His marketing tag was "and his Whispering Organ Sound". Swanson played Allen organs, which he would extensively modify. Richard Nixon was reported to be a fan of Swanson's music. In the late 1960s and very early 1970s his singles appeared among the most popular selection in the Midwest for jukeboxes oriented towards "adult" and "oldies" locations. A "Greatest Hits" compilation released on Thunderbird in 1970 was accorded a four-star rating by Billboard. His recordings were reviewed three decades later as "majestically cheezy."