It's possible to filter MIDI in the VoiceLive 2, which it sounds like you probably want to do. This is done in the "Setup" menu, on the "MIDI" tab, under "Filter" - you can use this to tell the VL2 to ignore certain MIDI data. Cheers!
When you're plugging the VoiceLive 3's XLR outputs into your interface, their content depends on your output mode. To get a wet signal out the XLR outputs, go into the "Setup" menu, and on the "Output" tab set the "XLR Output Mode" to Stereo and record both XLR outputs into your interface in stereo. If you're using the VoiceLive with an FX150, you're better off setting the output mode to "Mono" and just using the Left XLR output (which would contain the wet vocals and guitar) into the monitor.
VoiceLive 3 isn't compatible with Asio drivers - so for USB audio with Reaper you'll have to use a native Windows driver like DirectSound, WaveOut, or Wasapi (whichever gives you the lowest latency). Hopefully that's helpful, cheers!
Unfortunately our harmony algorithm is not intended to be able to harmonize with high-frequency content like whistling. Even our newer Harmony Singer 2 pedal has this same inability to harmonize with very high pitches. There have been bugs in various TCH products that caused the master output of the product to distort when whistling was input, but what you're hearing is the harmony voice(s) distorting rather than the overall output, which is a separate issue that does not have a patch. My suggestion is that during whistling sections of your song to disable the harmony effect and bring it back in when yo're singing again. Cheers!
You're correct in that the lead mute function is not accessible via MIDI. I don't really know why it didn't make the cut, but I've logged this as a feature request in our VL3 project. Cheers!
Just to confirm, by " set the output levels to max" you're referring to the "USB Out Level" parameter in the "Mix" menu? You probably want that maxed out to "0 dB". Another thing to check is if Windows is lowering the level, go into your "Playback Devices" menu in Windows (I'm also on Windows 10) and view the Properties of your PlayAcoustic - there's a "Levels" tab that you probably also want to max out.
Typcally this issue is caused by the type of microphone you're using, specifically its polar pattern. A cardioid microphone like an SM58 is pretty good at isolating your vocals, but a hypercardioid mic like the MP-75 is more directional and even better at isolating your voice from surrounding sounds. Another technique that might help is turning down your mic's input gain in your VoiceLive and singing closer to your mic. Hopefully that's helpful, cheers!
Yeah this should be possible! I've been able to sync the VL3 up with a RC-505 before, I don't have a RC-300 here but it should be about the same setup. Just keep in mind that the VoiceLive can only slave to MIDI tempo, not create it, so the RC-300 will be your master and its MIDI out will connect to the VoiceLive's MIDI in to keep rhythmic effects like Delay in time.
Performing a factory reset requires the unit to be able to boot, so unfortunately I don't think that will work in your case. Please get in contact with our support team through this link to further discuss troubleshooting and potential repairs. Good luck!
I can confirm that when the output mode is set to Stereo, plugging a cable into the 6.5mm "GUITAR" output (wet output, not the Guitar Thru) should remove the guitar signal from the XLR outputs. Are you running the latest firmware? Build 366 is the latest, if you aren't, you can update with our VoiceSupport 2 application. If you are running the latest firmware and still having this issue, my guess is that the JackSense feature for the guitar output jack is physically broken and it can't tell that you're plugging something in - in which case you'd need to get in contact with our support team to discuss repairs. But hopefully it's just a matter of updating the firmware.