pyvmancer
Python library and CLI to automate the LZX Industries Videomancer over USB.
Two control paths, usable together or independently:
| Path | Transport | Covers |
|---|---|---|
| USB MIDI | ALSA rawmidi or any mido backend |
12 parameters (7/14-bit CC), preset recall, note triggers, clock/transport |
| USB serial | /dev/ttyACM* or libusb |
programs, presets, modulation operators, video, settings, filesystem |
Install
pip install pyvmancer # MIDI only
pip install "pyvmancer[all]" # adds serial and libusb transports
On Linux the python-rtmidi dependency links libasound.so.2:
sudo apt-get install libasound2t64
Use
import pyvmancer as vm
d = vm.Videomancer.open()
d.load_program("Isotherm")
d.set_named("Posterize", 5) # native units: Posterize is 0..7
d.set_named("Mix", 80) # Mix is 0..100
d.set_source("Contrast", "free lfo")
d.set_param(1, 0.75) # or address slots directly, 0.0..1.0
d.set_param(7, True) # toggles take bools
d.trigger(4) # note-trigger a modulation operator
d.set_bpm(128)
d.play()
d.close()
MIDI only, no serial link needed:
with vm.open_midi(channel=1) as m:
m.set_param(1, 0.5)
m.select_preset(3)
m.run_clock(120, beats=8)
CLI
vmancer devices # discover attached units and their device nodes
vmancer operators # list the 25 modulation operators
vmancer set 1=0.5 7=on # set parameters over MIDI
vmancer preset 3 # recall a preset
vmancer programs # list installed FPGA programs
vmancer load Isotherm # load a program
vmancer shell modulation status # run any raw shell command
Permissions
MIDI needs read/write on /dev/snd/midiC*D* (usually granted by a desktop ACL);
serial needs the dialout group or an ACL on /dev/ttyACM*. See
docs/permissions.md.
Docs
- docs/protocol.md — MIDI implementation and the serial command set
- docs/permissions.md — device node access, containers, udev
- docs/firmware-notes.md — observed firmware behaviour and quirks
Status
Verified against a Videomancer running firmware 1.0.0-rc.37. Not affiliated with LZX Industries.
License
Apache-2.0
1 maintainer
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