US Patent 9690382 Devices, methods, and graphical user interfaces for haptic mixing

An electronic device receives a plurality of requests to generate a plurality of tactile outputs, including two or more overlapping tactile outputs, using the one or more tactile output generators. In response, the device generates and outputs combined tactile outputs. If the plurality of tactile outputs exceeds a threshold number of tactile outputs that is permitted to be mixed together for concurrent output, the device mixes a subset of the plurality of tactile outputs together into a combined tactile output that excludes at least one of the plurality of tactile outputs to produce a combined tactile output that is output via the device's one or more tactile output generators.