I have a reference disc that I use for evaluating/calibrating sound systems, monitors, control rooms...any time I need to hear some material that I'm really familiar with so I can tell what the whole playback chain is doing to a known source. I've been using these same 5 tunes for over a dozen years (finally got around to burning a single CD-R of them about 5 years ago so I didn't have to keep carrying a bunch of discs with me...maybe by next decade I'll have them ripped onto a USB stick, just in time for amorphous solid-state plasma memory to be the norm for everyone else in the industry).
They are:
- "The Infernal Dance of King Kashchei" from Igor Stravinsky's Firebird Suite, performed by the Atlanta Symphony Orchestra, Robert Shaw conducting (Telarc Records).
- "People" by King Crimson, from the album THRAK
- "So What" by Miles Davis, from Kind Of Blue
- "Airhead" by Thomas Dolby, from Aliens Ate My Buick
- "Outshined" by Soundgarden, from Badmotorfinger
But for ear cleansing I absolutely endorse complete silence, or distant environmental sounds at least. Recorded music is the last thing I want to hear to reset my bearings.