One-bit Delay is an effect plugin (VST/AU/Standalone) that provides an exceedingly accurate digital emulation of delta-sigma modulation delay lines — a technique from the early 90s when 1-bit memory was dirt cheap and engineers found ways to exploit it for audio delay (like the infamous PT2399).
The result is a delay with a character unlike anything else: harsh quantization noise at one end that softens into warm, ghostly repeats as the signal decays through the feedback loop. From gurgly burps to sonorous feedback swells, the One-Bit Delay becomes a sonic landscape to explore.
Unlike clean digital delays or warm analog emulations, one-bit delay sits in its own uncanny valley — digital at its core, but with an organic, almost biological degradation pattern that makes each echo feel alive.
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Downloads
macOS Intel 11-13
Legacy Intel build for macOS 11-13
Coming soon
macOS Intel 14+
For macOS 14+ on Intel
Coming soon
macOS Silicon
2020 and later
Coming soon
Windows 10
Legacy build for older systems
Coming soon
Windows 11
Recommended for modern PCs
Coming soon
Linux
VST3 and Standalone
Coming soon
One-bit Delay vs Real Hardware
One-bit Delay models the PT2399 delay chip at the circuit level, capturing the exact delay timing curve across the full range of delay-time resistor values.
THD characteristics match hardware measurements — including the way distortion increases at shorter delay times and higher feedback settings, giving the plugin the same gritty, saturated character as the real chip.
The frequency response rolls off naturally above the audible range, just like the analog reconstruction filter in the PT2399, producing the warm, dark repeats that define the sound.
Changelog
v0.1.0 — March 1, 2026
- New Initial release