The partnership between Tiptop Audio and Buchla keeps unearthing rare pieces of modular heritage. The latest is the Model 277t, a Eurorack version of a delay-line module Don Buchla drew in 1972 and never finished. Tiptop started from the surviving original schematic to complete a project half a century in the making.
A clocked delay line, built for patching
The principle is a clocked digital delay line: the audio signal runs through a series of shift registers, and the clock speed sets the delay time. From that come delay, echo and pitch-shifting effects, plus a small three-channel audio mixer. The module offers several outputs tapped at different subdivisions of the line, or, in Tiptop’s words, “four points in time” to work with.
Where a classic delay hands you ready-made feedback and a wet/dry control, the 277t does the opposite: it has no built-in feedback loop or dry/wet. It’s up to you to patch the feedback, the blend and the routing. That deliberate philosophy explains Tiptop’s line about a module “not for the lazy”: it only really sings once folded into a thought-out patch.
A piece for seasoned modularists
The 277t isn’t a ready-to-use effect but a building block to integrate, in the lineage of the Buchla x Tiptop 200-series reissues. It’s aimed at the modularist who likes building their own effect chains rather than turning a “mix” knob. It’s also a heritage object: reviving an unfinished Don Buchla design has a historical value beyond the function itself.
You’ll recognise the logic of other recent modules that favour the gesture over the preset, like Expert Sleepers’ Forever audio freeze or the compact semi-modular approach of the Atomosynth Mochika X7: tools that reward patching rather than quick tweaking.
Availability and price
Shown at Superbooth 2026, the 277t is announced around 299 euros as a pre-order. It takes up 16 HP and sits in the 200-series range of the Buchla x Tiptop collaboration, alongside the other reissues already out. A contained price for a piece that’s as much a tool as a collector’s object.
My take
This is exactly the kind of module that splits opinion, and that’s just fine. The lack of built-in feedback and dry/wet will put off anyone after an instant delay; it’ll delight those for whom the joy is precisely building the effect yourself. Reviving a Buchla design that sat in a drawer since 1972 is a lovely gesture, and the result promises delay textures you won’t get from a pedal. One for those who patch for the pleasure of patching, but for that crowd, the thing is irresistible.
Frequently asked questions
What is the 277t based on?
On the Model 277, a delay line Don Buchla drew in 1972 and never finished. Tiptop Audio started from the surviving original schematic to make a Eurorack version.
Does the 277t have feedback and a dry/wet control?
No, and that’s deliberate. The module has no built-in feedback loop or wet/dry mix: the user patches the feedback and blend, which makes it more demanding than a classic delay.
How is the delay time set?
By the clock speed. The signal runs through a series of clocked shift registers, and the clock setting determines the delay time, hence the character of the echo or pitch-shift.
What width and price for the 277t?
The module takes 16 HP and is announced around 299 euros as a pre-order, within the 200-series range of the Buchla and Tiptop Audio collaboration.
