int32 read sample data of the set slot
frac32.positive startpoint
int32.positive offset
int32.positive range
int32.positive playmode
objref lpr
outlet_offset = attr_lpr.array[inlet_slot << 2];
outlet_range =
(attr_lpr.array[(inlet_slot << 2) + 1] - attr_lpr.array[inlet_slot << 2]);
outlet_playmode = attr_lpr.array[(inlet_slot << 2) + 2];
outlet_startpoint = attr_lpr.array[(inlet_slot << 2) + 3];