Convert AMR to M4A
Convert AMR files to M4A format online for free. No upload required, 100% private.
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AMRM4ARe-encoding
Converting between two lossy formats (AMR → M4A) involves re-encoding, which may cause additional quality loss. For best results, convert from the original source file when possible.
About AMR
AMR
Adaptive Multi-Rate Audio Codec
AMR is a speech audio codec optimized for voice recording. It is commonly used in mobile phones for voice memos and MMS messages.
Extension
.amr
Developed By
ETSI
Released
1999
Compression
LossyTypical Use Cases
Voice recordingMobile phone audioMMS messagesVoIP
Pros
- • Very small file size
- • Optimized for speech
- • Mobile device support
Cons
- • Poor music quality
- • Speech only
- • Limited compatibility
About M4A
M4A
MPEG-4 Part 14 Audio
M4A is an audio-only MPEG-4 container format, commonly used by Apple devices and iTunes. It typically contains AAC or ALAC encoded audio.
Extension
.m4a
Developed By
Apple Inc.
Released
2001
Compression
LossyTypical Use Cases
iTunes musicApple devicesAudiobooksPodcasts
Pros
- • Better quality than MP3 at same bitrate
- • Good Apple ecosystem support
- • Supports chapters
Cons
- • Less universal than MP3
- • Some older devices incompatible
- • Requires specific codecs