PedalPi-PluginsManager 0.3.0

Pythonic management of LV2 audio plugins with mod-host.

Pythonic management of LV2 audio plugins with mod-host.

Documentation:

http://pedalpi-pluginsmanager.readthedocs.io/

Code:

https://github.com/PedalPi/PluginsManager

Python Package Index:

https://pypi.org/project/PedalPi-PluginsManager

License:

Apache License 2.0

Example

This examples uses Calf and Guitarix audio plugins

Download and install mod-host. For more information, check the ModHost section.

Start audio process

# In this example, is starting a Zoom g3 series audio interface
jackd -R -P70 -t2000 -dalsa -dhw:Series -p256 -n3 -r44100 -s &
mod-host

Play!

from pluginsmanager.banks_manager import BanksManager
from pluginsmanager.mod_host.mod_host import ModHost

from pluginsmanager.model.bank import Bank
from pluginsmanager.model.pedalboard import Pedalboard
from pluginsmanager.model.connection import Connection

from pluginsmanager.model.lv2.lv2_effect_builder import Lv2EffectBuilder

from pluginsmanager.model.system.system_effect import SystemEffect

Creating a bank

# BanksManager manager the banks
manager = BanksManager()

bank = Bank('Bank 1')
manager.append(bank)

Connecting with mod_host. Is necessary that the mod_host process already running

mod_host = ModHost('localhost')
mod_host.connect()
manager.register(mod_host)

Creating pedalboard

pedalboard = Pedalboard('Rocksmith')
bank.append(pedalboard)
# or
# bank.pedalboards.append(pedalboard)

Loads pedalboard. All changes in pedalboard are reproduced in mod_host

mod_host.pedalboard = pedalboard

Add effects in the pedalboard

builder = Lv2EffectBuilder()

reverb = builder.build('http://calf.sourceforge.net/plugins/Reverb')
fuzz = builder.build('http://guitarix.sourceforge.net/plugins/gx_fuzz_#fuzz_')
reverb2 = builder.build('http://calf.sourceforge.net/plugins/Reverb')

pedalboard.append(reverb)
pedalboard.append(fuzz)
pedalboard.append(reverb2)
# or
# pedalboard.effects.append(reverb2)

For obtains automatically the sound card inputs and outputs, use SystemEffectBuilder. It requires JACK-Client.

from pluginsmanager.model.system.system_effect_builder import SystemEffectBuilder
sys_effect = SystemEffectBuilder()

For manual input and output sound card definition, use:

sys_effect = SystemEffect('system', ['capture_1', 'capture_2'], ['playback_1', 'playback_2'])

Note

NOT ADD sys_effect in any Pedalboard

Connecting mode one:

sys_effect.outputs[0].connect(reverb.inputs[0])

reverb.outputs[0].connect(fuzz.inputs[0])
reverb.outputs[1].connect(fuzz.inputs[0])
fuzz.outputs[0].connect(reverb2.inputs[0])
reverb.outputs[0].connect(reverb2.inputs[0])

reverb2.outputs[0].connect(sys_effect.inputs[0])
reverb2.outputs[0].connect(sys_effect.inputs[1])

Connecting mode two:

pedalboard.connections.append(Connection(sys_effect.outputs[0], reverb.inputs[0]))

pedalboard.connections.append(Connection(reverb.outputs[0], fuzz.inputs[0]))
pedalboard.connections.append(Connection(reverb.outputs[1], fuzz.inputs[0]))
pedalboard.connections.append(Connection(fuzz.outputs[0], reverb2.inputs[0]))
pedalboard.connections.append(Connection(reverb.outputs[0], reverb2.inputs[0]))

pedalboard.connections.append(Connection(reverb2.outputs[0], sys_effect.inputs[0]))
pedalboard.connections.append(Connection(reverb2.outputs[0], sys_effect.inputs[1]))

Warning

If you need connect system_output with system_input directly (for a bypass, as example), only the second mode will works:

pedalboard.connections.append(Connection(sys_effect.outputs[0], sys_effect.inputs[0]))

Set effect status (enable/disable bypass) and param value

fuzz.toggle()
# or
# fuzz.active = not fuzz.active

fuzz.params[0].value = fuzz.params[0].minimum / fuzz.params[0].maximum

fuzz.outputs[0].disconnect(reverb2.inputs[0])
# or
# pedalboard.connections.remove(Connection(fuzz.outputs[0], reverb2.inputs[0]))
# or
# index = pedalboard.connections.index(Connection(fuzz.outputs[0], reverb2.inputs[0]))
# del pedalboard.connections[index]

reverb.toggle()

Removing effects and connections:

pedalboard.effects.remove(fuzz)

for connection in list(pedalboard.connections):
    pedalboard.connections.remove(connection)

for effect in list(pedalboard.effects):
    pedalboard.effects.remove(effect)
# or
# for index in reversed(range(len(pedalboard.effects))):
    # del pedalboard.effects[index]

Maintenance

Test

It is not necessary for the mod_host process to be running

coverage3 run --source=pluginsmanager setup.py test

coverage3 report
coverage3 html
firefox htmlcov/index.html

Generate documentation

This project uses Sphinx + Read the Docs.

You can generate the documentation in your local machine:

pip3 install sphinx

cd docs
make html

firefox build/html/index.html