WHEELSOUNDplays Felucca's organWHEEL
WHEEL is Felucca's tonewheel organ: pick a drawbar registration from a list, shade it with three knobs, and add percussion, key click, drive and a rotary speaker.
plays Felucca's organ
- Half
- SOUND
- Reach it
- a custom build, FELUCCA_WHEEL=1 (else on ANALOG)
- ALGORITHM
- REG
- Engine
- WHEEL
- Factory sounds
- 5
Playing it
REG on MAIN picks a registration, a preset setting of all nine drawbars (FLUTE, GOSPL, ROCK, FULL and others). PERC adds the struck 2nd or 3rd harmonic, normal, soft or slow; it is single trigger, so only a note started with no other key held gets it. DRV is a soft overdrive on each voice. ROTR spins a rotary speaker SLOW or FAST, and the rotors ramp between the speeds rather than jump.
WHEEL is on the sidelines: SQRL-1's build leaves it out. A custom build with FELUCCA_WHEEL=1 brings it back, picked on the PAIR page (hold HOME, tap GLO, KNOB 1). Without it, a WHEEL sound in a project or a saved sound plays on ANALOG.
MAIN
| Knob | Label | Range | Starts at |
|---|---|---|---|
| 1 | REG | 16 valuesFLUTE MELLO HOLLW SMOOT 3BAR BLUES GOSPL ROCK TOPS CLARI REED STRNG CHAPL BRITE BASS FULL | FULL |
| 2 | PERC | OFF 2ND 3RD 2SOFT 3SOFT 2SLOW 3SLOW | OFF |
| 3 | DRV | 0% .. 100% | 16% |
| 4 | ROTR | OFF SLOW FAST | SLOW |
Pages
BARS
SUB, BODY and TOP raise or lower groups of the registration's bars: SUB the 16' and 5-1/3', BODY the 8' and 4', TOP everything from 2-2/3' up. Louder registrations give each bar a little less, so a full organ is louder than one bar without clipping.
| Knob | Label | Range | Starts at |
|---|---|---|---|
| 1 | REG | 16 valuesFLUTE MELLO HOLLW SMOOT 3BAR BLUES GOSPL ROCK TOPS CLARI REED STRNG CHAPL BRITE BASS FULL | FULL |
| 2 | SUB | -8 .. 8 | 0 |
| 3 | BODY | -8 .. 8 | 0 |
| 4 | TOP | -8 .. 8 | 0 |
TONE
CLICK is the burst of noise at the key contact. With PERC on, the 1' bar falls silent and, at normal level, the other bars drop about 3 dB, as on the original circuit.
| Knob | Label | Range | Starts at |
|---|---|---|---|
| 1 | PERC | OFF 2ND 3RD 2SOFT 3SOFT 2SLOW 3SLOW | OFF |
| 2 | CLICK | 0% .. 100% | 24% |
| 3 | DRV | 0% .. 100% | 16% |
| 4 | ROTR | OFF SLOW FAST | SLOW |
Factory sounds
- FULL ORGAN
- JAZZ PERC
- GOSPEL
- SOFT FLUTE
- ROCK DRIVE
WHEEL and ORGAN
Both are tonewheel organs. WHEEL works from a list of registrations with three shading knobs and has its own drive and rotor; it plays nine sines per voice. ORGAN sets each drawbar directly (the top three as one) and reads one wavetable a voice; it has no rotor, so it pairs with the ROTOR insert.
Where it comes from
firmware/src/eng_wheel.c, Felucca's own design (GPL-3.0), by Leo Kuroshita, Hügelton Instruments.