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Coming soon: The Multiwave Mega

8/23/2019

9 Comments

 
For many months now, I've spent hundreds of hours working on a new DIY project - The Multiwave Mega. I'm very happy to say that the developement is finally done, and I'm just waiting for the prototype PCB to arrive so it's hopefully not too far until release.

The Mega is a guitar synth that is quite different than anything I have done before.
​It's a analog/digital hybrid. On the analog side we have a preamp, sample and hold (for infinite sustain aka "drone mode") and a resonant lowpass filter, and on the digital side we have a microcontroller that handles two oscillators, filter envelopes and an LFO.

Key features:
* Two oscillators with several waveshapes that can be blended together and detuned
* Resonant filter with envelope control that can be triggered by the guitar input
* Sustain mode, which will hold a note forever. It can also be triggered by the guitar
* LFO with different waveshapes for modulating the amplitude and/or frequency

The oscillators are wavetable based, which means that every waveshape is stored as a series of numbers that represents voltage over time (PWM duty cycle) for a single waveshape cycle. It has a 6-bit resolution (64 steps) for the oscillators and the LFO,
and a 7-bits resolution (128 steps) for the filter envelopes.
​
More info coming soon!
Here's a short video where i'm playing around with the Mega on the breadboard, in drone mode with the LFO going to create some interesting sounds.
Picture
Faceplate graphics
Picture
A rendition of the PCB
9 Comments
Alon Cohen
8/24/2019 03:07:17 pm

Can’t wait for this one :-)

Reply
Mike
8/28/2019 10:22:43 pm

I NEED THIS IN MY LIFE

Reply
FRESHA link
9/3/2019 05:43:51 am

Oh yes bring this asap :D my racks are calling...

Reply
Bobbyd67
9/20/2019 12:05:23 pm

Its been almost a month !!!!!! We need thiiiiiis !!! Next time Fred keep it a secret the anticipation is killing me !

Reply
James link
9/27/2019 08:38:30 am

I too, would love to order and build my very one multiwave mega. I’ll even put a “toaster” head in the graphic.

Reply
timo link
10/10/2019 07:30:28 pm

that triangle wave is the shit!! gotta have this, anyway your gonna add cvs?? anyway the lfo goes into audiable range?? if not im buying it anyways forsure.

Reply
Gabe
4/18/2020 05:58:55 pm

Where can I get that mini display?

Reply
Fredrik Lyxzen link
4/20/2020 03:22:36 am

Hi Gabe,

Check out this thread in the Madbean Forum:
https://www.madbeanpedals.com/forum/index.php?topic=30211.0

It has more info about the display ect.
Cheers / Fredrik

Reply
Lakers Jacket link
2/25/2023 11:47:12 pm

Some truly wonderful work on behalf of the owner of this internet site , perfectly great articles .

Reply



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