created a similar app that does exactly what CheVolume does, except this is free at least for now. I tried to make a public post about it here on /r/software, but apparently they don't allow any download links to unknown apps in a text post.

If you want to test it out, here's the download link (64-bit).

If you don't have a 64 bit OS, here's the 32 bit version.

Here's a simple gif to show how it's used.

For all feature requests/bugs/feedback, you can send me a PM. I highly appreciate all of them. The thread is now archived, so unfortunately you can't reply to it anymore.