Ruby Wrapper for Voicemeeter API

This gem offers a Ruby interface for the Voicemeeter Remote C API.

For an outline of past/future changes refer to: CHANGELOG

Tested against

• Basic 1.0.8.8
• Banana 2.0.6.8
• Potato 3.0.2.8

Requirements

• Voicemeeter
• Ruby 3.2 or greater

Installation

Bundler

bundle add 'voicemeeter'
bundle install

Use

Simplest use case, request a Remote class of a kind, then pass a block to run.

Login and logout are handled for you in this scenario.

main.rb

require "voicemeeter"

class Main
  def run
    Voicemeeter::Remote
      .new(:banana)
      .run do |vm|
        vm.strip[0].label = "podmic"
        vm.strip[0].mute = true
        puts "strip 0 #{vm.strip[0].label} mute was set to #{vm.strip[0].mute}"

        vm.bus[3].gain = -6.3
        vm.bus[4].eq.on = true
        info = [
          "bus 3 gain has been set to #{vm.bus[3].gain}",
          "bus 4 eq has been set to #{vm.bus[4].eq.on}"
        ]
        puts info
      end
  end
end

Main.new.run if $PROGRAM_NAME == __FILE__

Otherwise you must remember to call vm.login vm.logout at the start/end of your code.

KIND_ID

Pass the kind of Voicemeeter as an argument. KIND_ID may be:

• :basic
• :banana
• :potato

Available commands

Strip

The following attributes are available.

• mono: boolean
• solo: boolean
• mute: boolean
• gain: float, from -60.0 to 12.0
• audibility: float, from 0.0 to 10.0
• limit: int, from -40 to 12
• A1 - A5, B1 - B3: boolean
• label: string
• mc: boolean
• karaoke: int, from 0 to 4
• bass: float, from -12.0 to 12.0
• mid: float, from -12.0 to 12.0
• treble: float, from -12.0 to 12.0
• reverb: float, from 0.0 to 10.0
• delay: float, from 0.0 to 10.0
• fx1: float, from 0.0 to 10.0
• fx2: float, from 0.0 to 10.0
• pan_x: float, from -0.5 to 0.5
• pan_y: float, from 0.0 to 1.0
• color_x: float, from -0.5 to 0.5
• color_y: float, from 0.0 to 1.0
• fx_x: float, from -0.5 to 0.5
• fx_y: float, from 0.0 to 1.0
• postreverb: boolean
• postdelay: boolean
• postfx1: boolean
• postfx2: boolean

example:

vm.strip[3].gain = 3.7
puts vm.strip[0].label

The following methods are available.

• appgain(name, value): string, float, from 0.0 to 1.0

Set the gain in db by value for the app matching name.

• appmute(name, value): string, bool

Set mute state as value for the app matching name.

example:

vm.strip[5].appgain("Spotify", 0.5)
vm.strip[5].appmute("Spotify", true)

Comp

The following attributes are available.

• knob: float, from 0.0 to 10.0
• gainin: float, from -24.0 to 24.0
• ratio: float, from 1.0 to 8.0
• threshold: float, from -40.0 to -3.0
• attack: float, from 0.0 to 200.0
• release: float, from 0.0 to 5000.0
• knee: float, from 0.0 to 1.0
• gainout: float, from -24.0 to 24.0
• makeup: boolean

example:

puts vm.strip[4].comp.knob

Strip Comp parameters are defined for PhysicalStrips.

knob defined for all versions, all other parameters potato only.

Gate

The following attributes are available.

• knob: float, from 0.0 to 10.0
• threshold: float, from -60.0 to -10.0
• damping: float, from -60.0 to -10.0
• bpsidechain: int, from 100 to 4000
• attack: float, from 0.0 to 1000.0
• hold: float, from 0.0 to 5000.0
• release: float, from 0.0 to 5000.0

example:

vm.strip[2].gate.attack = 300.8

Strip Gate parameters are defined for PhysicalStrips.

knob defined for all versions, all other parameters potato only.

Denoiser

The following attributes are available.

• knob: float, from 0.0 to 10.0

example:

vm.strip[0].denoiser.knob = 0.5

Strip Denoiser parameters are defined for PhysicalStrips, potato version only.

EQ

The following attributes are available.

• on: boolean
• ab: boolean

example:

vm.strip[0].eq.ab = True

Strip EQ parameters are defined for PhysicalStrips, potato version only.

Gainlayers

• gain: float, from -60.0 to 12.0

example:

vm.strip[3].gainlayer[3].gain = 3.7

Gainlayers are defined for potato version only.

Levels

The following attributes are available.

• prefader
• postfader
• postmute

example:

puts vm.strip[3].levels.prefader

Level properties will return -200.0 if no audio detected.

Bus

The following attributes are available.

• mono: boolean
• mute: boolean
• sel: boolean
• gain: float, from -60.0 to 12.0
• label: string
• returnreverb: float, from 0.0 to 10.0
• returndelay: float, from 0.0 to 10.0
• returnfx1: float, from 0.0 to 10.0
• returnfx2: float, from 0.0 to 10.0
• monitor: boolean

example:

vm.bus[3].gain = 3.7
puts vm.bus[0].label

vm.bus[4].mono = true

EQ

The following attributes are available.

• on: boolean
• ab: boolean

example:

vm.bus[4].eq.on = true

Modes

The following attributes are available.

• normal: boolean
• amix: boolean
• bmix: boolean
• composite: boolean
• tvmix: boolean
• upmix21: boolean
• upmix41: boolean
• upmix61: boolean
• centeronly: boolean
• lfeonly: boolean
• rearonly: boolean

The following methods are available.

• get

example:

vm.bus[4].mode.amix = true
puts vm.bus[3].mode.get

Levels

The following attributes are available.

• all

example:

puts vm.bus[0].levels.all

levels.all will return -200.0 if no audio detected.

Strip | Bus

The following methods are available

• fadeto(amount, time): float, int
• fadeby(amount, time): float, int

Modify gain to or by the selected amount in db over a time interval in ms.

example:

vm.strip[0].fadeto(-10.3, 1000)
vm.bus[3].fadeby(-5.6, 500)

Strip.Device | Bus.Device

The following attributes are available

• name: str
• sr: int
• wdm: str
• ks: str
• mme: str
• asio: str

example:

puts vm.strip[0].device.name
vm.bus[0].device.asio = "Audient USB Audio ASIO Driver"

strip|bus device parameters are defined for physical channels only.

name, sr are read only. wdm, ks, mme, asio are write only.

Macrobuttons

Three modes defined: state, stateonly and trigger.

• state: boolean
• stateonly: boolean
• trigger: boolean

example:

vm.button[37].state = true
vm.button[55].trigger = false

Recorder

The following attributes accept boolean values.

• loop: boolean
• A1 - A5: boolean
• B1 - A3: boolean

The following methods are available

• play
• stop
• pause
• record
• ff
• rew
• load(filepath): string

example:

vm.recorder.play
vm.recorder.stop

# Enable loop play
vm.recorder.loop = true

# Disable recorder out channel B2
vm.recorder.B2 = false

# filepath as string
vm.recorder.load('C:\music\mytune.mp3')

VBAN

• vm.vban.enable | vm.vban.disable Turn VBAN on or off

Instream | Outstream

The following attributes are available.

• on: boolean
• name: string
• ip: string
• port: int, range from 1024 to 65535
• sr: int, (11025, 16000, 22050, 24000, 32000, 44100, 48000, 64000, 88200, 96000)
• channel: int, from 1 to 8
• bit: int, 16 or 24
• quality: int, from 0 to 4
• route: int, from 0 to 8

SR, channel and bit are defined as readonly for instreams. Attempting to write to those parameters will throw an error. They are read and write for outstreams.

example:

# turn VBAN on
vm.vban.enable

# turn on vban instream 0
vm.vban.instream[0].on = true

# set bit property for outstream 3 to 24
vm.vban.outstream[3].bit = 24

Command

Certain 'special' commands are defined by the API as performing actions rather than setting values. The following methods are available:

• show : Bring Voiceemeter GUI to the front
• hide : Hide Voicemeeter GUI
• shutdown : Shuts down the GUI
• restart : Restart the audio engine

The following attributes are write only and accept boolean values.

• showvbanchat: boolean
• lock: boolean

example:

vm.command.restart
vm.command.showvbanchat = true

Device

• ins outs : Returns the number of input/output devices
• input(i) output(i) : Returns a hash of device properties for device[i]

example:

vm.run { (0...vm.device.ins).each { |i| puts vm.device.input(i) } }

Midi

The following attributes are available:

• channel: int, returns the midi channel
• current: int, returns the current (or most recently pressed) key

The following methods are available:

• get(key): int, returns most recent velocity value for a key

example:

puts vm.midi.get(12)

get may return nil if no value for requested key in midi cache

Multiple parameters

• apply Set many strip/bus/macrobutton/vban parameters at once, for example:

vm.apply(
  {
    "strip-0" => {
      mute: true,
      gain: 3.2,
      A1: true
    },
    "bus-3" => {
      gain: -3.2,
      eq: {
        on: true
      }
    },
    "button-39" => {
      stateonly: true
    },
    "vban-outstream-3" => {
      on: true,
      bit: 24
    }
  }
)

Or for each class you may do:

vm.strip[0].apply(mute: true, gain: 3.2, A1: true)
vm.vban.outstream[0].apply(on: true, name: "streamname", bit: 24)

Config Files

vm.apply_config(<configname>)

You may load config files in TOML format. Three example configs have been included with the package. Remember to save current settings before loading a config. To set one you may do:

require "voicemeeter"
Voicemeeter::Remote.new(:banana).run { |vm| vm.apply_config(:example) }

will load a config file at mydir/configs/banana/example.toml for Voicemeeter Banana.

Events

By default, NO events listened for.

Use keyword args pdirty, mdirty, midi, ldirty to initialize event updates.

example:

require 'voicemeeter'
# Set updates to occur every 50ms
# Listen for level updates
Voicemeeter::Remote.new(:banana, ratelimit: 0.05, ldirty: true).run do
  ...

vm.register|vm.deregister

Use the register/deregister methods to register/deregister callbacks and event observers.

example:

# register a callback to receive updates
class App():
    def initialize(vm)
        @vm = vm
        @vm.callback.register(method(:on_pdirty))
        ...

    def on_pdirty
        ...

vm.event

Use the event class to toggle updates as necessary.

The following attributes are available:

• pdirty: boolean
• mdirty: boolean
• midi: boolean
• ldirty: boolean

example:

vm.event.ldirty = true

vm.event.pdirty = false

Or add, remove an array of events.

The following methods are available:

• add(events)
• remove(events)
• get

example:

vm.event.add(%w[pdirty mdirty midi ldirty])

vm.event.remove(%w[pdirty mdirty midi ldirty])

# get a list of currently subscribed
p vm.event.get

Voicemeeter Module

Remote class

Voicemeeter.remote

You may pass the following optional keyword arguments:

• sync: boolean=false, force the getters to wait for dirty parameters to clear. For most cases leave this as false.
• ratelimit: float=0.033, how often to check for updates in ms.
• pdirty: boolean=true, parameter updates
• mdirty: boolean=true, macrobutton updates
• midi: boolean=true, midi updates
• ldirty: boolean=false, level updates

Access to lower level Getters and Setters are provided with these functions:

• vm.get(param, string=false): For getting the value of any parameter. Set string to true if getting a property value expected to return a string.
• vm.set(param, value): For setting the value of any parameter.

Access to lower level polling functions are provided with these functions:

• vm.pdirty?: Returns true iff a parameter has been updated.
• vm.mdirty?: Returns true iff a macrobutton has been updated.

example:

vm.get("Strip[2].Mute")
vm.set("Strip[4].Label", "stripname")
vm.set("Strip[0].Gain", -3.6)

Errors

• Errors::VMError: Error raised when general errors occur.
• Errors::VMCAPIError: Error raised when the C-API returns error values.
  • Error codes are stored in {Error Class}.code. For a full list of error codes check the VoicemeeterRemote header file.

Logging

To enable logs set an environmental variable LOG_LEVEL to the appropriate level.

example in powershell:

$env:VM_LOG_LEVEL="DEBUG"

Tests

To run all tests:

Bundle exec rake

Official Documentation

• Voicemeeter Remote C API