MFOS Seven Segment Linear Envelope Generator

Music From Outer Space has introduced a new synth DIY project, the MFOS Seven Segment Linear Envelope Generator. 

The MFOS Seven Segment Linear Envelope Generator provides from 2 to 7 linear segments you use to design a voltage envelope to control analog synth modules. The slope and threshold for each segment is settable.

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How To Build A Laser Piano

how-to-build-a-laser-pianoElecFreaks has put together a DIY tutorial on how to build a laser piano.

Their laser piano is pretty MacGyver’d – housed in a cardboard box. But you could use their same approach to build the instrument in a sturdier case or even to make a laser harp.

Here’s a demo of the DIY laser piano in action: Continue reading

DIY Kit Recreates Classic Moog Modular Filter

grove-audio-moog-filter-kitGrove Audio has announced the GMS-294a VC Low Pass Filter – a faithful recreation of the classic Moog 904a 4 Pole Transistor Ladder filter.

The filter incorporates the same audio path and transistors used in the original filter, designed by Robert Moog. The GMS-294a adds an attenuator on the audio input and an attenuated CV input as well as a 1 Volt/Octave frequency control input.

The manual resonance control causes a peak in the low pass response and if increased to near maximum will cause the filter to go into sine wave oscillation. Continue reading

Jellyfish V2 Modular Delay For Eurorack Synthesizers

jellyfish-modularPlankton Electronics has released the Jellyfish V2 Modular - a PT2399 based delay in Eurorack format.

With 17HP it includes an input pot with saturation red led, a mix section, a LFO with an external output, Time, Fine and Feedback controls with infinite feedback, a sync input and many modulation possibilities.

Controls:

  • IN: attenuator for the incoming signal. The associated red led will start to glow just a few mV before the signal is clipping inside the delay IC. Note that when extreme feedback is used the led will glow independently of the incoming signal.
  • WET & DRY: mix pots for the signals. WET control the amount of delay sent to the output while DRY sends the input signal directly to the out.
  • TIME & FINE: delay time pots. The main control of the module. Turn it to get delay times from 27 to 570 mseg. NOTE: When powering up the machine these controls can not be in it’s lower position or the IC will not work. Turn it up a little bit before.
  • FDBCK: feedback control. This is the amount of delayed signal that is send again inside the delay. It goes from 1 repetition to infinite.
  • RATE: The frequency of the LFO.
  • DEPTH: The amount of LFO signal that is sent to the time parameter of the delay. Very useful for create vibrato effects or other crazy deep sea sounds.
  • WAVE: choose between a square or triangle wave for the LFO.
  • CV TIME: attenuator for the incoming CVT signal.
  • CV FDBCK: attenuator for the incoming CVF signal.
  • CV WET: attenuator for the incoming CVW signal.

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