sfpassign
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## sfpassign

sfpassign — Assigns all presets of a SoundFont2 (SF2) sample file to a sequence of progressive index numbers.

## Description

Assigns all presets of a previously loaded SoundFont2 (SF2) sample file to a sequence of progressive index numbers. 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.

sfpassign should be placed in the header section of a Csound orchestra.

## Syntax

    sfpassign istartindex, ifilhandle[, imsgs]

## Initialization

istartindex -- starting index preset by the user in bulk preset assignments.

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.

imsgs -- if non-zero messages are suppressed.

## Performance

sfpassign assigns all presets of a previously loaded SF2 file to a sequence of progressive index numbers, to be used later with the opcodes sfplay and sfplaym. istartindex specifies the starting index number. Any number of sfpassign instances can be placed in the header section of an orchestra, each one assigning presets belonging to different SF2 files. The user must take care that preset index numbers of different SF2 files do not overlap.

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.

## Examples

Here is an example of the sfpassign opcode. It uses the file sfpassign.csd.

Example 734. Example of the sfpassign 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 sfpassign.wav -W ;;; for file output any platform
    </CsOptions>
    <CsInstruments>

    sr = 44100
    ksmps = 32
    nchnls = 2
    0dbfs  = 1

    ;load two soundfonts
    gisf	sfload	"07AcousticGuitar.sf2"
    gir	sfload	"01hpschd.sf2"
    	sfplist gisf
    	sfplist gir
    	sfpassign	0, gisf
    	sfpassign	1, gir

    instr 1	; play guitar from score and midi keyboard - preset index = 0

    	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, 0			;preset index = 0
    	outs	a1, a2

    	endin

    instr 2	; play harpsichord from score and midi keyboard - preset index = 1

    	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/1000						;scale amplitude
    kfreq	init	1						;do not change freq from sf
    a1,a2	sfplay3	ivel, inum, kamp*ivel, kfreq, 1			;preset index = 1
    	outs	a1, a2

    endin

    </CsInstruments>
    <CsScore>
    f0  60				; stay active for 1 minute

    i1 0 1 60 100
    i1 + 1 62 <
    i1 + 1 65 <
    i1 + 1 69 10

    i2 5 1 60 100
    i2 + 1 62 <
    i2 7 1 65 <
    i2 7 1 69 10

    e
    </CsScore>
    </CsoundSynthesizer>

## See Also

sfilist, sfinstr, sfinstrm, sfload, sfplay, sfplaym, sfplist, sfpreset

## Credits

Author: Gabriel Maldonado
Italy
May 2000

New in Csound Version 4.07

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