The VoiceLive Touch 2 harmonizer works based on incoming MIDI Note On messages. It does not have a "chromatic transposition" setting. Check the operation of your MIDI keyboard:

1. If all outgoing Note On messages change after the MIDI keyboard is transposed, the VoiceLive Touch 2 harmonizer will work fine.

2. Apart from note data, there is another, separate MIDI message that is used for transposing, meaning: the Note On messages themselves appear the same but the transposition value is transmitted separately. As far as I know, TC-Helicon VoiceLive Touch 2 do not respond to that transposition message. In this case, the VoiceLive Touch 2 harmonizer will not work well.

I think it has balanced line level outputs on it.

According to the Play Acoustic manual, there is no way.

@PigDoc101 

Hello Phil, welcome to the community.

According to the user manual, the Harmony Singer has an always-on phantom supply on the mic input but I think it is 24V. It will almost certainly not pass phantom from the output to the input. If your mic needs the full 48V, you would need to use an external phantom supply between the mic and the pedal.

Another approach could be to connect the mic directly to your mixer and configure the Harmony Singer in an effects loop (assuming your mixer supports that).

The TC-Helicon single pedals do in fact have 24V phantom power that is always on. It's an interesting design decision but ultimately I would prefer a micro-switch to disable it.

Many condenser mics can operate using phantom values from +9V to +52V, though you may find certain condensers will not function, or will not function correctly unless supplied the nominal voltage of +48V. Please note, you will not harm your mic if it does not have enough voltage to power it properly. Microphones designed to operate at 48V phantom power will work at lower voltages with decreased headroom.

Thank you for this kiskadar69.  My new condenser has arrived and states that it requires 48V +/-4V to work properly, but I now have confidence to at least try it in conjunction with the 24V suplied by the Harmony Singer without damaging it. 

It does seem an odd voltage to put into the pedal, I would have liked an option of 48V or nothing rather than the permanent 24V, or the ability for the mixer desk or interface to provide 48V phantom power which could run through the pedal - however, not being an electircal engineer I have no idea if this is at all feasible!

I've often wondered why, all of a sudden,out of the blue someone decided to change 48v phantom power to

a "new
hope
standard" of 24v.

Whose bright idea was that ? for no reason at all,

"Hey everybody, you know that 48v standard for phantom power that we've had for years ? Of course you do,you've spent thousands of pounds on expensive Mic's and pre-amps that all run on 48v...Welllllllll,guess what !! We've changed it !!! It's now more betterer and modernuristic!!!"

Everybody: "Wtf ? why ?....well,i suppose if it's more modernistick. What did you change it to, 9v or 12v ? at least i'll be able to use a guitar power supply..."

Yesssss, that's right!! we've changed it to 24v !!

FFS!! music industry !! says everyone...

---

@PetGerbil wrote:

I've often wondered why, all of a sudden,out of the blue someone decided to change 48v phantom power to

a "new
hope
standard" of 24v.

Whose bright idea was that ? for no reason at all,

"Hey everybody, you know that 48v standard for phantom power that we've had for years ? Of course you do,you've spent thousands of pounds on expensive Mic's and pre-amps that all run on 48v...Welllllllll,guess what !! We've changed it !!! It's now more betterer and modernuristic!!!"

 

Everybody: "Wtf ? why ?....well,i suppose if it's more modernistick. What did you change it to, 9v or 12v ? at least i'll be able to use a guitar power supply..."

 

Yesssss, that's right!! we've changed it to 24v !!

 

FFS!! music industry !! says everyone...

---

@PetGerbil 

Not wishing to spoil your fun but 24V phantom (P24) was added to the DIN standard (now DIN EN 61938) in 1979 - joining the earlier P12 and P48. It was added because it allows better power transfer which was thought to be an advantage with more-complex mics. It was actually recommended for new designs in 1996.

Really only true condenser mics need 48V for polarization. Many mics that use pre-polarized electret capsules will work cheerfully down to 9V. I imagine the designers of these pedals had not thought it likely that they would be used with studio-grade condenser mics...

@pfrocha 

This is something you should check:

For Mojave and  Catalina to allow sound in: System Preferences: Security: Privacy and Microphone. Check the software you want to allow.

If it not, let us know

Thanks for the suggestion. I'm on Catalina.  I checked the security preferences as you said, but both Logic and Mainstage are already there.

Also, I happen to have to have a simple Blue iCycle USB microphone adapter and when I tried plugging it directly into the iMac it Logic recorded the audio just fine.

I simply don't know what's going on when I use the Perform VK...

@pfrocha 

Have you tried "Input 3" on Logic's inspector?

Anything?

Hellooooo!, anybody out there?

MIDI itself does not have a program increment or decrement message.

Maybe if you described your original problem, they could help you more (not sure in this forum).

You should also describe what other MIDI devices are available to you. The solution could be for an intelligent MIDI "interpreter" to translate certain incoming MIDI messages (increase, decrease) into a Program Change message.