SMF·KRISP
Can a prompt replace Krisp?
Audio & video editing — noise cancellation
Exhibit tracking slip
Verdict
Cleaning up a recorded audio file after the fact — suppress background noise, normalize levels — is a real one-sitting build on open-source audio tools, running fully offline. What it cannot do is Krisp's actual product: real-time, low-latency noise suppression running as a virtual microphone during a live call, which needs OS-level audio driver work, not a script.
Exhibit A — The prompt
Received on30.07.2026Build a noise-cleanup tool for recordings, not live calls — say so plainly up front, since that's the real scope boundary here. A command that takes an audio file, runs it through an open-source noise-suppression filter (RNNoise is a solid, well-tested choice), then normalizes loudness so voice levels come out consistent, and writes the cleaned result alongside the original without touching the source file. Add a watch-folder mode: files dropped into an input folder get a cleaned version written to an output folder automatically. Support batch-processing a whole folder at once, printing a rough before/after noise estimate per file.
Do not attempt live-call processing or a virtual audio device — that needs an OS-level audio driver and millisecond latency, which is genuinely Krisp's product, not a missing feature to bolt onto a file-cleanup script. Point to the operating system's own built-in voice isolation as the honest alternative for live calls in the README.Opening prefills the prompt — press enter to run it.
Exhibit B — What you lose
- B.1 real-time suppression as a virtual microphone usable in any call app
- B.2 the low latency that makes it invisible during a live conversation
- B.3 meeting-app integrations
- B.4 admin controls for a team
Prior art
Exhibit C — Why people still pay: hardware/OS integration
Audio cleanup during a live call has to be instant and invisible — people pay for a real-time virtual microphone, which is genuinely different, harder engineering than cleaning up a file afterward.
Questions
Can I bring over recordings I cleaned with Krisp?
The cleaned audio files themselves, yes — they're just files. There's nothing to migrate structurally, since Krisp doesn't have a project format beyond the audio it processes.
Will it work on my phone?
No — this is a command-line tool meant to run on a computer with real processing power, and it's scoped to recordings, not live calls, which is where mobile use would matter most anyway.
What does it cost to run?
Nothing — it runs fully offline on your own machine, no API key and no hosting required.
What's the one thing that doesn't survive the rebuild?
Live noise suppression. Krisp's actual product cleans your microphone in real time during a call, invisible to the other side; this tool only ever cleans a file after the fact, which is a fundamentally different, easier problem.
Related tools
Receipt