McDSP 4030 Retro Comp HD v7HD: AAX DSP Native, AU, VST3 The 4030 Retro Compressor is a unique dynamic range control topology. It is coupled with a wet dry mix control to balance compressed and uncompressed signals. An active attack and release design allows aggressive compression settings with minimal artifact generation. All Retro plug ins use a McDSP designed output stage that puts a unique transformer like touch on the audio signal. Retro plug ins are a line of classics that