Which of the following controls could be used if the voice pitch of a single-sideband signal returning to your CQ call seems too high or low?
Why In SSB the carrier is suppressed, so the audio pitch you hear depends entirely on how closely your receive frequency matches the other station's transmit frequency. If the other station is a few hundred hertz off, every voice frequency shifts by that amount and the voice sounds too high (chipmunk) or too low (growly). Receiver incremental tuning, also called the clarifier, nudges the receive frequency slightly without moving your transmit frequency, so you can correct the pitch and stay on their frequency when you answer.
Watch out Changing bandwidth only narrows or widens the filter passband, which affects how much noise and adjacent signals you hear, not the pitch of the recovered audio; AGC controls gain and tone squelch is an FM subaudible tone feature.
RIT = Receive-only tuning. Clarifier 'clarifies' the Donald Duck voice by shifting RX a few hundred Hz.