How do I convert AIFF audio to AMR without losing quality?
+
Upload the AIFF file and our converter chooses the AMR codec / bitrate combination that matches the source. Lossless target (AMR = WAV / FLAC / ALAC) preserves every sample; lossy target (AMR = MP3 / AAC / OGG) defaults to 192 kbps which is transparent for most ears.
What bitrate does the AMR file use?
+
Default 192 kbps for lossy AMR; pass-through for lossless AMR. 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 AIFF to AMR reduce my audio quality?
+
If AIFF is lossy and AMR is lossless (e.g. MP3 → WAV), the AMR file is no better than the AIFF — you can't recover information that's already been thrown away. If AIFF is lossless and AMR is lossy, expect the AMR codec to recompress; at 192 kbps this is transparent for most content.
Does the AIFF to AMR converter keep ID3 / metadata tags?
+
Yes — title, artist, album, year, track number, album art are read from AIFF and written into the AMR container (where the AMR format supports tags, which all common ones do).
Can I batch convert hundreds of AIFF files to AMR?
+
Yes — drop a folder of AIFF 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 AMR keep the same sample rate as AIFF?
+
By default yes (48 kHz AIFF → 48 kHz AMR). 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 AIFF to AMR step?
+
Yes — the loudness-normalize option applies ITU-R BS.1770 / EBU R128 normalization to the AMR output, targeting -14 LUFS (streaming standard) or -16 LUFS (podcast standard). Useful when batch-converting tracks with varying mastering levels.
Will the AMR play on my car stereo / iPod / Sonos?
+
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 AIFF file private during conversion?
+
Yes — uploaded AIFF 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 AIFF to AMR take?
+
Same-codec re-mux: 10-30 seconds. Re-encode to a different codec: typically 10-20% of source duration, so a 1-hour AIFF → AMR finishes in 6-12 minutes.
Why is the AMR file louder / quieter than the AIFF source?
+
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 AIFF streaming downloads to AMR?
+
If the AIFF 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.