Description
The GS1-E provides a small 4hp single fast triggering envelope modelled after the envelopes in the Roland System 100M Dual Envelope.
The envelope has pot controls for the usual ADSR portions and a manual gate trigger momentary push button. A CV gate can be used to trigger the envelope as expected and the module usefully provides 2 identical copies of the same envelope as well as one inverted copy.
Inspired by the BA662 IC used in classic Roland analog synths, the Ge0sync (GS) series 1 is a DIY option to get small hp equivalents to some of the Roland System 100M into your Eurorack. Making use of the BA662 clone available from Open Music Labs (OML) or in some cases the almost equivalent BA6110 IC which is not yet un-obtainium. The GS series 1 provides everything you need to build a classic analogue synth voice including utility and modulation modules including VCO, VCF, VCA, ENV and LFO. The VCO make use of the CEM3340 VCO IC as many of the original parts used in the 100M VCO are long since discontinued. The series also adds a simple mixer than can average or sum the inputs (so works for both CV and audio). All partial kits include a bonus passive multiple panel/pcb set.
GS1-F Features:
- ADSR pot controls
- Manual gate momentary switch
- CV Inputs: Gate
- CV Outputs: 2x envelope out, 1x inverted envelope out
- Bonus passive multiple panel/pcb set included
- Width: 4HP
This Panel & PCB set includes the following rare parts (Green in BOM):
- 3 x 2SA1015-GR
- 8 x 2SC1815-GR
- 2 x RC4558
GS1-F – BOM & Build Guide
