TipTop Audio 259T Overview

Generate complex waveforms with the Tiptop Audio Buchla 259T Complex Waveform Generator. This Eurorack module features two voltage-controlled oscillators (Principal and Modulation) a Timbre/Harmonics section, and a Modulation section including phase lock for smooth operation in unison modes. The module can be tuned manually or autotuned by way of Tiptop Audio’s ART technology system. A ribbon power cable is included.

Principal Oscillator

• The Principal Oscillator has three audio outputs: a fixed sine wave, a fixed Square wave and a Final output, which provides infinite complex waveforms via the Timbre and Harmonics sections.
• The Principal Oscillator runs at audio rate but its frequency range can be driven higher or lower with CV.
• It can also be switched from 1V/oct to ART.

Modulation Oscillator

• The Modulation Oscillator has a fixed Triangle waveform and a toggle selectable Signal output, which can be a triangle, square, or sawtooth waveshape.
• It can be switched from LFO (low-frequency oscillator) mode to a high-audio-rate oscillator. Additionally, it can be configured to receive incoming 1V/oct or ART signals.
• A CV output is also available for the Modulation oscillator.

Timbre/Harmonics Section In Timbre/Harmonics section there are 3 waveshapers in that section, and the knobs allow you to crossfade between their outputs and the VCO sine wave.

The wave shapers are:

• Wavefolder
• Sawtooth
• M shape (can be consider as square)

Modulation Section

• Phase Lock: the audio input jack has an attenuator pot, which phase locks thefrequency of this oscillator with the frequency of the input signal. If thefrequency of the input signal is close to or lower than that of the oscillator it willcause the oscillator to lock onto the frequency of the input signal. If the input has a higher frequency, theoscillator will lock onto the nearest subharmonic of the input frequency. This can be used to eliminatebeating between two oscillators tuned in unison, octaves or harmonics.
• In the Modulation section, the switches are internal connections from Modulation oscillator to the Principaloscillator FM, Timbre section, and Amplitude modulation.
• The Amplitude switch set to the right has no effect. When switched to the left, it will amplitude modulate thePrincipal oscillator with the Modulation oscillator as determined by the Mod Index setting of the attenuverter.
• The Pitch (Frequency Modulation) switch set to the left engages its modulation.
• Timbre Modulation is unique to this oscillators design and modulates the Timbre when set to the left.

Items Included

• TipTop Audio Buchla Model 259T Complex Waveform Generator Eurorack Module (34 HP)
• Ribbon Power Cable
• Limited 1-Year Manufacturer Warranty

Additional Resources

No additional resources available

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