Amadeus on Mojave
The latest version (2.4.7) works fine on Mojave, but does not support dark mode yet. This is planned for version 2.5, due to be released very soon. A link to a preview version is available here.


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Amadeus Lite
The intuitive yet powerful wave editor

Amadeus Lite is an intuitive and powerful wave editor supporting a variety of sound formats including AIFF, Wave, MP3, WMA, AAC, Ogg Vorbis, Apple Lossless, and many others. Learn More...

I have found it quite effective, fast, and stable. So far, I haven’t had to even look at the manual to find out how to do something.
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Amadeus Pro
The swiss army knife of sound editing

Amadeus Pro is a powerful multitrack audio editor supporting a variety of formats including MP3, AAC, Ogg Vorbis, Apple Lossless, AIFF, Wave and many others. Learn More...

Amadeus Pro is definitely the best audio editor I've ever used.