static boost::shared_ptr<Source> createFromPlaylist
(DataType type, Session& s, boost::shared_ptr<Playlist> p, const PBD::ID& orig, const std::string& name,
uint32_t chn, frameoffset_t start, framecnt_t len, bool copy, bool defer_peaks);
static boost::shared_ptr<Source> createFromPlaylist
(DataType type, Session& s, boost::shared_ptr<Playlist> p, const PBD::ID& orig, const std::string& name,
uint32_t chn, frameoffset_t start, framecnt_t len, bool copy, bool defer_peaks);