1. A COMPACT UPRIGHT PIANO COMPRISING A KEYBOARD HAVING A PLURALITY OF BENT KEYS EACH PIVOTED NEAR THE BEND THEREOF AND EACH HAVING A RELATIVELY SHORT HORIZONTAL PLAYING PORTION AND A VERTICALLY DEPENDING PORTION, A PLURALITY OF WIPPENS MOUNTED BELOW AND REARWARDLY OF SAID KEY HORIZONTAL PLAYING PORTIONS, A PLURALITY OF HAMMERS ABOVE SAID WIPPENS, A VERTICALLY DISPOSED METAL FRAME CARRYING A PLURALITY OF STRINGS ACROSS A BRIDGE AND REARWARDLY OF SAID PLURALITY OF HAMMERS, A SOUNDING BOARD DISPOSED ESSENTIALLY PARALLEL TO AND REARWARDLY OF SAID PLURALITY OF STRINGS AND COMMUNICATING WITH SAID BRIDGE,