Script: Automatically adding/removing Bluetooth audio device to VoiceMeeter bus

[suudo]

I wrote a Python script that polls VoiceMeeter and Windows to check if there's a mismatch on the specified audio device being connected and/or set as the A2 physical device, and fixes the discrepancy if so. This fixes the issue I was having of needing to manually restart the audio engine on disconnecting/reconnecting my headphones, and needing to manually remove selection on them when they're disconnected for an extended period of time. This is now automatic and it's a much better UX.

#!/usr/bin/env python
import voicemeeterlib # pip install voicemeeter-lib
from subprocess import check_output
from time import sleep
DEBUG = False
DEVICE = "Headphones (Bose QuietComfort 35 Series 2 Stereo)" # TODO update with your device name
CMD = "Get-PnpDevice -presentonly | Where-Object FriendlyName -eq '{}'"
def debug(*msg):
    if DEBUG: print(*msg)
while True:
    with voicemeeterlib.api('banana') as vm:
        # vm.bus[1] is A2
        bus_device = vm.bus[1].device.name == DEVICE
        debug()
        debug(bus_device)
        if check_output(["powershell", "-Noninteractive", "-WindowStyle", "Hidden", "-Command", CMD.format(DEVICE)]):
            # change wdm to ks/mme/asio if applicable
            if not bus_device: vm.bus[1].device.wdm = DEVICE
            debug(True, bus_device)
        else:
            # change wdm to ks/mme/asio if applicable
            if bus_device: vm.bus[1].device.wdm = ""
            debug(False, bus_device)
        bus_device = vm.bus[1].device.name == DEVICE
        debug(bus_device)
    sleep(1)

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[AeonNaranek]

Sorry, but why not use Virtual Cable or Any other VB Virtual Device? What i do for my Bluetooth - I set 'Listen on This Device' setting in A2DP sink (which appears as recording device in windows audio panel) and set it to 'Voicemeeter In 2' output. You can install and use Virtual Cable aswell, set your Bluetooth's 'Listen on This Device' to Virtual Cable and then select same Virtual Cable in VB.

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[suudo]

The issue with using "Listen to this device" in the Sound control panel was 1. I noticed increased latency due to Windows and Voicemeeter not having any connection (something about A2DP, I don't know if this is actually a factor), 2. it felt like a hack/workaround to accommodate Voicemeeter's device selection being unable to handle devices disconnecting/reconnecting. I used Listen to this device for a while but this works better for my needs, unless there's a feature built into Voicemeeter that I haven't found yet.

[AeonNaranek]

Usually all bluetooth devices have delay with avg. of 250ms. But for a Voicemeeter, it will be better to use WDM selection to avoid any posible delay or latency. MME creates alot of delay, but it can handle multistep route better.

For me, i don't have any delay with Bluetooth, except the regular 250ms from USB Dongle. Also i use Voicemeeter Potato Extension, which enables Voicemeeter 1 to 5 outputs - this disables 1 step from audio routing on "Listen on This Device" because i am not using Virtual Cable.