(written from a Production point of view)
David Senescu is a musician who appeared as the wedding trumpet player in Star Trek Nemesis. As a background actor, he received no credit and was identified by the name tag of his costume which was sold off on the It's A Wrap! sale and auction on eBay. 
In 2007 he was the rhythm guitarist for the technical death metal/progressive metal band Cynic on their tour and during the recording for their studio album. But Senescu left during the recording and was replaced in 2008.