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 section.

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.

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 969. 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 ;;;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>

    ; By  Menno Knevel - 2020

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

    ;load three soundfonts
    gisf	sfload	"sf_GMbank.sf2"
    gir	sfload	"01hpschd.sf2"
    giv	sfload	"07AcousticGuitar.sf2"
    	sfplist gisf
    	sfplist gir
            sfplist giv

    ; first, sf_GMbank.sf2 is loaded and assigned to start at 0 and counting up to 328
    ; as there are 329 presets in sf_GMbank.sf2.
    ; then 01hpschd.sf2 is loaded and assigned to replace the 100th preset of sf_GMbank.sf2
    ; then 07AcousticGuitar.sf2 is loaded and assigned to replace the 20th preset of sf_GMbank.sf2

    	sfpassign	0, gisf
    	sfpassign	100, gir
            sfpassign	20, giv

    instr 1

    inum	=	p4
    ivel	=	p5
    kamp	linsegr	1, 1, 1, .1, 0
    kamp	= kamp/600000 * ivel					;scale amplitude and velocity dependent
    kfreq	=	1						;do not change freq from sf
    a1,a2	sfplay3	ivel, inum, kamp, kfreq, p6			;preset index starts at 0, counting up
    	outs	a1, a2

    	endin

    </CsInstruments>
    <CsScore>

    i1 0 1 60 100   0   ; Piano 1 from sf_GMbank.sf2
    i1 + 1 62 <     .
    i1 + 1 65 <     .
    i1 + 1 69 10    .

    i1 5 1 60 100   100 ; harpsichord from 01hpschd.sf2
    i1 + 1 62 <     .
    i1 + 1 65 <     .
    i1 + 1 69 10    .

    i1 10 1 60 100   20 ; guitar from 07AcousticGuitar.sf2
    i1 + 1 62 <     .
    i1 + 1 65 <     .
    i1 + 1 69 10    .

    i1 15 1 60 100   101 ; Goblin from sf_GMbank.sf2
    i1 + 1 62 <     .
    i1 + 1 65 <     .
    i1 + 1 69 10    .
    e
    </CsScore>
    </CsoundSynthesizer>

## See also

Soundfonts

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

## Credits

Author: Gabriel Maldonado
Italy
May 2000

New in Csound Version 4.07

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