AAC file

AAC audio file to quotes with timestamps in English

AAC audio file to quotes with timestamps in English: send the file and get the text with the timecodes. One file may be up to 30 minutes on the free plan, no minute limit on Pro.

3 files a day up to 30 minutes, free99+ languagesSpeaker separation and timestamps
In short

What the AAC stores is what the engine needs. The English speech becomes the list of quotations in the sections Who spoke, Quotes with timestamps, Themes; one file may be up to 30 minutes, and 3 files a day are free.

How it works

How to get the file and turn it into quotes with timestamps

  1. 1

    Send it as an audio file

    For an audio file the Telegram Bot API asks for the .MP3 or .M4A format

  2. 2

    Upload the file

    The widget takes the file of the AAC audio file as it is and marks the speech as English, so the engine does not have to guess what it is about.

  3. 3

    Turn the text into the list of quotations

    The instruction of the task asks for the list of quotations and puts the answer about the AAC audio file into the sections Who spoke, Quotes with timestamps, Themes; a claim that is not in the recording is not written.

  4. 4

    Mark the language of the speech

    The recording of the AAC audio file is in English, and that is one of the 99+ languages the engine reads; the setting of the widget says English and the list of quotations follows.

  5. 5

    Check the file before the upload

    In the FAQ of the FFmpeg library the M4A is written next to the codec it carries: M4A (AAC), AC3 and WMA

The result

What comes back from the engine

  • TXT

    One segment per line, the way a person wrote it down. It is the format to paste into a ticket, a chat or a document.

  • TXT, CSV

    The start and the end time of every segment, and the speakers named separately when you ask for it.

  • SRT, VTT

    SRT and VTT with the time of every line, so the recording can carry its own subtitles.

  • Markdown, DOCX

    The transcript is edited through the API and exported as Markdown for a wiki, or as DOCX for a review.

The facts

What AAC keeps, and what it says about it

Where the file is

The FFmpeg library of Audacity imports M4A (AAC), AC3 and WMA, a much larger range of audio formats than the program reads on its own.

What the file is

The VLC player reads AAC among the audio formats it plays: AAC is MPEG-4 part3 and stands next to MP3 in the list.

What can go wrong

The Telegram Bot API takes an audio file in the .MP3 or .M4A format, and the M4A carries the AAC codec.

What the platform says

In the table of the codecs and the containers of OBS Studio the AAC row names the MP4, MOV, MKV and TS containers.

What the platform says

In the FAQ of the FFmpeg library the M4A is written next to the codec it carries: M4A (AAC), AC3 and WMA.

Length of one file

up to 30 minutes on the free plan, no minute limit on Pro

Free plan

$0: 3 files a day, up to 30 minutes per file, no card

Pro plan

$10 a month when you pay yearly ($120 a year), or $20 a month

The case

What the recording does not give you

The Telegram Bot API takes an audio file in the .MP3 or .M4A format, and the M4A carries the AAC codec. The English speech of the AAC audio file is read first, and the list of quotations is what the editor of the interview gets out of the transcript.

Tips

  • The instruction of the list of quotations is already written.

  • A recording of the AAC audio file in English is read as English.

  • A file over 30 minutes has to be cut into parts; the Pro plan takes a recording of any length.

  • Because of software patents Audacity cannot include the FFmpeg software: the free FFmpeg library of a third party is installed separately.

  • Bots can currently send audio files of up to 50 MB in size, and the limit may be changed in the future.

FAQ

Questions about AAC audio file and quotes with timestamps

What does the AAC keep for the AAC audio file?

The Telegram Bot API takes an audio file in the .MP3 or .M4A format, and the M4A carries the AAC codec. The file of the AAC audio file is the input of the engine, and the list of quotations is written from it.

Which problems can come with the AAC audio file?

Because of software patents Audacity cannot include the FFmpeg software: the free FFmpeg library of a third party is installed separately. The engine does not change the file of the AAC audio file; it reads it as it is and writes the list of quotations.

What comes back after the English AAC audio file is read?

the list of quotations in the sections Who spoke, Quotes with timestamps, Themes, with the time of every line of the recording of the AAC audio file.

How long may the file be, and how much is free?

One file may be up to 30 minutes on the free plan, and the free plan gives 3 files a day for the list of quotations.

Where does the file of the AAC audio file wait?

On the AAC. The facts of the table above name the place where the file of the AAC audio file is kept and the way it comes off.

Related pages

Sources

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  3. C
    Telegram Bot API (read 2026-10-25)core.telegram.org · checked
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Reading: 4 minutesUpdated Transcribsi editorial team

Drop a recording — the text arrives in a minute

Speakers by name, a time on every line, export to TXT, SRT, VTT, CSV and Markdown.

3 files a day up to 30 minutes, free99+ languagesSpeaker separation and timestamps