The best CD Ripper alternative to MP3Gain is foobar2000. It's not free, so if you're looking for a free alternative, you could try foobar2000 or Zortam. If that doesn't suit you, our users have ranked more than 10 alternatives to MP3Gain and three of them are CD Rippers so hopefully you can find a suitable replacement.
Audio player offering MP3, FLAC support, gapless playback, customizable interfaces, CD ripping, advanced tagging, ReplayGain, plugins, and is known for its freeware model, running on various Windows versions with high audio fidelity.
Zortam Mp3 Media Studio is all-in-one Mp3 application suite. It has several modules such us Zortam Mp3 Auto Tagger, Mp3 Organizer, ID3 Tag Editor, Mp3 Player, Mp3 Normalizer, BPM (Beats Per Minute) Analyzer, CD and DVD Ripper, Mp3 to Wav converter.
soundKonverter is a frontend to various audio converters. The key features are: Audio conversion. En-/decoding. Replay Gain. CD ripping. It is extendable by plugins and supports many backends. It supports reading and writing tags for many formats, so the tags are preserved when c.
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It's just a front-end that supports multiple converters that need to be installed separately, including an MP3Gain-like engine, which may not even be possible to install as-is on Linux, so it's misleading to say that because soundKonverter works on Linux it's a Linux equivalent to MP3Gain. It's far from such a thing.