Thinking back, I'm not sure I am presenting my question accurately. Maybe pitch correction is the wrong word to use. Reading the manual it is interesting it states plugging a guitar in is optional, but under Features it states the harmonies are "guided by your guitar". If this is true, is this Natural Play at work affecting only the Harmonies, and does it affect the dry vocal signal too?
I am trying to gain a better understand of the pedal's behavior because the people I play music with do not have the most accurate voices to begin with and of course are dazzled by the pedal (lol). And, when they sing through the pedal they sound better too
from PDF Features Adds one to two voices of realistic vocal harmony guided by your guitar Superb reverb effect with three styles sweetens your vocal presentation Adaptive Tone automatically brightens, compresses and removes mud for pro vocal tone overall Harmony arrangement knob selects harmony voices above or below, close or far and combinations Easy inline connection between standard mic and mixer Clean Thru connection to guitar amp/PA Phantom power always on USB connection to free VoiceSupport application offering updates, product-specific news, and more Mic Control (patent pending) allows remote on/off switching using an optional TC-Helicon MP-75 or Sennheiser e835FX mic.
Aha, I think I understand your question better now, thanks for clarifying. So yes this is our NaturalPlay algorithm at work, using the guitar input as a guide to determine what harmony notes to choose relative to your lead/dry input voice. We do need to some internal pitch correcting, but your lead/dry voice will never be pitch corrected in Harmony Singer.
Input guitar notes @ 440Hz and 446Hz will produce the same harmony note. In this sense there is a little correction going on, in that we're correcting a potentially "out of tune" guitar input to be something in the chromatic scale (with reference to 440Hz tuning).
If you're singing a note @ 446Hz, we also do correction to the nearest chromatic note so that the harmony voices know which note to harmonize around. This means that if you're singing @ 446Hz, the harmony voices will still sound as they're harmonizing with a note sung @ 440 Hz.
I guess in a sense yes, we do have pitch correction going on in Harmony Singer, but it's all internal and not applied to your lead voice on the output. It's in there to account for out of tune instruments and producing harmony voices on actual tuned notes. Hopefully that makes sense and furthers your understanding of what's going on in there