oxAdditiveWork 1.1 for Mac could be downloaded from the developer's website when we last checked. We cannot confirm if there is a free download of this app available.
According to the results of the Google Safe Browsing check, the developer's site is safe. Despite this, we recommend checking the downloaded files with any free antivirus software. OxAdditiveWork for Mac lies within Audio & Video Tools, more precisely Music Production. This free Mac app was originally produced by Flexatone.
From the developer:
A simple additive synthesizer with variable envelope and individual control of each harmonic's amplitude and phase