Tiptop Audio / Buchla 281t Quad Function

The Quad Function Generator 281t is a quad function generator that can generate complex CV signals. The module consists of 4 function generators. You can use each one independently, or mix the pairs of channels A and B, and channels C and D to generate complex waveforms.

The Quad Function Generator 281t is a quad function generator that can generate complex CV signals. The module consists of a 4-channel function generator. You can use each channel independently, or mix the pairs of channels A and B and C and D to generate complex waveforms.

■Three types of operation modes
Each channel has three operation modes, and you can set different operation modes for each.

The attack and decay times can be set from 0.001 to 10 seconds.

■Transient mode
Input a trig gate signal or press the trig button to operate with manual trigger. When the gate is ON, the CV rises to its maximum value in the time set by the attack knob, and then falls to 0 in the time set by the decay knob. This operation mode is also called ""AR envelope"".

■Sustained mode
Input a trig gate signal or press the trig button to operate with manual trigger. When the gate is ON, the CV rises to its maximum value over the time set by the attack knob, and the CV remains at its maximum value while the gate is ON. When the gate is OFF, it falls to 0 over the time set by the decay knob. This operation mode is also called the ""ASR envelope"".

■Cyclic mode
This mode repeats the attack and decay phases regardless of the gate. The repeat speed changes depending on the time set by the attack and decay knobs. You can also switch Cyclic mode ON/OFF by inputting a gate to the dedicated cycle jack.

■Channel control and output
Attack and decay can also be controlled by external CV. The CV generated by each channel is output from the blue jack on the right. At the same time, a pulse is output from the red jack when the decay phase reaches 0. Both outputs can be visually confirmed by the LEDs to the right of the jacks.

■QUADRATURE mode
The QUADRATURE section on the right side of the panel allows you to generate complex waveforms. When QUADRATURE mode is turned on, the phase of each pair of channels A and B, and channels C and D is shifted by 90 degrees. This function can be switched on/off with a switch. The blue jack at the top outputs the result of ORing each output (outputting the higher voltage side). The mix level of channels B and D can be controlled with a knob.

[About Buchla & Tiptop Audio ""Eurorack 200 Series""]
The ""Eurorack 200"" series was born from a collaboration between Tiptop Audio and the legendary synthesizer manufacturer ""Buchla"" on the West Coast of the United States. 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 breeze to your modular system.

Width: 28HP
Depth: 32mm
Current consumption:
+12V: 160mA
-12V: 55mA