A representative for Swift said he died Tuesday morning in Tacoma, Washington. A GoFundMe account for Swift set up earlier in June said he was hospitalized due to a serious medical condition.
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The Black Keys' Dan Auerbach and Patrick Carney said in a post on their Facebook page that Swift was "one of the most talented musicians we have ever worked with." Swift released his own albums as well, but was a valued studio producer and musician for many rock bands.
He is credited on albums by The Pretenders, Nathaniel Rateliff and the Night Sweats and Ray LaMontagne.