Presentation on theme: "P LAYLIST C REATION VIA B REATHALYZER Eddie Bertot MMI593 – DSP for Embedded Audio Devices Spring, 2010."— Presentation transcript:
P LAYLIST C REATION VIA B REATHALYZER Eddie Bertot MMI593 – DSP for Embedded Audio Devices Spring, 2010
W HAT 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
B ASIC O PERATION :
U SER I NTERFACE 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!
M EDIA P LAYBACK The “Import Playlist” button is pressed, and playback begins Play/Pause and Skip Current song is shown
I NFO P AGE In case you don’t know what to do…
O N THE I NSIDE …
S IGNAL F LOW
T HE P ROTOCOL 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
H OW DOES IT KNOW ?! It’s rough, but it works. Believe me. I’ve used it.