AMR-WB · .awb · 10 h per file

Transcribe a long AMR-WB (.awb) file wideband voice, start to finish.

A two-and-a-half-hour AWB recording is 150 minutes: it transcribes in about 5 minutes and fits the $6 pack (500 minutes), with the first 20 minutes free. AMR-WB is wideband phone voice at roughly 5.7 to 10.7 MB an hour, so size is never the problem; if the upload refuses the .awb, convert it to MP3 first.

Packs from $6, credits never expire · then from $0.36/hour · Credits never expire · Never used to train AI

✓10 hours per file · ✓About 5 minutes for 2.5 hours · ✓The first 20 minutes free · ✓Not used for training

AMR-WB in brief

Wideband voice was made for HD calls. On a phone it also became the format for long recordings.

Where .awb files come from

AMR-WB, saved as .awb or inside a 3GP container, is the wideband version of the codec mobile networks use for voice. Some phone call recorders, voice-memo apps and field recorders save in it, so an interview or a meeting recorded on a phone can arrive as a long .awb file.

Size by bitrate

AMR-WB samples at 16 kHz and runs between 6.6 and 23.85 kbps. At the common 12.65 kbps an hour is about 5.7 MB; at the top rate about 10.7 MB. Ten hours never passes roughly 110 MB, so the 10-hour line per file is the only limit you will meet.

Uploading or converting

Try the file on the upload page. If the upload refuses it, convert to MP3 or MP4 with ffmpeg or VLC; ffmpeg -i interview.awb interview.mp3 works in most builds. A 3GP file with AMR-WB inside behaves the same way.

Clearer than narrowband

Wideband keeps the upper voice frequencies that phone-quality AMR cuts off, so consonants and names come through better in the transcript. It is still a voice codec: music and background sound are not transcribed, the speech is.

Phone recordings, the slow route

An interview recorded on a phone is easy to capture and hard to use.

✗ Stuck on the handset

Sharing apps compress again, and many desktop tools do not know the extension.

An .awb file the laptop cannot play
Messaging apps that cap file length
Interviews re-recorded off a speaker
Hours replayed to find one answer
Quotes typed out by hand
A project spread over dozens of memos

✓ One upload per recording

Send the file or a quick MP3 of it; the transcript comes back whole.

Two and a half hours in about 5 minutes
Chapters by topic
Quotes pulled out with timestamps
Names and dates listed
A chat to find what was said
Minutes kept across the project

Sample

An oral history interview recorded on a phone.

An illustrative example written for this page; not a real interview. Timestamps show positions in a long AWB file.

transcript · whipscribe.com/view/transcribe-long-awb-file

00:01:05 We are recording now. Tell me where you were living when the factory first opened.

00:48:33 On the hill above the river. You could hear the shift whistle from our kitchen.

01:37:20 And the year it closed, do you remember who told you first?

02:22:58 My neighbour, at the bus stop. Nobody believed it until the gates were locked.

Export

One transcript. Five clean formats.

Every pack exports all five — no format is held back for a higher tier.

.txt

Plain text

De-ummed paragraphs. Ready to paste.

.srt

SRT captions

Timed to the speech. Every video editor reads this.

.vtt

WebVTT

HTML5 player + YouTube uploads.

.docx

Show notes

Formatted with chapters and pull-quotes.

.json

Machine-readable

Timestamped text for your own tools.

Pricing

Honest pricing, no surprises.

A pack from $6 (500 minutes) opens the full transcript. After that, no subscription and no auto-renew — every tier is a one-time minute pack, and credits never expire. Buy once, use the minutes whenever you need them.

Casual pack

$6/500 min

8 hours of audio — $0.72 an hour. One-time — credits never expire.

500 minutes of audio
All export formats
AI chat over the whole transcript
Executive summary & key quote

Get 500 minutes

Best value

$12/2,000 min

33 hours of audio — $0.36 an hour. Credits never expire.

2,000 minutes of audio
Summary, chapters and key quotes
All export formats
AI chat over the whole transcript

Get 2,000 minutes

Bulk pack

$24/5,000 min

83 hours of audio — $0.29 an hour. Credits never expire.

5,000 minutes of audio
Summary, chapters and key quotes
API access for batch pipelines
All export formats

Get 5,000 minutes

FAQ

Long AWB recordings: the usual questions

Will the upload accept an .awb file?

Often it will, since AMR-WB is a common voice codec. If the upload refuses it, convert to MP3 or MP4 with ffmpeg or VLC and upload that; the words come out the same.

How long does it take?

About 2 minutes per audio hour: a 2.5-hour interview is ready in about 5 minutes, and a 10-hour file in about 20.

What does a research project cost?

Twenty interviews of 90 minutes each are 30 hours, or 1,800 minutes, which the $12 pack (2,000 minutes) covers with 200 left. A single long interview of 2.5 hours is 150 minutes on the $6 pack.

Are the speakers kept apart?

Speakers are identified and named in the summary, key quotes and chapters, which is where an interviewer and a narrator usually need to be told apart.

What about phone calls?

A call recorded as AMR-WB transcribes like any other file. Recording a call needs the consent the law where you are requires; no bot joins a live call, this works on the recording afterwards.

Which languages and exports, and is the audio private?

99 languages are detected automatically, and a recording that switches language is handled on its main language. Exports are TXT, DOCX, SRT, VTT and JSON. Recordings are transcribed on our own servers and are never used for training.

An interview in .awb. Readable in minutes.

Upload the AWB file

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