OFAI

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Your query term was 'number = 2003-04'
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OFAI-TR-2003-04 ( 367kB g-zipped PostScript file,  1078kB PDF file)

Measurement and Reproduction Accuracy of Computer Controlled Grand Pianos

Werner Goebl, Roberto Bresin

The recording and reproducing capabilities of a Yamaha Disklavier grand piano and a Bösendorfer SE290 computer controlled grand piano were tested, with the goal of examining their usefulness for performance research. An experimental setup consisting of accelerometers and a calibrated microphone is used to capture key and hammer movements, as well as the acoustic signal. Five selected keys are played by pianists with two types of touch ('staccato legato'). Timing and dynamic differences between the original performance, the corresponding MIDI file recorded by the computer-controlled pianos, and its reproduction are analyzed. The two devices performed quite differently with respect to timing and dynamic accuracy. The Disklavier's onset capturing is slightly more precise (+/10 ms) than its reproduction (20 to +30 ms), the Bösendorfer performs generally better, but its timing accuracy is slightly less precise for recording (10 to 3 ms) than for reproduction (+/2 ms). Both devices exhibit a systematic (linear) error in recording over time. In the dynamic dimension, the Bösendorfer shows higher consistency over the whole dynamic range, while the Disklavier performs well only in a wide middle range. Neither device is able to capture or reproduce different types of touch.

Keywords: music performance, reproducing piano, Bösendorfer, Yamaha Disklavier

Citation: Goebl, W., & Bresin, R. (2003). Measurement and reproduction accuracy of computer-controlled grand pianos, submitted.