sfpreset — Assigns an existing preset of a SoundFont2 (SF2) sample file to an index number.
Assigns an existing preset of a previously loaded SoundFont2 (SF2) sample file to an index number. These opcodes allow management the sample-structure of SF2 files. In order to understand the usage of these opcodes, the user must have some knowledge of the SF2 format, so a brief description of this format can be found in the SoundFont2 File Format Appendix.
sfpreset should be placed in the header section of a Csound orchestra.
ir -- output to be used by other SF2 opcodes. For sfpreset, ir is ipreindex.
iprog -- program number of a bank of presets in a SF2 file
ibank -- number of a specific bank of a SF2 file
ifilhandle -- unique number generated by sfload opcode to be used as an identifier for a SF2 file. Several SF2 files can be loaded and activated at the same time.
ipreindex -- preset index
sfpreset assigns an existing preset of a previously loaded SF2 file to an index number, to be used later with the opcodes sfplay and sfplaym. The user must previously know the program and the bank numbers of the preset in order to fill the corresponding arguments. Any number of sfpreset instances can be placed in the header section of an orchestra, each one assigning a different preset belonging to the same (or different) SF2 file to different index numbers.
These opcodes only support the sample structure of SF2 files. The modulator structure of the SoundFont2 format is not supported in Csound. Any modulation or processing to the sample data is left to the Csound user, bypassing all restrictions forced by the SF2 standard.
Here is an example of the sfpreset opcode. It uses the file sfpreset.csd.
Example 816. Example of the sfpreset 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 -+rtmidi=virtual -M0 ;;;realtime audio out, virtual midi in ;-iadc ;;;uncomment -iadc if RT audio input is needed too ; For Non-realtime ouput leave only the line below: ; -o sfpreset.wav -W ;;; for file output any platform </CsOptions> <CsInstruments> sr = 44100 ksmps = 32 nchnls = 2 0dbfs = 1 gisf1 sfload "sf_GMbank.sf2" sfplist gisf1 ;list presets of first soundfont gisf2 sfload "07AcousticGuitar.sf2" sfplist gisf2 ;list presets of second soundfont gir sfpreset 50, 0, gisf1, 0 ;assign Synth Strings to index 0 giv sfpreset 0, 0, gisf2, 1 ;assign AcousticGuitar to index 1 print gir print giv instr 1 ; play from score and midi keyboard mididefault 60, p3 midinoteonkey p4, p5 inum init p4 ivel init p5 ivel init ivel/127 ;make velocity dependent kamp linsegr 1, 1, 1, .1, 0 kamp = kamp/5000 ;scale amplitude kfreq init 1 ;do not change freq from sf a1,a2 sfplay3 ivel, inum, kamp*ivel, kfreq, p6 outs a1, a2 endin </CsInstruments> <CsScore> f0 60 ; stay active for 1 minute i1 0 1 60 127 0 ;= Synth Strings I from first soundfont i1 + 1 62 < . i1 + 1 65 < . i1 + 1 69 10 . i1 5 1 60 127 1 ;= AcousticGuitar from second soundfont i1 + 1 62 < . i1 + 1 65 < . i1 + 1 69 10 . e </CsScore> </CsoundSynthesizer>