premise: John Frusciante has an active business.
hypothesis: John Anthony Frusciante ( [ fruːˈʃɑːnteɪ ] born March 5 , 1970 ) is an American guitarist , singer , producer and composer . Frusciante has an active solo career , having released eleven solo albums and five EPs ; his recordings include elements ranging from experimental rock and ambient music to new wave and electronica . He has also recorded with numerous other artists , including The Mars Volta , for whom he was a studio guitarist ( and occasional live performer ) from 2002 until 2008 ; Josh Klinghoffer and Joe Lally , with whom he released two albums as Ataxia ; and various collaborations with both Klinghoffer and Omar Rodríguez-López . He has also produced and/or recorded with Duran Duran , Wu-Tang Clan , The Mars Volta and Omar Rodriguez Lopez , Swahili Blonde , Black Knights , The Bicycle Thief , Glenn Hughes , Ziggy Marley , Johnny Cash , George Clinton , Johnny Marr and others . He became a recluse and entered a long period of drug addiction , during which he released his first solo recordings : Niandra Lades and Usually Just a T-Shirt ( 1994 ) and Smile from the Streets You Hold ( 1997 ) .