L-1 modules

l-1_logoBelarusian electronics designer Alexey Laman manufactures Eurorack modules under L-1 trademark. His modules are highlighted both by himself and by community members as top-quality modules comparable to Cwejman products. The Company is founded in 2012. Today’s model range includes several dynamic effects (compressor, VCA, mixers), VCF and even vocoder! Modules can be purchased as fully-assembled units or as DIY-kits. In this review I’m going to introduce three L-1 modules at once: 2180VCF, Quad VCA/Mixer and Tube VCA. Continue reading

ACXSynth MIDI2CV Firmware v5.7

New version of alternative firmware for ACXSynth MIDI2CV has been released. Changes (from v. 5.5):

  • Pitch bend now works in all modes.
  • Aftertouch assignable to CV2 Out.
  • 2-voice Split mode at Channel +4 in Multitimbral mode.
  • 2-voice Intellectual duophonic mode at channel +5 in Multitimbral mode.
  • Fixed bug with Voice two acting as Trigger in polyphonic mode.
  • MIDI Clock Rate is now adjustable
  • Version display at startup (0101.0111)
  • Parameters can be stored into EEPROM

The first key pressed at Split mode channel defines split point (the most lower key of the upper zone). Lower zone goes to voice 1 and upper zone goes to voice 2. Split point is set each time when multitimbral mode is selected. Intellectual duophonic mode can be used with two identical voices. Converter analyzes each newly pressed key and assigns corresponding note to particular voice where most closer note was taken previously. This makes it possible to play douphonic parts with glide with no unwanted slew between the parts if there is sufficient space between the hands. This mode doesn’t require fixed split point, but there is no binding between voices and parts like in the split mode. When monophonic part is played, only one voice will be used, there is no unison! New version can be downloaded on the Project page

Thanks to all donators! I mean it, thank you, guys! I’m glad to create as perfect code and design as I can.

AVR Synth 16

avrsynth_picLast time I was telling about one Elby Designs module. So, let’s continue the Australian equipment subject with interesting product manufactured under same brand; AVR Synth. This is the virtual analog synthesizer working on AVR-family microcontroller. The firmware of this synthesizer is written in Assembly language. The code is open-source and schematic is also open. I’m going to tell about the original, 16-bit version and about few forks of this project.

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Microtonal Synthesizer

Russian musician-experimentalist Alex Pleninger has been working on this instrument for about a year. The synthesizer consists of three identical blocks. Each of them is based on digital synthesis core. Each core uses two ARM microprocessors. The blocks are controlled with three sensor keyboards: two with 25 keys and one with 50 keys. Capacitive sensors provide only touch sensivity. The scale of each of three blocks can be programmed via control panels. Scale is expressed as index and radicand of the root which determines number of pitches in the octave. Also, the coefficient of the frequency multiplication applied by each successive degree can be manually entered. All of this data is displayed on OLED displays. The instrument also has transpose switch and buttons to select attack and release time. Three sustain pedals can be connected. The interesting detail is that the synthesizer has no MIDI ports at all. (Pleninger is well-known for his hostility to MIDI)
The device is custom-made for one of the famous recording studios.

MFOS Eight Stage Phase Shifter

phase_shifter_3Music From Outer Space is probably most famous Synth-DIY website. It’s author, Ray Wilson has developed huge amount of various modules and can offer wide variety of DIY-kits: module PCBs, noise generators, complete modular synths and even vocoder. Today I’m gonna tell about Eight Stage Phase Shifter module which Eurorack version I had pleasure to build recently.

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