Convert MP1 to AMR — Free Online Converter

Converting MP1 to AMR re-encodes audio from the first MPEG audio standard into the Adaptive Multi-Rate speech codec used in GSM telephony. Both are legacy formats from different eras and domains — MP1 from early 1990s multimedia, AMR from late 1990s mobile telecommunications.

This conversion takes MP1 audio (typically 384 kbps stereo) and dramatically compresses it to AMR-NB (8 kHz mono, 4.75-12.2 kbps). The quality degradation is extreme, making this conversion only appropriate for speech content destined for telephony systems.

If you have speech recordings stored as MP1 (from VCD or early digital systems) that need to be deployed on telephony platforms — IVR systems, voicemail, or MMS distribution — AMR is the required codec. This is a niche conversion bridging two legacy ecosystems.

AMR is still the default voice recording format on many feature phones and some Android devices. Converting MP1 speech content to AMR ensures compatibility with these mobile recording and playback systems.