# MP3 to AMR Converter Convert MP3 audio files to AMR (Adaptive Multi-Rate) format > Canonical page: https://elysiatools.com/en/tools/mp3-to-amr - **Category:** Media - **Keywords:** mp3, amr, audio, converter, voice, speech, mobile, transcode ## Overview The MP3 to AMR Converter allows you to easily convert MP3 audio files into the highly compressed AMR (Adaptive Multi-Rate) format, which is optimized for speech and voice recordings. By adjusting the AMR bitrate mode and preserving metadata, you can generate compact audio files perfect for legacy mobile devices, voice messaging systems, and efficient storage. ## Inputs - **Audio File** (file): Upload an MP3 file to convert to AMR - **AMR Bitrate Mode** (select): AMR supports various bitrates optimized for different speech quality levels. - **Audio Channels** (select): AMR is mono-only for speech applications. - **Keep Metadata (when available)** (checkbox): Preserve title/artist tags when possible ## When to use - When you need to compress voice recordings or speech audio to save storage space on mobile devices. - When preparing audio files for legacy mobile networks or telecommunication systems that exclusively support the AMR format. - When optimizing voice-based audio files for low-bandwidth streaming or messaging applications. ## How it works - Upload your source MP3 audio file (up to 20MB) using the file selector. - Select your preferred AMR bitrate mode, ranging from 4.75 kbps for maximum compression to 12.2 kbps for the best speech quality. - Choose whether to preserve the original audio metadata and click convert to generate the mono AMR file. ## Use cases - Converting MP3 voice memos to AMR to save storage space on older mobile handsets. - Preparing speech audio clips for integration into telecom IVR (Interactive Voice Response) systems. - Compressing podcast drafts or spoken-word audio for low-bandwidth distribution. ## Frequently asked questions ### What is the maximum file size supported for conversion? You can upload MP3 files up to 20 MB in size. ### Why does the converter only output mono audio? The AMR format is specifically designed for speech and voice applications, which natively use a single (mono) audio channel. ### Which AMR bitrate should I choose? We recommend 12.2 kbps for the best speech quality, but you can choose lower bitrates down to 4.75 kbps if you need extreme compression. ### Will my MP3 metadata be preserved? Yes, if you check the 'Keep Metadata' option, the converter will attempt to preserve tags like title and artist. ### Is AMR suitable for music files? No, AMR is highly optimized for human speech and will significantly degrade the quality of music or complex background audio. ## Related tools - [AMR to MP3 Converter](https://elysiatools.com/en/tools/amr-to-mp3): Convert AMR (Adaptive Multi-Rate) audio files to MP3 format - [Batch Audio Converter](https://elysiatools.com/en/tools/audio-batch-converter): Convert multiple audio files between different formats like MP3, WAV, FLAC, AAC, OGG, Opus with quality settings and batch processing - [Audio Codec Swap](https://elysiatools.com/en/tools/audio-codec-swap): Change the codec of an audio file within a chosen output format - [Audio Format Converter](https://elysiatools.com/en/tools/audio-converter): Convert audio files between different formats like MP3, WAV, FLAC, AAC, OGG with quality settings and volume adjustment - [GSM to MP3 Converter](https://elysiatools.com/en/tools/gsm-to-mp3): Convert GSM audio files to MP3 format - [MP3 to GSM Converter](https://elysiatools.com/en/tools/mp3-to-gsm): Convert MP3 audio files to GSM format - [Video Audio Extract Enhanced](https://elysiatools.com/en/tools/video-audio-extract-enhanced): Extract audio from video files with advanced options - multiple formats, quality settings, and audio enhancement - [AAC to MP3 Converter](https://elysiatools.com/en/tools/aac-to-mp3): Convert AAC audio to MP3 with controllable bitrate, resampling, and channel selection ## Samples - [Copyright-Free MP3 Audio Samples](https://elysiatools.com/en/samples/mp3-samples): Collection of royalty-free audio samples for testing and development purposes including nature sounds, meditation music, and ambient audio - [Copyright-Free FLAC Audio Samples](https://elysiatools.com/en/samples/flac-samples): Lossless FLAC audio samples for testing and development, mirrored from MP3 set with nature sounds and meditation music - [Copyright-Free WAV Audio Samples](https://elysiatools.com/en/samples/wav-samples): Uncompressed PCM WAV audio samples for testing and development, mirrored from MP3 set with nature sounds and meditation music - [AMR Narrowband Audio Sample](https://elysiatools.com/en/samples/amr-samples): AMR-NB voice audio sample for telephony playback, upload, and format conversion workflows ## Related content - [Voice Codec, PCM, and Legacy Audio Compatibility Workflows](https://elysiatools.com/en/hubs/voice-codec-pcm-compatibility): Diagnose codec and sample-format mismatches, convert AMR and GSM voice files, bridge PCM and WAV, and prepare legacy DTS or DSD assets for delivery. - [Audio Encoding and Format Conversion Tools](https://elysiatools.com/en/hubs/audio-convert): Compare audio format conversion, bitrate changes, sample-rate conversion, codec swaps, and export tools in one hub for delivery and archive workflows. - [Audio Editing and Cleanup Tools](https://elysiatools.com/en/hubs/audio-utility): Compare audio trimming, silence removal, fades, mixing, and denoise tools in one hub for podcast, voiceover, and music cleanup workflows. - [Audio Preview, Tone, and Effect Generator Tools](https://elysiatools.com/en/hubs/audio-generate): Compare audio preview generation, silence creation, ringtone building, fingerprinting, loudness reports, and effect-style audio generators in one hub.