Tiptop Audio / Buchla 257t Dual Voltage Processor

The algebraic operations possible on the Model 257 Dual Control Voltage Processor are addition, subtraction, scaling, inversion and multiplication, and it also has built in functionality for using a CV to crossfade between two input CVs.

The Model 257 Dual Control Voltage Processor consists of two identical CV processors, each of which outputs a CV according to the following equation. The voltage value of this CV is determined by the voltage values ​​of the multiple input CVs and the settings of the three knobs.

(Va x K) + ((Vb x (1-M)) + (Vc x M)) + V offset = V_out

The algebraic operations possible with this module are addition, subtraction, scaling, inversion, and multiplication. It also has a built-in function for using CV to crossfade between two input CVs.

■Functions
■Attenuverter
The [Va Input] terminal (leftmost on the panel) is the input terminal for the CV input to the [K] knob (attenuverter).
The [K] knob can scale the CV (Va voltage) input to the [Va] terminal positively or negatively.

■Crossfader
The [Vb Input] terminal (second from the left on the panel) is the input terminal to the left side of the crossfader.
The [+. 5] switch adds 5V to the CV (Vb voltage) input to the [Vb] terminal.
The [Vc Input] terminal (fourth from the left on the panel) is the input terminal to the right side of the crossfader.
-M scales the Vb voltage from 1 to 0 depending on the position of the [M] knob.
M scales the Vc voltage from 0 to 1 depending on the position of the [M] knob.
The [-M/M Input] terminal (third from the left on the panel = center) allows crossfading between Vb voltage and Vc voltage.
The position of the [M] knob and the voltage input to -M/M Input are added together to control the crossfade position.

■Offset
Turn the [V offset] knob to add 0 to 10V to any combination of Va voltage + Vb voltage + Vc voltage.

■ Output
The [Vout] terminal (right end of panel) is the sum of the attenuverter voltage, crossfader voltage, and offset voltage.

[About Buchla & Tiptop Audio ""Eurorack 200 Series""]
The ""Eurorack 200"" series was born from a collaboration between Tiptop Audio and the legendary West Coast synthesizer manufacturer ""Buchla"". The ""200 Series"", a very rare modular synthesizer developed about half a century ago, has been reproduced in Eurorack format. The Buchla module, the essence of West Coast style synthesis, is now available to many modern modular players. The Eurorack 200 series will bring a West Coast feel to your modular system.

Width: 14HP
Depth: 25mm
Current consumption:
+12V: 45mA
-12V: 22mA