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Tiptop Audio Buchla 259t Programmable Complex Waveform Generator Eurorack Module , $559.00 - Add to Cart Skip to Product Information

Tiptop Audio Buchla 259t Programmable Complex Waveform Generator Eurorack Module

34HP Eurorack Waveform Generation Module with 2 Oscillators, Harmonics/Timbre Sculpting, 3 Waveshaping Modes, FM, Keyboard Control, CV/ART-format Compatibility
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Tiptop Audio Buchla 259t Programmable Complex Waveform Generator Eurorack Module
Tiptop Audio Buchla 259t Programmable Complex Waveform Generator Eurorack Module

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Tiptop Audio Buchla 259t Programmable Complex Waveform Generator Eurorack Module
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Built by Buchla, Reimagined for Eurorack Excellence

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Our Product Research Team

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Don Buchla’s legacy of innovation has spurred countless leaps of sonic imagination, daring sound designers and synthesists alike to challenge the conventions of how we interface with sound and express our artistic vision. The 259t programmable complex waveform generator continues Tiptop Audio’s ongoing collaboration with Buchla, honoring the late legend’s enduring spirit by painstakingly preserving the quirks, character, and creativity of the Buchla 200-series modules while transforming them for explosive Eurorack possibilities. At 34HP, the 259t — like the Buchla 259 before it — is a dynamic, dual-oscillator module that’s teeming with sonic contouring capabilities, with a triplet of waveshaping modes and extensive FM tools supplemented by a multifaceted I/O of CV and ART connections, alongside Timbre and Harmonics sculpting controls. Across its multi-modal modulation possibilities and limitless, latent interoperative potential, Sweetwater’s synth scholars are fascinated by the exacting accuracy Tiptop Audio has achieved in transforming the modular magic of Buchla for Eurorack without sacrificing the exploratory spirit of its predecessor.

Note: This module is not compatible with Buchla system voltages. CV and ART formats require distinct connectivity configurations. Please contact your Sweetwater Sales Engineer with any questions or concerns regarding compatibility or use in your Eurorack case.

Discover the genius of Buchla

One of Don Buchla’s most divisive takes on synthesis and music making was his aversion to traditional keyboards. In his ambition, Buchla developed instruments untethered from the normative modes of thinking about, composing, performing, and recording music. Tiptop Audio’s Buchla 259t Programmable Complex Waveform Generator brings this transcendent thinking to the near-limitless possibilities of Eurorack synthesis. The dual-oscillator design is built on a Principal and Modulation oscillator. The former is a CV-adjustable audio rate oscillator capable of sine waves, square waves, or infinite numbers of complex waveforms when using the Timbe and Harmonics section. With the latter, low and high modes let you instantly toggle between LFO and audio-rate oscillations. Moreover, each oscillator can be individually toggled to be controlled via 1-volt/octave CV or Tiptop Audio’s groundbreaking ART signal format. The 259t has no shortage of complexity across multiple modulation waveshape, a suite of CV and FM inputs, multiple simultaneous per-oscillator outputs, phase locking, dedicated Gate outputs, and individuated amplitude, pitch, and timbre modulation. However, in the infinite nature of its inter- and intra-modular magic, the 259t also has no shortage of creative possibilities.

Discover the ART of next-gen synthesis

What is ART? In short, it’s the next stage of Eurorack’s evolution. More expansively, it’s the brainchild of Tiptop Audio founder Gur Milstein, marking a groundbreaking, open-spec control signal technology that expands the sonic scope of modular synthesis possibilities. Utilizing ART-capable modules allows synthesists and sound designers to explore complex modular terrains, including polyphonic Eurorack synthesis and inventive modular arrangements through paired gate or velocity outputs. Because ART modules utilize Eurorack signal levels for both oscillator audio and CV/gate controls, alongside sharing the same power connectors, these can be seamlessly intermixed with standard Eurorack gear via 3.5-millimeter patch cables. Unlike the Eurorack-standard 1V/octave model, ART signals transmit multiple dimensions of information with near-zero latency, including velocity, modulation, and pressure values, as well as precise pitch information.

At its core, the ART signal replaces the prohibitively tricky, time-consuming, and creatively stifling method of tuning modules with 1V/octave CV. Select ART modules feature innovative connectors that utilize Tiptop Audio’s custom-developed Polytip patch cables, directly enabling polyphonic performances via lightning-fast transmission of detailed information between modules. So, why create with ART? This framework unlocks the full potential of the Eurorack modular architecture by solving the artistic, harmonic, and structural woes that were an inevitable outcome of the space’s nascent technological limitations. In other words, ART expands Eurorack without compromising the spirit that’s inspired countless musicians for decades, producing exciting vectors to summit the previously insurmountable heights of modular synthesis.

Tiptop Audio Buchla 259t Features:

  • Reimagines the classic 200 series Buchla module for Eurorack format, preserving all the quirks, character, and capabilities that defined the original’s innovative output
  • 34HP form factor blends eye-catching aesthetics with multitudes of modulation capabilities
  • Dual-oscillator architecture supports control from both CV and Tiptop’s proprietary ART signal format
  • Per-oscillator FM inputs, alongside CV-controllable modulation index and per-oscillator fine tuning mean immense versatility in interoperative integration
  • Modulation Oscillator features 3 waveshapes and dedicated modes for LFO and audio-rate use
  • Principal Oscillator includes 3 simultaneous waveform outputs for imaginative and exploratory sound design
  • Dedicated toggles for phase lock, amplitude modulation, pitch modulation, and timbre modulation expand your aural horizons with deeper, customizable behavioral control
  • Harmonics and Timbre section facilities multitudes of sonic contouring via CV or manual attenuation

Warranty Info

Sweetwater's FREE 2-Year Total Confidence Coverage Warranty

Extra peace of mind at no extra cost.

  • Save money with FREE parts and labor
  • Get back to making music with the industry's fastest turnaround time
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Learn More about Total Confidence Coverage

Offer applies only to single-receipt qualifying purchases. Select manufacturers may require that only the manufacturer’s products qualify towards the minimum purchase amount needed to be eligible for promotional financing. Otherwise, an invoice that meets the minimum purchase amount and contains at least one qualifying manufacturer product is eligible for promotional financing. No interest will be charged on promo purchase balance, and equal monthly payments are required on promo purchase until it is paid in full. The payments equal the amount financed divided by the number of months in the promo period, rounded up to the next whole dollar. These payments may be higher than the payments that would be required if this purchase was a non-promo purchase. During the last month(s) of the promo period the required monthly payment may be reduced due to the prior months’ rounding. Regular account terms apply to non-promo purchases. New Accounts as of 07/31/2025: Purchase APR is 34.99%. Penalty APR is 39.99%. Min Interest Charge is $2. Existing cardholders: See your credit card agreement terms. Subject to credit approval.

Offer applies only to single-receipt qualifying purchases. No interest will be charged on the promo balance if you pay it off, in full, within the promo period. If you do not, interest will be charged on the promo balance from the purchase date. The required minimum monthly payments may or may not pay off the promo balance before the end of the promo period, depending on purchase amount, promo length and payment allocation. Regular account terms apply to non-promo purchases and, after promo period ends, to the promo balance. New Accounts as of 07/31/2025: Purchase APR is 34.99%. Penalty APR is 39.99%. Min Interest Charge is $2. Existing cardholders: See your credit card agreement terms. Subject to credit approval.

The estimated required monthly payment shown which excludes taxes and delivery equals the amount financed divided by the number of months in the promo period, rounded up to the next cent. During the last month(s) of the promo period the required monthly payment may be reduced due to this rounding. These payments apply only with the financing offer shown. If you make these payments by the due date each month, you should pay off this amount financed within the promo period, if it is the only balance you are paying off. If you have other balances on your account, this payment will be added to any other minimum monthly payments.

Applies only to select items from this manufacturer. Ask your Sweetwater Sales Engineer for more details.