Tuesday 5 July 2022

Eurorack "Moog" Modular

Having started with "Moog" modules in eurorack just over a year ago, my planned two cases are now complete:

I orginally planned this as a Moog IIIC lookalike. I made the decision that the lower ("console") row would be normal eurorack height, not the reduced module height used in the original (5U high) Moog modular.

Key to modules: (B) Behringer, (F) Fitzgreyve, (A) AMSynths:

Top cabinet:
(B) 914, (F) 992, (B) 904A, (F) 904C, (B) 904B, (B) 904A with AMSynths daughter board, (B) 994, 2 x (F) 911+, 3 x (B) 902, (A) 993, (B) 911, (B) 911A, 2 x (B) 911.

Bottom cabinet, upper row:
(F) 901ABBB, (F) 901ABBC, (F) 901, (B) 921, (B) 995, (B) 960, (B) 962, 2HP Tune

Bottom cabinet, lower row:
2 x (F) CP3, (F) CP3A, (B) 923, (B) 961, (A) 924 mixer PCB with (F) panel.

The cases are recycled vintage mahogany. I've already got more modules than case space, so another case is being build. Not fitted, lying on top: (F) 991, spare (F) 901B, another (B) 921.

Sunday 3 July 2022

911+ Envelope Generator


The Behringer 911 Envelope generator is excellent value for money, but suffers from difficulty getting values at the extremes of control travel due to the use of budget potentiometers. This is particularly a problem at the low end of the T1,T2, T3 controls which leads to difficulty in setting short envelope times. The panel control values also do not generally match the actual envelope times.

This module is designed to address the above issues, add some additional functionality (looping modes, linear envelopes, "Punch", Time and Level modulation), while maintaining the Behringer System 55 “look and feel”.

The Fitzgreyve 911+ uses nothing resembling the original Moog circuit, being based on a PIC microcontroller. Single PCB, all through-hole components.




ADR envelope in LFO mode.