MPEG-4 Audio Book (M4B) is an AAC-based format with chapter markers, designed specifically for audiobooks and long-form listening.
Protracker Module (MOD) is a tracker music format originating from the Amiga demoscene, containing both note patterns and instrument samples.
Reach for M4B when your priority is audiobooks, podcasts with chapters — its efficient compression makes sharing fast and storage minimal.
Reach for MOD when your priority is chiptune music, demoscene, retro game audio — its uncompromising quality ensures every detail is preserved.
Learn more about M4B and MOD formats in our detailed guide.
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M4B (M4B audiobooks) - MPEG-4 Audio Book, AAC with chapter support. Best for audiobooks, podcasts with chapters.
MOD (MOD music) - Protracker Module, tracker music format for demoscene and games. Ideal for chiptune music, demoscene, retro game audio.
Yes, GoConvertFile offers free conversion of M4B to MOD for files up to 100MB. No registration required.
Most M4B to MOD conversions complete within seconds for standard-sized files. Larger files may take longer depending on the conversion complexity.
MOD is ideal for chiptune music, demoscene, retro game audio. Protracker Module, tracker music format for demoscene and games
No, converting M4B to MOD does not cause additional quality loss — MOD uses lossless compression. However, any artifacts already present in the original M4B file will persist in the MOD output.
MOD files are typically 2-5x larger than equivalent M4B files because MOD preserves all pixel data. This is expected and necessary for lossless quality.