Characterization and simulation of writing instruments

A writing instrument characterization method comprising:

• receiving an audio input associated with a writing instrument while in use;
• receiving a haptic input associated with the writing instrument while in use;
• and
• generating an adaptive feedback model based on the audio input and haptic input.

At least one machine-readable storage medium, comprising a plurality of instructions that, responsive to being executed with processor circuitry of a computer-controlled device, cause the computer-controlled device to:

• receive an audio input associated with a writing instrument while in use;
• receive a haptic input associated with the writing instrument while in use;
• and
• generate an adaptive feedback model based on the audio input and haptic input.