Substack

Substack audio post to a blog post in English

Substack audio post to a blog post 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

One Substack audio post is enough for the blog post. The engine reads it in English and writes the sections Headline and lead, Outline, Draft, and every line of the answer comes from the recording. The free plan gives 3 files a day.

How it works

How to get the file and turn it into a blog post

  1. 1

    Record or upload the file

    The audio is recorded or uploaded as an MP3, a WAV or an ACC file, and the processing of the file is waited for

  2. 2

    Give the file to the service

    The file of the Substack audio post is sent as an attachment; the language of the speech is English, and the blog post comes back in the export of the service.

  3. 3

    Run the instruction of the blog post

    The instruction that is set for this task goes through the transcript of the Substack audio post and writes the blog post in the sections Headline and lead, Outline, Draft; nothing is added that was not said.

  4. 4

    Tell the engine what it hears

    The engine reads 99+ languages; this Substack audio post is in English, so the language of the widget is set to English for the blog post.

  5. 5

    Check the file before the upload

    The audio file of a post is an MP3, a WAV or an ACC file

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 Substack keeps, and what it says about it

Where Substack keeps the file, and what it says about it
WhatWhat the platform says
Where the file isAn audio post is made in the web version of the publication: Create and then Podcast.
What the file isThe audio file is recorded in the app or uploaded, and the transcript is opened with the transcript icon when the file has been processed.
What can go wrongA video post is recorded in the browser with the Recording Studio of Substack or uploaded with Select file.
What the platform saysThe audio file of a post is an MP3, a WAV or an ACC file.
What the platform saysThe transcript of a post can be edited, and a transcript file of the author can be uploaded as a .txt, .srt or .vtt file.
Length of one fileup 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 audio file is recorded in the app or uploaded, and the transcript is opened with the transcript icon when the file has been processed. That is the part that depends on the Substack; everything after it is the work of the blog post, and it is the same for every recording.

Tips

  • The instruction of the blog post is already written.

  • Mark the language of the speech of the Substack audio post.

  • The file of the Substack audio post stays on your own disk.

  • The recommended maximum size of a video upload is 20 GB, with a H.264 codec and an AAC audio codec.

FAQ

Questions about Substack audio post and a blog post

What does the Substack keep for the Substack audio post?

An audio post is made in the web version of the publication: Create and then Podcast. The file of the Substack audio post is the input of the engine, and the blog post is written from it.

What does the Substack say about the Substack audio post?

The recommended maximum size of a video upload is 20 GB, with a H.264 codec and an AAC audio codec. The engine reads the English speech of the Substack audio post and writes the blog post from that text.

How is the blog post built from the Substack audio post?

The engine reads the English speech and the instruction writes the blog post in the sections Headline and lead, Outline, Draft; every line comes from the transcript of the Substack audio post.

Is there a limit to the length of the Substack audio post?

One file of the Substack audio post may be up to 30 minutes on the free plan; the free plan gives 3 files a day.

Is a link enough for the Substack audio post?

Bring the file of the Substack audio post to your own disk and upload it here; the engine returns the blog post with the time of every line.

Related pages

Sources

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    Pricing page (read 2026-10-25)transcrib.si · checked

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