Scalefreq Generator

Scalefreq Generator is a tool for rendering frequencies of notes / musical scales into various output formats. It’s primarily aimed for mixing/mastering engineers and other musical interested people. The frequencies of musical scale or non-scale notes (inverse) are important in mixing and mastering situations. E.g. non-scale frequencies are often attenuated using an EQ.

Scalefreq consists of a core system, a render-plugin architecture and a graphical frontend for convenient user interaction.

http://blog.airmann.de/scalefreq-generator-v1-0/