<P> The recording features an acoustic guitar tuned to EEEEBE ("Bruce Palmer Modal Tuning") vs. the standard EADGBE tuning . This style of tuning would later be used for the Déjà Vu songs "4 + 20" and "Carry On". </P> <P> CSN performed "Suite: Judy Blue Eyes" at the Woodstock and Live Aid festivals, and their performance at the former is featured in the film Woodstock (1970). </P> <P> The title "Suite: Judy Blue Eyes" refers to Stephen Stills' former girlfriend, singer / songwriter Judy Collins, and the lyrics to most of the suite's sections consist of his thoughts about her and their imminent breakup . Collins is known for her piercing blue eyes . During a July 15, 2007 interview for the National Public Radio program Just Roll Tape, Stills revealed that Collins was present in the studio when the demo tapes were recorded . Collins had advised Stills "not to stay (at the studio) all night ." Stills later commented that "the breakup was imminent...we were both too large for one house ." Stills said that he liked parts of this demo version of "Suite: Judy Blue Eyes" better than the released version . </P> <P> Collins and Stills had met in 1967 and dated for two years . In 1969, she was appearing in the New York Shakespeare Festival musical production of Peer Gynt and had fallen in love with her co-star Stacy Keach, eventually leaving Stills for him . Stills was devastated by the possible breakup and wrote the song as a response to his sadness . In a 2000 interview, Collins gave her impressions of when she first heard the song: </P>

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