An APEE (Auxiliary Pedal Effect Evaluation) study was conducted to evaluate how the bFaaaP exerts effects on piano performance. Study subjects were grouped into three classes: Class I (adults); Class II (kids); and Class III (the challenged).
In this study, each subject was instructed to read a protocol and perform the test as follows:
1. Look at and practice the following sheet music.
2. Play the notes without using a bFaaaP.
3. Play the notes with pedal pattern 1 or 2 by using the bFaaaP.
4. Select a head tilt angle offset value (the upper limit of an offset range within which a pedal actuator does not respond to operation of bFaaaP by each subject) and a multiplier (used to adjust how fast the pedal actuator responds).
5. Start the test (each subject played the notes (pedal patterns) with or without using the bFaaaP.
Then, an iPhone was used to record the waveform of each test and the waveform was analyzed by Sonic Visualizer and ImageJ software. The following shows one of the results.
Summary of the results.
1. Use of bFaaaP made a statistically significant difference (p-value < 0.01). In addition, there was also a significant difference between pedal pattern 1 and pedal pattern 2 (p < 0.01).
2. There was no statistically significant difference between operation using a bFaaaP and operation using their own leg (p > 0.05).
3. There was no statistically significant difference between those who had 5 years or more piano experience (Group I) and those who did not (Group II).
4. Also there was no statistically significant difference among the subject classes.
5. However, there was a statistically significant difference among different pianos used (K132 (Steinway&Sons), GC1 (YAMAHA), and UX (YAMAHA)）.