vstedit
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## vstedit

vstedit — Opens the GUI editor widow for a VST plugin.

## Syntax

    vstedit instance

## Description

vstedit opens the custom GUI editor widow for a VST plugin. Note that not all VST plugins have custom GUI editors. It may be necessary to use the --displays command-line option to ensure that Csound handles events from the editor window and displays it properly.

## Initialization

instance - the number which identifies the plugin, to be passed to other vst4cs opcodes.

## Examples

Here is an example of the use of the vstedit opcode. It uses the file vst4cs.csd.

Example 683. Example of the vstedit opcode

See the sections Real-time Audio and Command Line Flags for more information on using command line flags.

    <CsoundSynthesizer>
    <CsOptions>
    ; Credits: Adapted by Michael Gogins
    ; from code by David Horowitz and Lian Cheung.
    ; The "--displays" option is required in order for
    ; the Pianoteq GUI to dispatch events and display properly.
    -m3 --displays -odac
    </CsOptions>
    <CsInstruments>
    sr     = 44100
    ksmps  = 20
    nchnls = 2
                    ; Load the Pianoteq into memory.
    gipianoteq      vstinit         "C:\\Program Files\\Steinberg\\VstPlugins\\Pianoteq 3.0 Trial\\Pianoteq30 Trial.dll", 1

                    ; Print information about the Pianoteq, such as parameter names and numbers.
                    vstinfo         gipianoteq

                    ; Open the Pianoteq's GUI.
                    vstedit         gipianoteq

                    ; Send notes from the score to the Pianoteq.
                    instr 1
                    ; MIDI channels are numbered starting at 0.
                    ; p3 always contains the duration of the note.
                    ; p4 contains the MIDI key number (pitch),
                    ; p5 contains the MIDI velocity number (loudness),
    imidichannel    init            0
                    vstnote         gipianoteq, imidichannel, p4, p5, p3
                    endin

                    ; Send parameter changes to the Pianoteq.
                    instr 2
                    ; p4 is the parameter number.
                    ; p5 is the parameter value.
                    vstparamset     gipianoteq, p4, p5
                    endin

                    ; Send audio from the Pianoteq to the output.
                    instr 3
    ablankinput     init            0
    aleft, aright   vstaudio        gipianoteq, ablankinput, ablankinput
                    outs            aleft, aright
                    endin

    </CsInstruments>
    <CsScore>
    ; Turn on the instrument that receives audio from the Pianoteq indefinitely.
    i 3 0 -1
    ; Send parameter changes to Pianoteq before sending any notes.
    ; NOTE: All parameters must be between 0.0 and 1.0.
    ; Length of piano strings:
    i 2 0 1 33 0.5
    ; Hammer noise:
    i 2 0 1 25 0.1
    ; Send a C major 7th arpeggio to the Pianoteq.
    i 1 1 10 60 76
    i 1 2 10 64 73
    i 1 3 10 67 70
    i 1 4 10 71 67
    ; End the performance, leaving some time
    ; for the Pianoteq to finish sending out its audio,
    ; or for the user to play with the Pianoteq virtual keyboard.
    e 20
    </CsScore>
    </CsoundSynthesizer>

## Credits

By: Andrés Cabrera and Michael Gogins

Uses code from Hermann Seib's VSTHost and Thomas Grill's vst~ object.

VST is a trademark of Steinberg Media Technologies GmbH. VST Plug-In Technology by Steinberg.

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