Downloading Aeon Standalone 4.1.1 for Mac from the developer's website was possible when we last checked. We cannot confirm if there is a free download of this app available. The following version: 1.1 is the most frequently downloaded one by the program users.
This program's bundle is identified as com.soundspectrum.Aeon.standalone. Please check the Mac app with an antivirus before launch as it is downloaded from the developer's website, and we cannot ensure that it is safe. The actual developer of this software for Mac is SoundSpectrum, Inc.
From the developer:
Aeon Standalone visualizes any sound input source supported by your computer, including line-in audio, CD audio, and microphone input. You can use it to visualize live performances or streaming radio broadcasts. Aeon Standalone is essential when you want to visualize audio that doesn't exist in the form of an audio file (e.g. mp3, m4a, etc), such as live audio output directly from a CD player or stereo.
You may want to check out more Mac applications, such as Aeon Timeline, Alter Aeon or Mystic Destinies Serendipity of Aeons, which might be similar to Aeon Standalone.
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