Description

Plugin opcode in jacko. 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

Starts, stops, or repositions the Jack transport. This is useful, e.g., for starting an external sequencer playing to send MIDI messages to Csound.

Syntax

JackoTransport  kcommand, [kposition]

Performance

kcommand -- 0 means "no action", 1 starts the transport, 2 stops the transport, and 3 positions the transport to kposition seconds from the beginning of performance (i.e. time 0 in the score).

kposition -- Time to position to the transport, in seconds from the beginning of performance (i.e. time 0 in the score).

This opcode can be used at init time or during performance.

The granularity of timing is Csound's kperiod.

Examples

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

<CsoundSynthesizer>
<CsOptions>
-n
</CsOptions>
<CsInstruments>
sr  = 48000
ksmps = 128
nchnls  = 2
0dbfs   = 1

; by Menno Knevel - 2023

JackoInit   "default", "csound6"                                        ; Csound as a Jack client

instr 1	; position & start external DAW
JackoTransport  3, 10                                                   ; set playbackhead of DAW to zero in 10 seconds                                                    
JackoTransport  1                                                       ; start transport and thus the playbackhead
endin

instr 2	; stop playback of DAW
JackoTransport  2
endin

</CsInstruments>
<CsScore>
i1  5	.1
i2  20  .1
e
</CsScore>
</CsoundSynthesizer>

See Also

JackoInfo, JackoInfo, JackoFreewheel, JackoAudioOutConnect, JackoMidiInConnect, JackoMidiOutConnect, JackoOn, JackoAudioIn, JackoMidiOut, JackoNoteOut.

Credits

By: Michael Gogins 2010