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"The Diminisher" is the alter-ego of Chicago musician David McDonnell (born 1976), who was a founding member of the trio Bablicon, bass player Griffin Rodriguez informally assigned the moniker in reference to McDonnell's liberal use of the so-called diminished chord in Bablicon songs. When Bablicon informally dissolved in 2001, he began or joined a number of experimental jazz/rock projects, such as Michael Columbia and Icy Demons, and continued composing in Chicago.
In 2006, McDonnell released a solo album on the label Unsound Records, titled Imaginary Volcano, under the name of The Diminisher.
- "The Diminisher: Imaginary Volcano". JIVE Magazine. October 9, 2006. Retrieved 2 December 2009.