Somewhere between nostalgia and stubbornness sits the compact cassette, and a developer named Andrey Romanov has built a tool to bottle its sound. Audio-Cassette-Simulation is a set of scripts that run through ffmpeg and dress your files in the character of a specific tape, hiss, wobble and all.
There is nothing mystical about it. The work lives in the filter chains, and the payoff is that each profile answers to a real cassette rather than a generic lo-fi preset. BASF LH Extra C90 gives you moderate hiss and mild flutter. Maxell UD C90 runs cleaner with a wider range. The 1978 Sony CHF tapes bring warm mids and a touch of speed drift. TDK’s D90 keeps things tidy with only a hint of analogue colour. Then there is the Soviet MK-60, heavy on hiss, wow and flutter, and unapologetically brutal with the top end.
Feed it an mp3, ogg, m4a or aac, or point it at a live stream, and it records into segments. Output lands as mp3, which will make the audiophile crowd wince. That rather misses the point. If you are chasing the sound of a C90 left in a car door pocket through an Adelaide summer, bit-perfect fidelity was never the ambition.
The appeal is honesty. Wow and flutter, the small speed fluctuations that gave tape its living quality, are here by design rather than accident. It is the imperfection people actually miss, recreated on purpose.
You can find out more here
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