Where do aac files come from?
Aac is the successor to mp3 and appears in many camera recordings, phone audio and streams. Sometimes as a standalone .aac file, often as the audio track of a video. Murmel reads both: upload the file as you have it and the transcript is ready within minutes.
How it works
- Upload your file. Drop your aac file into the Studio; conversion is never needed.
- Murmel transcribes. The text is ready within minutes, with speaker labels if you want them.
- Correct and export. Replay the audio next to the text, adjust where needed and export to Word, text or subtitles.
Dutch model, Dutch servers
Murmel runs on a model trained specifically for Dutch speech that makes fewer errors than open-source alternatives such as Whisper in a public benchmark. Processing happens on servers in the Netherlands, your file is automatically deleted after 7 days and is not used for AI training unless you explicitly opt in.
What does it cost?
Prepaid credits cost €1 per 50 minutes of audio (excl. VAT), available from €5 and valid for 6 months: a one-off file costs cents, no subscription. Transcribing regularly? Try 14 days for €0.01 first, then from €9 per month (excl. VAT), cancel monthly.
Frequently asked questions
My camera produces video with aac audio, what do I upload?
Just the video file. Murmel extracts the audio track itself; no need to separate or convert anything.
Is there a quality difference with mp3?
Aac compresses slightly more efficiently than mp3 at the same bitrate. In practice it makes little difference for transcription; both work fine.
What does converting a aac file to text cost?
With prepaid credits you pay €1 per 50 minutes of audio (excl. VAT), available from €5 and valid for 6 months. Or try 14 days for €0.01 and then from €9 per month (excl. VAT), cancel monthly.
Where is my file processed?
On servers in the Netherlands. Your file never leaves the EU, is automatically deleted after 7 days and is not used for AI training unless you explicitly opt in.