — Sends MIDI note on, note off, and other messages to a SoundFont preset.
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
The fluid opcodes provide a simple Csound opcode wrapper around Peter Hanappe's Fluidsynth SoundFont2 synthesizer. This implementation accepts any MIDI note on, note off, controller, pitch bend, or program change message at k-rate. Maximum polyphony is 4096 simultaneously sounding voices. Any number of SoundFonts may be loaded and played simultaneously.
ienginenum -- engine number assigned from fluidEngine
imsgs -- if zero suppresses printing of messages when commands arrive. Default value is 1.
kstatus -- MIDI channel message status byte: 128 for note off, 144 for note on, 176 for control change, 192 for program change, or 224 for pitch bend.
kchannel -- MIDI channel number to which the Fluidsynth program is assigned: from 0 to 255. MIDI channels numbered 16 or higher are virtual channels.
kdata1 -- For note on, MIDI key number: from 0 (lowest) to 127 (highest), where 60 is middle C. For continuous controller messages, controller number.
kdata2 -- For note on, MIDI key velocity: from 0 (no sound) to 127 (loudest). For continous controller messages, controller value.
Invoke fluidControl in instrument definitions that actually play notes and send control messages. Each instrument definition must consistently use one MIDI channel that was assigned to a Fluidsynth program using fluidLoad.
In this implementation, SoundFont effects such as chorus or reverb are used if and only if they are defaults for the preset. There are some ways of turning effects chorus and reverb on or off using fluidEngine, and of changing some of their parameters with fluidCCi and fluidCCk.
Here is a more complex example of the fluidsynth opcodes written by Istvan Varga. Play fluidcomplex.csd
<CsoundSynthesizer> <CsOptions> ; Select audio/midi flags here according to platform ;Anna.mid is a midi file, a song by The Beatles and can be found on the internet -odac -T -F Anna.mid;;;realtime audio I/O and midifile in ;-iadc ;;;uncomment -iadc if realtime audio input is needed too ; For Non-realtime ouput leave only the line below: ; -o fluidcomplex.wav -W ;;; for file output any platform </CsOptions> <CsInstruments> sr = 44100 ksmps = 32 nchnls = 2 0dbfs = 1 ; Example by Istvan Varga ; disable triggering of instruments by MIDI events ichn = 1 lp1: massign ichn, 0 loop_le ichn, 1, 16, lp1 pgmassign 0, 0 ; initialize FluidSynth gifld fluidEngine gisf2 fluidLoad "sf_GMbank.sf2", gifld, 1 ; k-rate version of fluidProgramSelect opcode fluidProgramSelect_k, 0, kkkkk keng, kchn, ksf2, kbnk, kpre xin igoto skipInit doInit: fluidProgramSelect i(keng), i(kchn), i(ksf2), i(kbnk), i(kpre) reinit doInit rireturn skipInit: endop instr 1 ; initialize channels kchn init 1 if (kchn == 1) then lp2: fluidControl gifld, 192, kchn - 1, 0, 0 fluidControl gifld, 176, kchn - 1, 7, 100 fluidControl gifld, 176, kchn - 1, 10, 64 loop_le kchn, 1, 16, lp2 endif ; send any MIDI events received to FluidSynth nxt: kst, kch, kd1, kd2 midiin if (kst != 0) then if (kst != 192) then fluidControl gifld, kst, kch - 1, kd1, kd2 else fluidProgramSelect_k gifld, kch - 1, gisf2, 0, kd1 endif kgoto nxt endif ; get audio output from FluidSynth ivol init 3 ;a bit louder aL, aR fluidOut gifld outs aL*ivol, aR*ivol endin </CsInstruments> <CsScore> i 1 0 3600 e </CsScore> </CsoundSynthesizer>
fluidEngine, fluidNote, fluidLoad
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