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Playlist Creation via Breathalyzer

Playlist Creation via Breathalyzer. Eddie Bertot MMI593 – DSP for Embedded Audio Devices Spring, 2010. What is it???.

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Playlist Creation via Breathalyzer

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  1. Playlist Creation via Breathalyzer Eddie Bertot MMI593 – DSP for Embedded Audio Devices Spring, 2010

  2. What is it??? • An alternative approach to musical playlist creation via human-computer interaction (HCI). Specifically, a specialized protocol is discussed and implemented as the interface between an iPhone/iPod-Touch and an external gas-sensing circuit. A user first interacts with the system through a graphical UI and a basic breathalyzer. Values from the breathalyzer are analyzed and the device queues a playlist based on a predetermined set of predicates. In a nutshell: Depending on how inebriated you are, your iPod/iPhone plays different music

  3. Basic Operation:

  4. User Interface • First, hook everything up and give the breathalyzer 9-12VDC • Press “Upload BAC Level” and blow through the unit – a value shows • Then generate a playlist!

  5. Media Playback • The “Import Playlist” button is pressed, and playback begins • Play/Pause and Skip • Current song is shown

  6. Info Page • In case you don’t know what to do…

  7. On the Inside…

  8. Signal Flow

  9. The Protocol • For transmission of data to iPhone, a binary protocol was used. Its design was based primarily around the iPhoneaudio hardware: • Slew Rate (frequency) limitations • Capacitive nightmare

  10. How does it know?! It’s rough, but it works. Believe me. I’ve used it.

  11. Demonstration

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