Frequency modulator for an electronic musical instrument

Frequency number controlled clocks

Frequency separator for digital musical instrument chorus effect

Frequency spectrum conversion to natural harmonic...

Frequency spectrum conversion to natural harmonic...

Frequency-deviation method and apparatus

Frequency-deviation method and apparatus

Frequency-selectable signal generator

Fret

Fret dressing mask

Fret for stringed instruments

Fret for the fingerboard of plucked stringed instruments

Fret retractable neck for stringed musical instruments

Fret rod for stringed musical instruments

Fret system in stringed musical instruments

Fretboard to synthesizer interface apparatus

Fretless grooved fingerboard

Fretted musical instrument with detachable fingerboard for provi

Fretted/fretless stringed musical instrument

Friction at the jack and knuckle interface in a grand piano...