1. A method employing a portable device that includes a processor, a microphone for capturing audio, a camera system for capturing frames of imagery, an image recognition module for responding to features recognized in frames of captured imagery, and a fingerprinting module for song recognition, the method comprising: providing captured audio from the microphone to a speech classifier; disabling the fingerprinting module for a first portion of the captured audio, when the speech classifier indicates said first portion is speech; processing a second portion of the captured audio with the fingerprinting module, when the speech classifier indicates said second portion is non-speech; monitoring utilization of the processor; and based on said monitoring, causing the image recognition module to skip processing of one or more frames of image data while the fingerprinting module is processing said second portion of the captured audio.