The Roland HandSonic HPD-15 hand drum includes some tuned percussion instruments. You can edit the pitch of each pad in cents. The pads are grouped into 3 sets of 5, as shown:

HPD-15-pads

You can edit the pitch of each pad individually, and further adjust the pitch of an entire set (A, B or C). The pad set adjustment is very helpful when creating a patch for any HPD-15 instrument that is voiced for a higher or lower octave.

After several experiments, I finally settled on this arrangement of the Bohlen-Pierce scale notes. It is fully chromatic from D to D’. I didn’t include a low Db as it seemed less important than the high D’ for modal music.

Handsonic-BP-pads

I tuned the notes to the C Lambda scale in just intonation with A=440 Hz (pad A2). The first song recorded with this system was Fuse Blue. The HPD-15 is somewhat buried in the final mix. I’ve created a separate MP3 file of just the HandSonic tracks so that you can hear what it sounds like:

I’m happy to answer any technical questions from other HandSonic players who are into BP or other alternate scales. The HPD-15 isn’t a real sensitive instrument, but its fine tuning capabilities make it a very useful tool for creating a variety of sounds in real time performance.  I advise using a good frequency meter when tuning, as the readout of cents isn’t really very accurate.  The tables below contain the fine tuning adjustments that I developed for several of the unit’s virtual instrument voices.

C Lambda Just Intonation on Roland Handsonic HPD-15
Midrange Voicings A49:Gender T43:SynStrings S13:Drip
note frequency pad cents pad cents pad cents
C2 188.57 Hz A5 -567 A5 -1767 A5 -1768
Db2 203.66 Hz -433 -1634 -1631
D2 224.49 Hz A3 -265 A3 -1464 A3 -1464
E2 242.45 Hz A4 -132 A4 -1332 A4 -1331
F2 264.00 Hz A1 +16 A1 -1184 A1 -1175
Gb2 288.63 Hz B1 +170 B1 -1030 B1 -1030
G2 314.29 Hz B2 +317 B2 -881 B2 -874
H2 339.43 Hz B3 +451 B3 -748 B3 -744
Jb2 369.60 Hz B4 +598 B4 -602 B4 -600
J2 404.08 Hz B5 +753 B5 -448 B5 -436
A3 440.00 Hz A2 +900 A2 -298 A2 -290
Bb3 475.20 Hz C1 +1033 C1 -166 C1 -161
B3 523.81 Hz C2 +1202 C2 +2 C2 +8
C3 565.71 Hz C3 +1335 C3 +135 C3 +135
Db3 610.97 Hz C4 +1469 C4 +268 C4 +269
D3 673.47 Hz C5 +1637 C5 +439 C5 +439
High Voicings T66:Fantasia
note frequency pad cents
C3 565.71 Hz A5 -1073
Db3 610.97 Hz
D3 673.47 Hz A3 -770
E3 727.35 Hz A4 -638
F3 792.00 Hz A1 -490
Gb3 865.89 Hz B1 -335
G3 942.86 Hz B2 -188
H3 1018.29 Hz B3 -55
Jb3 1108.80 Hz B4 +94
J3 1212.24 Hz B5 +246
A4 1320.00 Hz A2 +395
Bb4 1425.60 Hz C1 +530
B4 1571.43 Hz C2 +705
C4 1697.13 Hz C3 +828
Db4 1832.91 Hz C4 +965
D4 2020.41 Hz C5 +1133
Low Voicings T34:FunkBass T33:FingBass T01:Ac.Piano
note frequency pad cents pad cents pad cents
C0 20.95 Hz set -700
Db0 22.63 Hz
D0 24.94 Hz -1668
E0 26.94 Hz -1548
F0 29.33 Hz -1388 A1 -1388
Gb0 32.07 Hz -1232 B1 -1232
G0 34.92 Hz A5 -1086 B2 -1086
H0 37.71 Hz  A4 -954 B3 -954
Jb0 41.07 Hz A3 -805 B4 -805
J0 44.90 Hz A3 -652 B5 -652
A1 48.89 Hz A1 -506 A2 -506
Bb1 52.80 Hz B1 -372 C1 -372
B1 58.20 Hz B2 -202 C2 -202
C1 62.86 Hz B3 -70 A5,C3 -70 A5 -1767
Db1 67.89 Hz B4 +63 C4 +63 -1634
D1 74.83 Hz B5 +232 C5 +232 A3 -1464
E1 80.82 Hz A2 +365 A3 +365 A4 -1332
F1 88.00 Hz C1 +512 A4 +512 A1 -1184
Gb1 96.21 Hz C2 +668 B1 -1030
G1 104.76 Hz C3 +815 B2 -881
H1 113.14 Hz C4 +948 B3 -748
Jb1 123.20 Hz C5 +1096 B4 -602
J1 134.69 Hz B5 -448
A2 146.67 Hz A2 -298
Bb2 158.40 Hz C1 -166
B2 174.60 Hz C2 +2
C2 188.57 Hz C3 +135
Db2 203.66 Hz C4 +268
D2 224.49 Hz C5 +439

Handsonic-F-Bass Handsonic-G Bass

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