Signal limit based on detecting clipping

A system comprising:

• a playback device comprising a sealed enclosure and an audio system carried by the sealed enclosure, wherein the audio system comprises an amplifier, a voice coil, a magnet assembly, and a moveable surface, wherein movement of the voice coil in response to electrical signals received via the amplifier causes corresponding movement of the moveable surface within an excursion range;
• an input interface;
• at least one sensor;
• at least one processor;
• and
• at least one non-transitory computer-readable medium comprising program instructions that are executable by the at least one processor such that the system is configured to:
• receive, via the input interface, data representing audio content;
• predict, based on the received data and a transducer model, that playback of the audio content via the amplifier and the voice coil will cause the moveable surface to exceed an excursion limit of the excursion range;
• modify, based on the transducer model, portions of the audio content to limit excursion of the moveable surface to less than the excursion limit;
• play back the modified audio content via the amplifier and the voice coil;
• during playback of the modified audio content, determine, via the at least one sensor, one or more positions of at least one of the moveable surface and the voice coil;
• generate a feedback signal based on the one or more determined positions;
• and
• adjust the transducer model to reduce error represented by the generated feedback signal.

At least one non-transitory computer-readable medium comprising program instructions that are executable by at least one processor such that a playback device is configured to:

• receive, via an input interface, data representing audio content, wherein the playback device comprises:
• a sealed enclosure and an audio system carried by the sealed enclosure, wherein the audio system comprises an amplifier, a voice coil, a magnet assembly, and a moveable surface, wherein movement of the voice coil in response to electrical signals received via the amplifier causes corresponding movement of the moveable surface within an excursion range;
• predict, based on the received data and a transducer model, that playback of the audio content via the amplifier and the voice coil will cause the moveable surface to exceed an excursion limit of the excursion range;
• modify, based on the transducer model, portions of the audio content to limit excursion of the moveable surface to less than the excursion limit;
• play back the modified audio content via the amplifier and the voice coil;
• during playback of the modified audio content, determine, via at least one sensor, one or more positions of at least one of the moveable surface and the voice coil;
• generate a feedback signal based on the one or more determined positions;
• and
• adjust the transducer model to reduce error represented by the generated feedback signal.