traigh [Custom Shop Brass]

Transistor Ladder Voltage Controlled Low-Pass Filter

Tràigh is a classic transistor ladder low pass filter. (24dB/octave)

Derived from classic East coast designs, the Tràigh is suited for creating fat, warm subtractive voices.

With its built in 3 channel mixer, the design is optimised for summing multiple audio signals and softening them into a a single warm, comforting bed of sound.

Nothing quite beats the comforting sound of multiple rich sawtooths softened by a warm, squelchy filter!

The Tràigh is based on classic discrete circuit designs pioneered by Moog in the 70s. The only op-amps are used at the mixer summing stage and for buffering the output signal. Everything else is transistors and fat caps.

The approach in sonic character is vintage through and through.

Input signals will hit approximate unity level when channel faders are at the midway point. Increasing them will add gain in a soft wave-shaped manner.

With resonance maxed out, the Tràigh will self oscillate with a stable sine wave.

With rich input signals the resonance will tighten up the cut-off slope and accentuate overtones from a soft squelch to full blown formant madness when a touch of FM is introduced.

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