Perennial Swarm (PS) is primarily the work of two brothers (one in KY and one in DC). Collaboration between the two is largely internet based. Once a year the two get together and record proper versions of selected songs from the year's rough drafts (and descend upon a few coffee/tea shops for captive audiences). PS is one of five "sounds" (see ABOUT) the duo attempts to work within. Its all beyond informal...quite pleasant, actually.
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IF you want to contribute to any of these-collaboration would be great; just download a song, add to it, and email it back or post it to your own page (just make sure folks are properly credited with their contribution). We like music-keep doing what you're doing...and collaboration never hurts.