TC Electronic Classic XII Phaser Pedal notch/peak function switch?

[markphaser]

The TC Electronic Classic XII Phaser Pedal has a notch/peak function switch

What does this notch / peak function switch do?

[Mark Hammer]

Quite probably it inverts the feedback signal or inverts the overall phase-shift signal at the point where it gets mixed with the nonphase-shifted signal.  IN the one setting the phase shifted portion will produce notches.  IN the other it gets added to the dry signal to produce peaks.

That is my guess.

[markphaser]

Thanks alot mark hammer for the help

1.) IN the one setting the phase shifted portion will produce notches. 

Do u mean "Not mixing with the dry signal" just only the phase wet signal? will give u just notches

2.) IN the other it gets added to the dry signal to produce peaks

[markphaser]

??

[Mark Hammer]

No.  I mean that when you mix the dry/clean and phase-shifted signals together in-phase, you get a different sound than when you mix them together out of phase.  Phase-shifted only without clean will produce vibrato.