Cut AMR

How to Cut AMR Audio Online

1. Upload Your AMR File: Drag and drop or click "Add Files" to select an .amr recording — an Android voice memo, a saved voicemail export, an old feature-phone ringtone backup, an MMS voice message extracted from a .3gp, or a call-recorder capture (ACR, Cube, Boldbeast). Both AMR-NB (8 kHz narrowband) and AMR-WB (16 kHz wideband, sometimes .awb) files are accepted. Batch is supported — drop several recordings and apply the same cut range to each.
2. Set Start Time and Duration: Enter a start time and a duration to keep. Both fields accept seconds (12.5) or HH:MM:SS.sss format (00:00:08.250) for millisecond precision. Add multiple cut ranges to pull several clips out of one recording in a single pass — each pair produces its own output file.
3. Pick Output Codec and Bitrate (Optional): Default keeps AMR with the source narrowband or wideband mode. Switch the codec to AMR-NB (4.75 / 5.15 / 5.90 / 6.70 / 7.40 / 7.95 / 10.2 / 12.2 kbps), AMR-WB (6.60 / 8.85 / 12.65 / 14.25 / 15.85 / 18.25 / 19.85 / 23.05 / 23.85 kbps), or step up to MP3, AAC, Opus, FLAC, WAV (PCM), Vorbis, or WMA. Pick a quality preset (Highest → Lowest), set sample rate (8000 / 12000 / 16000 / 24000 / 44100 / 48000 Hz), or switch between Mono and Stereo when you change codec.
4. Cut and Download: Click Cut. Files process in your browser session — download individually or as a ZIP. No sign-up, no watermark, no length cap on the output.

Why Cut AMR Files?

AMR (Adaptive Multi-Rate) is a 3GPP-standard speech codec built for the GSM and UMTS phone networks — the audio of 2G/3G calls, MMS voice messages, and the original Android voice-memo format before Google migrated to AAC-in-3GP and then AAC-in-M4A. AMR-NB targets 8 kHz mono speech at 4.75-12.2 kbps; AMR-WB (also published as G.722.2, sometimes carrying the .awb extension) targets 16 kHz mono speech at 6.60-23.85 kbps. AMR is small — a one-minute AMR-NB clip is roughly 60-90 KB — and tuned for human voice rather than music. Common reasons to cut AMR:

• Voicemail excerpting — Carrier voicemail exports and Google Voice MP3-or-AMR downloads still ship as AMR on plenty of plans. Cut out the carrier prompt, the dial tone, and the silent hang-up tail to keep just the substantive part for forwarding to a lawyer, partner, or family member.
• AMR ringtones for older Androids and feature phones — Pre-2012 Androids (Gingerbread, Ice Cream Sandwich) and Symbian / Series 40 / Java ME feature phones load .amr ringtones natively because the format is part of the 3GPP ringtone spec. Cut a 10-30 second hook out of a longer recording and copy it into the phone's ringtone folder.
• Voice-note cleanup — Reporters' pocket recorders, dictation apps, and stock Android voice memos save quick notes as AMR to keep storage minimal. Cut the "checking, checking" head and the "okay, end" tail before transcribing or filing.
• MMS voice extraction — Voice MMS messages on older Android and feature phones land as AMR clips inside a .3gp container. Cut the speech segment out for transcription or forward as a standalone .amr file.
• Call-recording highlights — Android call-recorder apps (ACR, Cube, Boldbeast) still default to AMR for storage reasons. Cut a 45-minute call down to the 90-second exchange that matters before sharing or archiving.
• Sharing under chat caps — WhatsApp caps voice notes around 16 MB, Discord at 10 MB (25 MB Nitro), and SMS-based MMS at 300 KB - 1 MB depending on carrier. AMR is already tiny, but cutting a long capture to the relevant slice means it sails through any of those limits.

For a different output after cutting, see AMR to MP3, AMR to WAV, or Trim AMR for the same operation framed as a duration-based trim.

AMR-NB vs AMR-WB vs MP3 — Format Comparison

Property	AMR-NB	AMR-WB	MP3
Sample rate	8 kHz	16 kHz	8-48 kHz
Bitrate range	4.75-12.2 kbps	6.60-23.85 kbps	32-320 kbps
Channels	Mono only	Mono only	Mono or Stereo
Tuned for	Narrowband telephone speech	Wideband / HD-voice speech	Music + speech
File ext	.amr	.awb (or .amr)	.mp3
1-minute size	~60-90 KB	~80-180 KB	~240-2400 KB
Universal playback	Limited (Android, VLC, ffmpeg)	Limited (VLC, ffmpeg)	Yes (every device)
Best for	2G call recordings, legacy ringtones	HD-voice / VoLTE captures	Sharing and music

AMR's strength is byte-for-byte the smallest meaningful speech file you can ship; its weakness is that iOS, macOS Finder Quick Look, Windows Media Player, and most browsers don't play it natively. Re-encode to MP3 or WAV in step 3 only when the recipient can't open .amr.

AMR Ringtone and Bitrate Quick Guide

Bitrate mode	Use case	Notes
AMR-NB 4.75 kbps	Lowest-bandwidth voicemail, archival of 2G calls	Audibly compressed but intelligible
AMR-NB 7.40 kbps	Default for many Android voice recorders	Good clarity / size tradeoff for narrowband speech
AMR-NB 12.2 kbps	Highest AMR-NB quality (also called GSM-EFR)	Top of AMR-NB; common for legacy ringtones
AMR-WB 12.65 kbps	Common HD-voice / VoLTE call mode	Wideband speech, noticeably more natural than NB
AMR-WB 23.85 kbps	Highest AMR-WB quality	Best AMR option before stepping out to Opus or AAC
MP3 64 kbps mono	Re-encode for universal playback	Smallest MP3 still clean for speech
MP3 128 kbps mono	Re-encode for shareable voice clips	Drop to mono since AMR is mono-only

If the cut audio must stay in the AMR ecosystem (legacy ringtone slot, original carrier-recording bitrate), keep AMR. If anyone on iOS, Windows, or a desktop browser needs to play it, re-encode to MP3 mono in step 3.

Frequently Asked Questions

Will cutting reduce my AMR's audio quality?

AMR is a frame-based speech codec, so XConvert decodes and re-encodes the kept segment with the same AMR-NB or AMR-WB mode the source used. The output stays at the source bitrate by default — quality only changes if you opt into a different bitrate or codec in step 3. Pick the highest mode the source actually uses (12.2 kbps AMR-NB or 23.85 kbps AMR-WB) and the loss versus the original frames is negligible for speech.

What's the difference between AMR-NB and AMR-WB, and how do I tell which one I have?

AMR-NB is the original narrowband codec — 8 kHz sample rate, 4.75-12.2 kbps, the audio of 2G GSM calls and the early Android voice-memo format. AMR-WB (published as G.722.2) is wideband — 16 kHz, 6.60-23.85 kbps, the codec behind 3G/VoLTE "HD Voice." Files use .amr for narrowband and .awb for wideband, but Android often writes both as .amr. XConvert detects the mode automatically; if you re-encode in step 3 you can keep it the same or switch.

Can I cut an AMR ringtone for a feature phone or older Android?

Yes — that's one of the original reasons AMR ringtones exist. Feature phones (Series 40, Symbian, Java ME) and pre-Jelly-Bean Androids load .amr ringtones from the phone's ringtone folder directly because AMR is part of the 3GPP ringtone spec. Cut a 10-30 second hook with start time and duration in step 2, keep the codec on AMR in step 3, and copy the resulting .amr to the device. Modern iPhones use .m4r instead — see AMR to M4A for that route.

How precise is the cut on an AMR — can I land on the exact millisecond I want?

AMR frames are 20 ms each (160 samples at 8 kHz for NB, 320 samples at 16 kHz for WB). XConvert decodes and re-encodes around your start and duration values, so the output is sample-accurate within the codec — typically within a single 20 ms frame of the timestamp you entered. For voicemail, court excerpts, and ringtone hooks that's tighter than the human ear can detect.

Why is my AMR mono only — can I make it stereo?

AMR-NB and AMR-WB are mono-only codecs by spec; the format has no stereo mode. The mic on the phone that captured it was almost certainly mono too. If you need stereo output for a NLE timeline or a stereo ringtone, switch the codec in step 3 to MP3, AAC, FLAC, Opus, or WAV — those let you choose Mono or Stereo (the second channel will be a duplicate of the mono source unless you mix in something else).

Can I cut several clips from one long AMR recording in a single pass?

Yes. Add multiple cut ranges — each pair of start time + duration produces a separate output file. Useful for pulling three relevant exchanges out of a 45-minute call recording, splitting an all-day push-to-talk session into individual transmissions, or carving a multi-message voicemail dump into one file per caller.

What's the maximum AMR file size or length I can cut?

There's no fixed cap. Cutting runs in your browser, so the practical limit is your device's available memory. AMR is so compact that even a 12-hour call-recorder log is usually under 60 MB at AMR-NB 7.4 kbps, and a full-day field-recorder roll fits comfortably. Multi-hour AMR files cut in seconds once uploaded.

Should I cut first or convert AMR to MP3 first?

Cut first. AMR is already tiny, so cutting first keeps the working set small and means the optional MP3 re-encode in step 3 (or via AMR to MP3 afterward) only has to process the seconds you kept, not the whole recording.

Will the cut AMR play in iPhone, my car stereo, or a Bluetooth speaker?

Native playback outside of Android is patchy. iOS doesn't open .amr from Files or Mail without a third-party app, macOS Finder Quick Look refuses it, and most car head units and Bluetooth speakers want MP3, AAC, or WAV. VLC plays AMR everywhere, and ffmpeg / mpv handle it from the command line. For frictionless playback in the car or on iPhone, cut first, then re-encode to MP3 in step 3 or use AMR to WAV.