Abstract: A pitch control system for the automatic pitch correction according to a harmony-dependent tuning, especially the harmonic tuning, for a musical instrument, having an input device for the input of note input signals in a pre-determined fixed tuning, especially the tempered tuning, and having a note generation device to which the note input signals are applicable, comprises a chord recognition circuit which ascertains at each input signal pattern corresponding to a chord whether this input signal pattern corresponds to a chord pattern from a pre-determined quantity of chord patterns, a signal pattern store circuit in which for each chord pattern of the pre-determined quantity of chord patterns a signal pattern is stored, and a control circuit which, when the chord recognition circuit ascertains that an input signal pattern is present corresponding to one of the pre-determined chord patterns, causes the signal pattern store circuit to emit the signal pattern, corresponding to the ascertained chord pattern, to t