http://www.solid-state-logic.com/music/Duality/index.asp
http://barefootsound.com/micromain27/
http://www.benchmarkmedia.com/
http://www.bricasti.com/m7.html
http://www.uaudio.com/hardware.html
http://www.empiricallabs.com/distressor.html
http://www.apiaudio.com/2500.html
http://www.manley.com/mmmsmp.php
http://www.heartechnologies.com/hb/hearbacksystem.htm
http://www.mcdsp.com/index.php?option=com_content&task=blogsection&id=9&Itemid=138
http://izotope.com/products/audio/rx/
https://www.bhphotovideo.com/c/browse/Recording/ci/20172/N/3992462121