Tapedeck – A 4-track cassette recorder in your terminal, built in Rust

Name: Tapedeck – A 4-track cassette recorder in your terminal, built in Rust
Availability: InStock
Author: EmTekker

by EmTekker·Feb 21, 2026·2 points·1 comment

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AI Analysis

●●●BangerWizardryCozyRabbit Hole

OP-1 in your terminal with lock-free threads and bandlimited synths. Actually ships.

Strengths

•Lock-free crossbeam channel architecture between UI, control, and audio threads proves real-time audio in terminal is viable
•Five synth engines (FM, Karplus-Strong, filtered noise) + tape simulation (wow, flutter, saturation) suggest deep audio design knowledge, not just wrapper
•Constraint-based cassette metaphor (4 tracks, forward-only tape, commit to takes) naturally limits scope while enabling creative focus

Weaknesses

•Niche audience: terminal musicians are rare; DAWs (Ableton, Logic, Reaper) already serve casual sketch workflows
•No indication of multi-platform stability; macOS + Linux binary releases suggest fragile audio driver surface

Post Description

Hey HN, I built a terminal-based 4-track cassette recorder inspired by the Teenage Engineering OP-1. You can record from your mic, layer synthesizers, program drum beats, and mix everything down all without leaving the terminal.

Architecture is three threads communicating via lock-free crossbeam channels: a 60fps ratatui UI thread, a control thread for app state, and a cpal audio callback at 44.1kHz. Everything is real-time!

I wanted something where I could sketch musical ideas quickly without opening a DAW. The cassette metaphor keeps things constrained in a fun way; 4 tracks, tape moves forward, commit to your takes.

Install: cargo install --git https://github.com/manthan787/tapedeck (Rust 1.70+), or grab a binary from the releases page. https://github.com/manthan787/tapedeck

Would love feedback! Especially on the audio engine and synth design. Happy to answer any questions!