AMR vs FLAC
Una comparativa detallada de AMR Audio y FLAC Audio — tamaño de archivo, calidad, compatibilidad y cuál elegir según tu flujo de trabajo.
AMR Audio
Audio FilesAMR (Adaptive Multi-Rate) is an audio format optimized for speech, used in phone calls.
Sobre los archivos AMRFLAC Audio
Audio FilesFLAC is an open-source lossless audio codec that compresses audio to roughly 50-60% of its original size without any quality loss. It is the preferred format for audiophiles and music archival.
Sobre los archivos FLACComparativa de ventajas
AMR Ventajas
- Extremely low bitrate — 4.75-12.2 kbps for speech.
- Designed for error-prone mobile channels — handles packet loss gracefully.
- Tiny file sizes — hours of voice in a few MB.
- Mandatory codec in all 3G/UMTS phones — universal cellular compatibility.
FLAC Ventajas
- Lossless — decoded audio is bit-exact identical to the source.
- 40-60% smaller than uncompressed WAV/AIFF.
- Free, patent-free, open-source reference implementation.
- Built-in error detection via MD5 checksums.
- Streaming-friendly — seek tables let you jump to any timestamp instantly.
Limitaciones
AMR Limitaciones
- Speech-only — music sounds distorted.
- Narrowband (8 kHz sample rate) — muffled compared to modern codecs.
- Patent-encumbered until recently — licensing fees slowed adoption outside telephony.
- Being phased out of new devices in favor of EVS and Opus.
- Non-standard extensions and variants make tooling inconsistent.
FLAC Limitaciones
- File sizes still large compared to lossy codecs (5-10× bigger than AAC for same audio).
- Not suitable for low-bandwidth scenarios like streaming on mobile data.
- Older MP3 players and car stereos may not decode FLAC.
- Slower to encode than lossy codecs.
Especificaciones técnicas
| Especificación | AMR | FLAC |
|---|---|---|
| MIME type | audio/amr | audio/flac |
| Extensions | .amr, .3ga | — |
| Standard | 3GPP TS 26.071 (narrowband), TS 26.171 (wideband) | Open-source reference implementation (Xiph.Org) |
| Sample rate | 8 kHz (AMR-NB); 16 kHz (AMR-WB) | — |
| Bitrates | 4.75, 5.15, 5.9, 6.7, 7.4, 7.95, 10.2, 12.2 kbps | — |
| Extension | — | .flac |
| Max bit depth | — | 32 bits per sample |
| Max sample rate | — | 655 350 Hz |
| Max channels | — | 8 |
Tamaños típicos de archivo
AMR
- 1-min voice memo 45-90 KB
- 1-hour voicemail archive 3-5 MB
FLAC
- 3-min song (CD quality) 20-30 MB
- Full album (10 tracks, CD) 250-400 MB
- 3-min song (hi-res 24-bit/96 kHz) 80-120 MB
- Live concert recording (24-bit) 2-10 GB
¿Listo para convertir?
Convierte entre AMR y FLAC online, gratis y sin instalar nada. Subida cifrada, eliminación automática a los 60 minutos.
¿Necesitas convertir gigabytes de archivos o carpetas masivas?
KaijuConverter ofrece transcodificación instantánea en memoria para el día a día. Para lotes de cientos de archivos sin esperas de subida, prueba suites profesionales de workstation.
Pago único sin renovación para convertir archivos de hasta 1 GB y lotes de 50 durante 24 horas.
Convierte vídeos, PDFs y audios pesados directamente en el navegador sin anuncios y con cola prioritaria.
Procesamiento cloud de alta velocidad para archivos de hasta 1.024 MB, retención 24h y soporte prioritario.
Procesamiento por carpetas de miles de imágenes RAW (CR3, NEF, ARW) a WebP, AVIF o TIFF.
Revelado RAW acelerado por GPU con gestión de perfiles de color ICC de 16 bits.
Preguntas frecuentes
AMR (AMR Audio) is an audio file format used to store sound recordings — music, voice, podcasts, sound effects. The format defines how the audio samples are compressed (or stored raw), what bitrates are supported, and how metadata such as title, artist, album, and cover art is embedded. It is part of the audio files family.
AMR (AMR Audio) is an audio formatoo de arquivo used to store sound recordings — music, voice, podcasts, sound effects. The formato defines how the audio samples are comprimido (or stored raw), what bitrates are suportado, e how metadata como title, artist, album, e cover art is embedded. It is part of the audio arquivos family.
VLC, foobar2000, and the default media players on Windows and macOS handle AMR natively. On mobile, iOS Music and Android media apps vary in their support — popular formats work everywhere; niche ones may need a dedicated app. If playback fails on a device, converting to MP3 or AAC usually solves it.
VLC, foobar2000, e the default media players no Windows e macOS handle AMR natively. On mobile, iOS Music e Android media apps vary in their support — popular formatoos funcionar everywhere; niche ones may need a dedicated app. If playback fails em um device, convertendo to MP3 ou AAC Geralmente solves it.
Upload the AMR to KaijuConverter and pick MP3, WAV, FLAC, AAC, OGG, or any other target. Our FFmpeg pipeline decodes the audio and re-encodes to the target format at sensible default bitrates (VBR ~190 kbps for music, 96 kbps for speech). Metadata and cover art travel with the audio where both formats support them.
AMR can be lossy or lossless depending on the specific variant. Lossy variants (smaller files) discard some audio detail during compression in ways tuned to be inaudible; lossless variants preserve every sample exactly but produce larger files. For distribution, lossy at high bitrate is standard; for archival, lossless wins.