Convert to M4A
M4A is an MPEG-4 audio container holding AAC audio โ the default format of iPhone Voice Memos and iTunes, natively supported by Apple devices. This group transcodes MP3, WAV and video soundtracks to M4A โ 3 conversion directions.
The quality parameter maps to a 64-256kbps bitrate; AAC sounds better than MP3 at equal bitrate. Metadata is stripped on output. Sample rate, channel and segment trimming are supported.
MP3โM4A
Transcodes MP3 to M4A (AAC up to 256kbps) in an MPEG-4 container for iTunes libraries and ringtone creation.
WAVโM4A
Encodes WAV PCM to M4A AAC, cutting size by about 80% for distributing recordings and spoken content on iPhone and iPad.
MP4โM4A
Extracts the MP4 audio track as AAC in an M4A container (64โ256kbps, faststart) for native playback across the Apple ecosystem.