Often a disk or file is corrupted--allow sampling of the output on the fly, allow interrupt to recheck/clean disk or repair file, then allow resumption either from place marked as bad, or from point conversion was interrupted. Then you would not disc

Often a disk or file is corrupted--allow sampling of the output on the fly, allow interrupt to recheck/clean disk or repair file, then allow resumption either from place marked as bad, or from point conversion was interrupted. Then you would not discover bad spots when viewing with room full of friends!