-
GS1-F
The GS1-F low pass/high pass filter module is based on Roland’s 4 pole filter design using the BA662 differential op-amp circuit. The classic buttery, self resonating filter sound as present on many of Rolands classic analogue synths of the 70’s and 80’s. As discussed on the GS1-A page, the BA662 has become almost un-obtanium in…
-
GS1-A
The GS1-A and its smaller brother the GS1-A2 are based off the design of Roland’s System 100M series of modular synth modules. The heart of these modules is the BA662 differential op-amp that Roland used in just about everything in the late 70’s and into the 80’s. The BA662 is no longer available, but Open…
-
TB-EFA
The TB-EFA shares the same ‘3 and a bit’ pole filter circuit as the Roland TB-303. It also provides a complete version of the envelope used by the 303 with decay control. Rounding off the module is the BA662 based VCA circuit which is also controlled by the same envelope as the filter. Like the…
-
TB-EF
The TB Filter Envelope module is inspired by the filter, envelope and accent circuits of the Roland TB 303. It copies the same 3 and a bit pole low pass filter and most importantly the resonance feedback loop. Like the original it has pots to control the Cutoff Frequency, Resonance and Envelope Modulation. These are…
-
TB-O
The TB-O shares the same saw-core oscillator circuit as the Roland TB-303. It also generates the distinctive, not quite square using the same technique as the original, including making use of the same transistor types – afterall, the name is Transistor Bass… The module can output four waveforms simultaneously, all controlled by the same single…
Ge0sync Synth 