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Don't shoot the piano tuner.: Piano pedals (1) - the sustain pedal
Pedal piano - Wikipedia
The Piano Deconstructed
What Do the Pedals on a Piano Do?
The Harmonic Piano Pedal Mechanism
Don't shoot the piano tuner.: Piano pedals (2) - soft pedals - una corda, half-blow and celeste
What Do The Piano Pedals Do?
What are the main differences between a grand piano and an upright?
What do the Pedals on Upright Pianos Do?
Piano Pedals, What Do Piano Pedals Do, Sustain Pedal