Adam Sampson's distortion bookmarkshttps://bookmarks.offog.org/ats/distortionAdam Sampson2016-09-04T17:22:30ZArticles and Schematicshttps://bookmarks.offog.org/edit?url=http%3A%2F%2Fwww.runoffgroove.com%2Farticles.html2016-09-04T17:22:30ZA variety of interesting guitar pedal designs -- many based on FET-ified versions of guitar amps. The EQ pedal in particular looks interesting.Tonewheel Tubeworkshttps://bookmarks.offog.org/edit?url=http%3A%2F%2Fwww.keyboardpartner.de%2Findex_old.shtml2016-08-27T17:54:15ZGerman Hammond technician. This has some interesting mods for the T-200 series, which are effectively transistorised versions of the L-100 -- e.g. adding a valve distortion unit based on Russian miniature valves. I also like his tonewheel level calibration software...Spectrally Challenged - distortion spectra of audio power chipshttps://bookmarks.offog.org/edit?url=http%3A%2F%2Fwww.hembrow.eu%2Fpersonal%2Fspectrallychallenged.html2016-03-31T13:53:32Z"This very interesting article by Ben Duncan appeared in the October 1993 issue of Electronics World + Wireless World magazine in the UK. In it, the author tests ten popular power amplifier chips and explains, amongst other things, how the distortion spectra are important in terms of sound quality." The LM386 is -- as expected -- terrible.CordellAudio.com - Papershttps://bookmarks.offog.org/edit?url=http%3A%2F%2Fwww.cordellaudio.com%2Fpapers%2F2013-07-11T18:03:25ZSome interesting publications on analysing audio equipment (on a minimal budget).