Objective audio quality measurement

Octave coupling means for pianos

Omnidirectional loudspeaker system

Operating apparatus used at an electronic instrument...

Optical decoding technique for speech recognition

Optical disc drive for organ

Optical instrument for producing musical tones or images by...

Optical pickup for a musical instrument

Optimal method of data reduction in a speech recognition system

Optimization of mp3 encoding with complete decoder...

Opto-electric system for sensing string vibration

Organ circuit and method of operation

Organ drop-in key assembly

Organ keyboard switching system

Organ pipes

Organ stop tablet and filter assembly

Organ system for automatically producing runs of various...

Oriented polymer reeds for musical instruments

Ornamental closure

Oscillating ultrasound scanhead