FLAC keeps every bit of a lossless recording, but not every app or car stereo plays it, and the files are large to sync. Filemorph makes a smaller M4A copy on your iPhone for the places FLAC does not reach, while leaving the original FLAC untouched.
A lossless library is worth keeping exactly as it is — that is the point of FLAC — but a phone, a car system or a streaming app that only understands AAC or MP3 cannot play it directly. Converting a copy to M4A gives you a portable version for those situations without touching the FLAC master.
Filemorph decodes the FLAC and encodes the result to AAC using Apple's AVFoundation, writing an M4A file alongside the original. The FLAC on disk is never modified — this creates a second, smaller file for playback, not a replacement.
In the app: Transcode (Output Format: M4A).
Keeping a lossless FLAC library and needing a portable copy for a phone, a car or an app that does not support FLAC are not conflicting goals — you can have both. A smaller M4A copy solves the compatibility problem without giving up the lossless original.
Yes. Unlike web converters that upload your files to a server, Filemorph converts every file locally using Apple's frameworks. Nothing leaves your device, and it works with no internet connection. This operation is part of Filemorph Pro ($29.99/year, 7-day free trial on monthly and annual plans).
No, Filemorph writes a new M4A file. The original FLAC stays exactly as it was, in its original location.
It will sound very close at a reasonable bitrate, but M4A is a lossy format and FLAC is lossless, so some detail is discarded in the conversion. Keep the FLAC as your archival copy and use the M4A for everyday listening.
No, audio Transcode is part of Filemorph Pro ($29.99 a year, 7-day free trial on monthly and annual plans).
On-device, no upload. Plus 300+ more file operations.
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