Sample playback now resamples from the sample's actual detected fundamental instead of assuming the recording is C4/A4, so each key sounds at its true note frequency. - native notepat: windowed-autocorrelation detectFundamental(); store as per-sample base (global + per-key banks); play/pitch-bend use it, with a C4 fallback for untuned/quiet captures. - menuband: mirror detector in Swift; cents = 1200*log2(targetHz/f0) into AVAudioUnitTimePitch; detect in stopRecording under bufferLock.