Does the AAC to AC3 converter keep ID3 / metadata tags?
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Yes — title, artist, album, year, track number, and album art are read from the AAC container and written into the AC3 container where the format supports tags. All common targets (MP3, AAC, FLAC, OGG) handle tags fine; raw WAV does not.
我可以批量转换成 AAC 成百上千个文件 AC3 吗?
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Yes — drop a folder of AAC 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.
Yes — uploaded AAC files are processed in isolated workers and deleted within minutes. We never play back, store long-term, or share the audio content. The full retention window is in /privacy/.
转换一个 1小时 AAC 到 AC3 需要多久?
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Same-codec re-mux: 10 to 30 seconds. Re-encode to a different codec: typically 10 to 20% of source duration, so a 1-hour AAC → AC3 finishes in 6 to 12 minutes. Batch jobs parallelize across workers for further speedups.
Why is the AC3 louder or quieter than the AAC source?
If the AAC download is unprotected (no DRM), yes. DRM-encrypted streams (Spotify, Apple Music tracks) are encrypted at the bit level and we cannot process them. Bandcamp, SoundCloud downloads, personal recordings, and podcast files convert cleanly.
