  Learning to program an audio production VST plugin is a time consuming
process, usually obtained through inefficient trial and error and only mastered
after extensive user experience. We propose a white-box, iterative system that
provides step-by-step instructions for applying audio effects to change a
user's audio signal towards a desired sound. We apply our system to Xfer
Records Serum: currently one of the most popular and complex VST synthesizers
used by the audio production community. Our results indicate that our system is
consistently able to provide useful feedback for a variety of different audio
effects and synthesizer presets.
