Non-profit SoundExchange collects and distributes performance royalties from non-interactive digital music services for artists and record labels. Since inception, SoundExchange has paid more than $1 billion in royalties to the creators of music. Now Pandora and other digital broadcasters are pushing for cuts that could mean the payments could drop by as much as 80%, at least temporarily. Late last week, 125 major artists signed an open letter opposing the plan. “This distribution represents yet another record-setting quarter for SoundExchange, but means so much for the recording artists and record labels that rely upon this growing revenue stream. Musicians and rights owners - both superstars and rising stars - have come to depend on these royalty payments,” said Michael Huppe, president of SoundExchange.