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Playlist Creation via Breathalyzer. Eddie Bertot MMI593 – DSP for Embedded Audio Devices Spring, 2010. What is it???. - PowerPoint PPT Presentation
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PLAYLIST CREATION VIA BREATHALYZEREddie BertotMMI593 – DSP for Embedded Audio DevicesSpring, 2010
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
BASIC OPERATION:
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!
MEDIA PLAYBACK The “Import Playlist”
button is pressed, and playback begins
Play/Pause and Skip
Current song is shown
INFO PAGE In case you don’t
know what to do…
ON THE INSIDE…
SIGNAL FLOW
THE PROTOCOL For transmission of data to iPhone, a binary
protocol was used. Its design was based primarily around the iPhone audio hardware: Slew Rate (frequency) limitations Capacitive nightmare
HOW DOES IT KNOW?!
It’s rough, but it works. Believe me. I’ve used it.
Demonstration
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