Grove 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
Grove Audio has introduced the GMS777 Voltage Sequencer – a 2×8 or 1×16 step sequencer, which produces a CV output and gate output per channel.
Each channel has a clock input and a separate reset input. Several step functions are programmable using a push button and LED for each step. Stop and skip can be programmed for each step.
There is a separate switchable quantizer for each channel. The output voltage range 0-2V, 0-5V, and 0-10V is selectable from the panel. The module will also support the “Q” bus modules and interface.
The unit will be available in MU, in MOTM and in EURORACK configurations all running about $350.00 range. Pre-orders for delivery in March can be made through an Indiegogo crowd-funding project. The purchaser will have the option of selecting format and knob styles, including the new custom-molded Davies 1900 knobs in ivory.
Grove Audio has posted information on their BusyBox synthesizer.
Here’s what they have to say about it:
This 6MU module contains a complete synthesizer voice and an internal MIDI to CV converter. Internal routing is roughly based on the Moog Minimoog Model D.
An analog routing system controlled by a processor offers alternative routing schemes to extend the usefulness of the unit as a standalone synthesizer. A couple of extra features not found on the Minimoog have been added such as ring modulator, linear FM modulation of the VCOs, and voltage controlled amplifiers on each VCO and external audio sources.
The MIDI to CV converter can produce up to four CV/gate pairs and internal control voltages based on channel control messages from an external sequencer or keyboard controller can extend or replace internal modulation sources for the VCOs, the audio mixer or the filter.
The filter core is a 4 pole low pass filter which feeds a signal matrix and analog switch that allows one of sixteen possible filter modes to be selected. Two envelope generators can be used to modulate parameters of the filter and apply a contour to the main audio output VCA.
The depth of modulation can be controlled by the modulation wheel of a connected MIDI keyboard controller.
Pricing and availability are to be announced.