vban-cmd-python/README.md

# VBAN CMD
This package offers a Python interface for the [Voicemeeter RT Packet Service](https://vb-audio.com/Voicemeeter/VBANProtocol_Specifications.pdf).

It can be used standalone as well as to extend the [Voicemeeter Remote API](https://github.com/onyx-and-iris/voicemeeter-api-python) since the two interfaces have been designed to offer the same higher level classes/methods. Not everything available in the Remote API interface is available through this one.

Only the TEXT service sub protocol and RT-Packet Service have been implemented, for sending audio across a network with VBAN you will need to look elsewhere.

## Tested against
- Basic 1.0.8.1
- Banana 2.0.6.1
- Potato 3.0.2.1

## Prerequisites
- Voicemeeter 1 (Basic), 2 (Banana) or 3 (Potato)
- Python 3.9+

## Installation
```
git clone https://github.com/onyx-and-iris/vban-cmd-python
cd vban-cmd-python
```

Just the wrapper:
```
pip install .
```

With development dependencies:
```
pip install -e .['development']
```

#### Connection:
For sending a text request (sendtext or set_rt) several configuration options are available:
- `ip`: remote address
- `streamname`: default 'Command1'
- `port`: default 6990
- `channel`: from 0 to 255
- `bps`: bitrate of stream, default 0 should be safe for most cases.
only applies to `sendtext`:
- `delay`: default 0.001

Pass these values as arguments to vban_cmd.connect() as show in the example below.

Regarding fetching data (remote get), the code registers itself to the RT Packet Service every 10 seconds,
with a timeout of 15 seconds (same as streamer view app).

#### Use with a context manager:
Unlike the Remote API the VBAN RT Packet service has no login limitations since receiving data requires
a client to simply register to the service. It is advised to use this code with a context manager.
Parameter coverage is not as extensive for the RT Packet Service as with the Remote API so defined below are the
classes/methods available through this package.

Ideally this interface is used along with some background service (thread) for constantly updating the RT data packets but it can be
used directly in scripts such as Example 1.
Check examples directory for a more meaningful example.

### Example 1
```python
import vban_cmd

class ManyThings:
    def __init__(self, vban):
        self.vban = vban

    def things(self):
        # Set the mapping of the second input strip
        self.vban.strip[1].A3 = True
        print(f'Output A3 of Strip {self.vban.strip[1].label}: {self.vban.strip[1].A3}')

    def other_things(self):
        # Toggle mute for the leftmost output bus
        self.vban.bus[0].mute = not self.vban.bus[0].mute


def main():
    with vban_cmd.connect(kind_id, ip=ip) as vban:
        do = ManyThings(vban)
        do.things()
        do.other_things()

if __name__ == '__main__':
    kind_id = 'potato'
    ip = '<ip address>'

    main()
```

## API
### Kinds
A *kind* specifies a major Voicemeeter version. Currently this encompasses
- `basic`
- `banana`
- `potato`

#### `vban_cmd.connect(kind_id, ip=ip) -> '(VbanCmd)'`
Factory function for remotes.
- `ip`: remote pc you wish to send requests to.


### `VbanCmd` (higher level)
#### `vban.type`
The kind of the Voicemeeter instance.
#### `vban.version`
A tuple of the form `(v1, v2, v3, v4)`.

#### `vban.strip`
An `InputStrip` tuple, containing both physical and virtual.
#### `vban.bus`
An `OutputBus` tuple, containing both physical and virtual.


#### `vban.sendtext(cmd)`
Sends a TEXT command, for example:
```python
# Use ';' or ',' for delimiters.
vban.sendtext('Strip[0].Mute=1;Strip[3].A3=0;Bus[2].Mute=0;Bus[3].Eq.On=1')
```
#### `vban.show()`
Shows Voicemeeter if it's hide. No effect otherwise.
#### `vban.hide()`
Hides Voicemeeter if it's shown. No effect otherwise.
#### `vban.shutdown()`
Closes Voicemeeter.
#### `vban.restart()`
Restarts Voicemeeter's audio engine.

### `Strip`
The following properties are gettable and settable:
- `mono`: boolean
- `solo`: boolean
- `mute`: boolean
- `label`: string
- `gainlayer`: float, -60 to 12
- `gain`: float, -60 to 12
- Output mapping (e.g. `A1`, `B3`, etc.): boolean, depends on the Voicemeeter kind

The following properties are settable:
- `comp`: float, from 0.0 to 10.0
- `gate`: float, from 0.0 to 10.0
- `limit`: int, from -40 to 12

### `Bus`
The following properties are gettable and settable:
- `mute`: boolean
- `mono`: boolean
- `eq`: boolean
- `eq_ab`: boolean
- `label`: string
- `gain`: float, -60 to 12

### `VbanCmd` (lower level)
#### `vban.set_rt(id_, param, val)`
Sends a string request RT Packet where the command would take the form:
```python
f'{id_}.{param}={val}'
```

#### `vban._get_rt()`
Used for updating the RT data packet, used internally by the Interface.
```python
vban.public_packet = vban._get_rt()
```

### `Errors`
- `errors.VMCMDErrors`: Base VMCMD error class.

### `Tests`
First make sure you installed the [development dependencies](https://github.com/onyx-and-iris/vban-cmd-python#installation)

To run the tests from tests directory:

`nosetests --r test -v`

## Resources
- [Voicemeeter RT Packet Service](https://vb-audio.com/Voicemeeter/VBANProtocol_Specifications.pdf)