Simple synthesizer for Axocontrol

#1

I've created a simple substractive synthesizer with parameters assigned to Axocontrol knobs and buttons. There is a total of 24 controllable parameters (using 6 knobs) divided into 4 pages. Button A - jump to next page, B - previous, C - gate (useful when there is no midi keyboard connected). Led 0 on = gate high, led A on = page 1, led B on = page 2, led C on = page 3, ABC leds off = page 4. Joystick up-down = modulation amount (100%/-100%), left-right = pitch bend

synth1.PNG1781x748 149 KB

AXOCONTROL_synth1.axp (93.1 KB)

Page 1 (oscillator)
knob1 - LFO1 amount (pitch)
knob2 - tune (semitone steps)(useful when there is no midi keyboard connected)
knob3 - waveform mix (saw/pulse)
knob4 - manual pulse width control
knob5 - LFO2 amount (PWM)
knob6 - suboscillator level

Page 2 (low pass filter)
knob1 - resonance
knob2 - envelope amount
knob3 - LFO3 amount (cutoff)
knob4 - cutoff
knob5 - envelope attack time
knob6 - envelope decay time

Page 3 (amp)
knob1 - distortion (disconnected - need to work out the levels)
knob2 - envelope sustain level
knob3 - volume
knob4 - envelope attack time
knob5 - envelope decay time
knob6 - envelope release time

Page 4 (modulation)
knob1 - not connected
knob2 - not connected
knob3 - not connected
knob4 - LFO1 frequency
knob5 - LFO2 frequency
knob6 - LFO3 frequency

The challenge was to mux the knobs so that single knob could be reassigned to control number of parameters - that is happening inside the patcher_1-6 (it can be easily modified to mux8 - giving control over a total of 64 parameters (page number could be indicated by leds A-C in binary))

The only problem so far is page switching as increase-decrease inlets of the counter are not working correctly (counting up goes 0-1-2-3, while counting down goes 3-2-1-0-4)

259 inspired polyphonic synthesizer
Axocontrol multiple pages
#2

Followed the link from your 259 inspired patch. I'm about to get an Axocontrol in the mail. I totally dreamed up this same idea of using a MUX to remap the Axocontrol's knobs. (I'm sure it's uncommon). Even had the same idea of displaying the "page" in binary using the LEDs.

I'll be loading up this patch and your 259 patch when it arrives.

Have you thought about trying out an additional display to make paged parameters more friendly? I've always dreams of having a Nord Modular G2 - that display with the rotary leds make me drool.

#3

One of the reasons I love Axocontrol is it's size, it can (almost) fit in my pocket, additional screen would be useful to see the actual value of the parameters but will made the whole thing bigger. A solution would be to limit it do 3-6 characters (similarly like on the Microkorg). One thing I'm still missing is a proper enclosure (I've seen some ideas in the Axocontrol thread).

One thing about the clarity of the patch is that later on I've decided to add modesource sends on the outputs of the patcher_1 to 6 rather than visual cable connection, this way its cleaner and makes it easier to scale the parameter value according to controller range. :slight_smile: