Electronic professional audio consumer goods, namely, mastering limiters, mastering equalizer apparatus, mastering compressors, bus compressors, audio limiters, audio equalizers, audio compressors; audio processing equipment, namely, mastering limiters, mastering equalizer apparatus, mastering compressors, bus compressors, audio limiters, audio equalizers, audio compressors; downloadable software for audio engineering; audio compressor, equalizer, and limiter apparatus