fluidSetInterpMethod — Set interpolation method for channel in Fluid 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
Set interpolation method for channel in Fluid Engine. Lower order interpolation methods will render faster at lower fidelity while higher order interpolation methods will render slower at higher fidelity. Default interpolation for a channel is 4th order interpolation.
ienginenum -- engine number assigned from fluidEngine
ichannelnum -- which channel number to use for the preset in the given fluidEngine
iInterpMethod -- interpolation method, can be any of the following
0 -- No Interpolation
1 -- Linear Interpolation
4 -- 4th Order Interpolation (Default)
7 -- 7th Order Interpolation (Highest)
Here is an example of the fluidSetInterpMethod opcode. It uses the file fluidSetInterpMethod.csd and 07AcousticGuitar.sf2.
Example 344. Example of the fluidSetInterpMethod opcode.
See the sections Real-time Audio and Command Line Flags for more information on using command line flags.
<CsoundSynthesizer> <CsOptions> ; Select audio/midi flags here according to platform -odac ;;;realtime audio out and realtime midi in ;-iadc ;;;uncomment -iadc if realtime audio input is needed too ; For Non-realtime ouput leave only the line below: ;-o fluidSetInterpMethod.wav -W ;;; for file output any platform </CsOptions> <CsInstruments> sr = 44100 ksmps = 32 nchnls = 2 0dbfs = 1 giengine fluidEngine ; soundfont path to manual/examples isfnum fluidLoad "07AcousticGuitar.sf2", giengine, 1 fluidProgramSelect giengine, 1, isfnum, 0, 0 instr 1 mididefault 60, p3 midinoteonkey p4, p5 ikey init p4 ivel init p5 iInterpMethod = p6 fluidSetInterpMethod giengine, 1, iInterpMethod fluidNote giengine, 1, ikey, ivel endin instr 99 imvol init 7 asigl, asigr fluidOut giengine outs asigl*imvol, asigr*imvol endin </CsInstruments> <CsScore> ;hear the difference i 1 0 2 60 120 0 ;no interpolation i 1 3 2 72 120 0 i 1 6 2 60 120 7 ;7th order interpolation i 1 9 2 72 120 7 i 99 0 12 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