How do I convert M4A audio to AIFF without losing quality?
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Upload the M4A file and our converter chooses the AIFF codec / bitrate combination that matches the source. Lossless target (AIFF = WAV / FLAC / ALAC) preserves every sample; lossy target (AIFF = MP3 / AAC / OGG) defaults to 192 kbps which is transparent for most ears.
What bitrate does the AIFF file use?
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Default 192 kbps for lossy AIFF; pass-through for lossless AIFF. Override to 320 kbps for audiophile or 96 kbps for voice / podcast. The choice trades file size against audible fidelity at very low bitrates.
Will going from M4A to AIFF reduce my audio quality?
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If M4A is lossy and AIFF is lossless (e.g. MP3 → WAV), the AIFF file is no better than the M4A — you can't recover information that's already been thrown away. If M4A is lossless and AIFF is lossy, expect the AIFF codec to recompress; at 192 kbps this is transparent for most content.
Does the M4A to AIFF converter keep ID3 / metadata tags?
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Yes — title, artist, album, year, track number, album art are read from M4A and written into the AIFF container (where the AIFF format supports tags, which all common ones do).
Can I batch convert hundreds of M4A files to AIFF?
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Yes — drop a folder of M4A files in and we process them in parallel. Premium has more parallel workers and no per-file size cap, so a 500-file batch finishes in minutes rather than tens of minutes.
Will the AIFF keep the same sample rate as M4A?
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By default yes (48 kHz M4A → 48 kHz AIFF). If you need to downsample for compatibility (e.g. 96 kHz → 44.1 kHz for CD burning) the advanced sample-rate option does this with high-quality resampling.
Can I normalize loudness in the M4A to AIFF step?
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Yes — the loudness-normalize option applies ITU-R BS.1770 / EBU R128 normalization to the AIFF output, targeting -14 LUFS (streaming standard) or -16 LUFS (podcast standard). Useful when batch-converting tracks with varying mastering levels.
Will the AIFF play on my car stereo / iPod / Sonos?
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MP3 plays universally. AAC plays on Apple, most Android, Sonos. FLAC plays on Sonos and Android, less well on older iPods. WAV plays on everything but is huge. The advanced options include device presets for these common targets.
Is my M4A file private during conversion?
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Yes — uploaded M4A files are processed in isolated workers and deleted within minutes. We never play, store, or share the audio content.
How long does converting a 1-hour M4A to AIFF take?
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Same-codec re-mux: 10-30 seconds. Re-encode to a different codec: typically 10-20% of source duration, so a 1-hour M4A → AIFF finishes in 6-12 minutes.
Why is the AIFF file louder / quieter than the M4A source?
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No automatic gain change happens unless you turn on the normalize option. If you do see a level change, your audio player or media library may be applying ReplayGain or per-track normalization on playback — not us.
Can I convert M4A streaming downloads to AIFF?
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If the M4A download is unprotected (no DRM), yes. DRM-encrypted streaming files (Spotify, Apple Music) are encrypted at the bit level and we can't process them. Sources from Bandcamp, SoundCloud download, and personal recordings convert fine.