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Build a Drum or Filter Module!

Hosted by Modular for the Masses
Sunday, Sept 11 @ 12pm
Difficulty: Easy
This workshop features 2 separate modules - build one, or both!

Double Plus Bass Module Build

The DoublePlusBass is a full featured kick drum inspired by Thomas Henry's Bass+.

This module can make a wide range of sounds. The waveshape can be adjusted from the slightly spiked triangle, through a sine wave, to a folded square wave. Buzzy to clean to filthy. The decay can be wood-block short, up to absurdly long, especially if you choose to build your copy with a larger capacitor. The sweep height and sweep decay controls offer the ability to dial in everything from kick drums to disco tom sounds with varying decay. Change the character of the decay with the 808/909 control. The Double Plus Bass also offers control of the attack sound, be it a sharp spike or thump and how loud that sound will be.

Customize your build with some through-hole parts, specifically a resistor which limits how high the pitch can go, a film capacitor which can set the range of how low the pitch can go, and one of the electrolytic capacitors will set the maximum length of the decay.

FEATURES:

  • Voltage control of the VCO base pitch
  • LED indicators of envelope when sound is active
  • Volume control of output
  • Envelope out - use this with a VCA to duck other signals

This kit includes a PCB/Panel Set with all the board components pre-soldered, only the mechanical parts needs to be assembled.

TO PARTICIPATE IN THIS WORKSHOP
You will need to purchase the Double Plus Bass Kit from Modular for the Masses by sending $75 via paypal by clicking THIS LINK and put Double Plus Bass Workshop in the description.

Some kits may be available for purchase on-site, however, you can secure your place in the workshop by pre-ordering your kit.

Mantis Ladder Filter Build

The ManitsLadder is a classic diode ladder with a few twists.

First, it uses precision stable voltage references for several important parts of the circuit. Ladder filters are particularly vulnerable to power rail noise, and this banishes that particular source of noise far far away.

Another quirk of ladder filters is that they lose amplitude when the resonance is turned up. While prototyping this, I was pleased to find that this behavior could be banished far far away also, with just a simple resistor.

It's easy to heavily overdrive the input of this filter, which sounds wonderful. It's possible to saturate the output of this filter, adding even more analog "warmth" to whatever you're putting through this. The volume knob goes from zero to full volume by the time it reaches about 2 o'clock, and after that it's soft-clipping the output against a pair of diodes.

Okay, here's one of the best knobs on this filter: the Inversion knob. This knob feeds an inverted copy of the input signal into the output buffer. If this filter was well behaved and linear, this knob could turn this into a reasonable high-pass filter. And if you're careful, you can get that kind of behavior out of this module. But if you're not careful, you can mellow a signal right out with the overdrive, filtering and saturation options available, but then bring the harsh sharp-edged features of the incoming signal back in with that Inversion knob. Experimentation is strongly encouraged..

This kit includes a PCB/Panel Set with all the board components pre-soldered, only the mechanical parts needs to be assembled.

TO PARTICIPATE IN THIS WORKSHOP
You will need to purchase the Mantis Ladder Kit from Modular for the Masses by sending $70 via paypal by clicking THIS LINK and put Mantis Ladder Workshop in the description.

Some kits may be available for purchase on-site, however, you can secure your place in the workshop by pre-ordering your kit.

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