Convert MP1 to AIFF — Free Online Converter

Converting MP1 to AIFF decodes the compressed MPEG Audio Layer 1 bitstream and stores the resulting PCM audio in Apple's uncompressed AIFF format. This conversion is useful for editing MP1 audio in professional DAWs that work optimally with uncompressed formats, or for archiving decoded MP1 content in a lossless container.

MP1 was the first standardized perceptual audio codec (ISO 11172-3, 1993), using subband coding with 32 subbands. The decoded audio from MP1 contains compression artifacts from the original encoding — converting to AIFF preserves these artifacts as-is in an uncompressed container without adding any additional degradation.

DAWs like Logic Pro and Pro Tools work most efficiently with uncompressed AIFF for timeline editing, mixing, and processing. If you have MP1 audio from VCD archives or DAB recordings that needs professional editing, converting to AIFF provides an edit-friendly format.

AIFF also serves as a preservation format — once decoded to AIFF, the audio can be re-encoded to any other format without re-decoding MP1. This is useful when you need to create multiple output formats from a single MP1 source.

FFmpeg decodes the MP1 bitstream's 32-subband filter bank to reconstruct PCM samples, then writes the audio into an AIFF container with big-endian byte order. The output is typically 16-bit/44.1 kHz (matching CD quality). The decoded audio is limited to the quality of the MP1 source — no information is gained by expanding to uncompressed format. The AIFF file will be approximately 10-15x larger than the MP1 source at typical bitrates.