2 .bat scripts - 1. For changing screen between two monitors. 2. For enabling/disabling sound device and opening/closing application

I need two scripts for NFC tokens:

Changing between screens should look something like this but needs to work :D

if DisplaySwitch.exe /external=1 DisplaySwitch.exe /internal else DisplaySwitch.exe /external

Enabling sound device Voicemeeter

I got the first part but now I need to enable sound device which is already set as default device. I need it both ways in one script, first to enable sound device and to open voicemeeter application and to close voicemeeter and disable that playback device afterwards.

@echo off start "" "C:\Program Files (x86)\VB\Voicemeeter\voicemeeter.exe" /secondary /minimized

Thanks in advance guys :D