Determining that Audio Includes Music and then Identifying the Music as a Particular Song

A computerized system, comprising:

• one or more processors;
• and
• one or more computer-readable devices including instructions that, when executed by the one or more processors, cause performance of operations comprising:
• storing, by a computing device, reference song characterization data that identify a plurality of audio characteristics for each reference song in a plurality of reference songs;
• receiving, by the computing device, digital audio data that represents audio recorded by a microphone;
• determining, by a first processor of the computing device and using a music determination process, whether the digital audio data represents music, wherein the determining includes converting the digital audio from a time-domain format into a first frequency-domain format;
• recognizing, by a second processor of the computing device after determining that the digital audio data represents music, that the digital audio data represents a particular reference song from among the plurality of reference songs, wherein the recognizing includes converting the digital audio data from the time-domain format into a second frequency-domain format, wherein the first processor and the second processor are distinct hardware processors included in the computing device, the first processor operating at a lower voltage than the second processor;
• and
• outputting, by the computing device in response to recognizing that the digital audio data represents a particular reference song from among the plurality of reference songs, an indication of the particular reference song.

A computing system, comprising:

• a microphone configured to record an audio signal;
• an analog-to-digital converter configured to generate digital audio data from a recorded audio signal;
• one or more computer-readable memory devices that store:
• (i) reference song characterization data that identify a plurality of audio characteristics for each reference song in a plurality of reference songs, and
• (ii) instructions that are executable by processors and configure operation of the processors;
• a first processor configured to output an indication that the digital audio data represents music upon determining that the digital audio data represents music, wherein the determining includes converting the digital audio data from a time-domain format into a first frequency-domain format;
• a second processor configured to receive from the first processor the indication that the digital audio data represents music, and recognize that the digital audio data represents a particular reference song from among the plurality of reference songs, wherein the recognizing includes converting the digital audio data from the time-domain format into a second frequency-domain format, wherein the first processor and the second processor are distinct hardware processors included in the computing system, the first processor operating at a lower voltage than the second processor;
• and
• a display device configured to present an identification of the particular reference song responsive to the second processor recognizing that the digital audio data represents the particular reference song from among the plurality of reference songs.