Automatic player piano equipped with mute lock system for reproducing faint sounds in playback mode

An automatic player piano comprising:

• a) a keyboard having a plurality of keys each swingable when depressed by a player;
• b) a plurality of key action mechanisms respectively coupled with said keys, and moving when the player depresses the associated keys;
• c) a plurality of hammer mechanisms respectively coupled with said plurality of key action mechanisms, and having respective hammers selectively driven by the associated key action mechanisms for striking associated music wires, and a hammer rail causing said hammers to move between a closer position to said associated music wires and a spaced position from said associated music wires;
• d) a soft pedal mechanism having a soft pedal depressed by said player, and a pedal mechanism responsive to motion of said soft pedal and operative to drive said hammer rail for causing said hammers to move to said closer position;
• e) a playback means operative to cause said hammer mechanisms to selectively strike said associated music wires for reproducing sounds without said player;
• f) an actuator selectively entering a first state and a second state, and operative to drive said pedal mechanism for causing said hammers to move between said closer position and said spaced position;
• and
• g) a mute lock means provided in association with said actuator, and operative to keep said actuator in said second state for keeping said hammers in said closer position, said mute lock means comprising:
• g-1) a bracket fixed to said pedal mechanism and movable together with said pedal mechanism,
• g-2) a claw member movable between an engageable position with said bracket and a spaced position without engagement with said bracket, and
• g-3) a mute lock actuator coupled with said claw member for driving between said engageable position and said spaced position.