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zike
11-26-2017, 12:23 AM
As a fan of Teensy and the amazing engineer/artist/composer Jeroboam Fenderson (https://www.youtube.com/watch?v=YqSvkNjWnnQ), and also a collector of antique oscilloscopes (https://groups.yahoo.com/neo/groups/TekScopes/conversations/topics), I was inspired (compelled?) to build this simple stereo player / scope XY display driver.

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A T3.2 with audio shield and SparkFun TeensyView OLED display cycles through stereo .WAV files loaded on micro SD, and plays them to both headphones and line level BNC jacks. Driving scope X and Y with the left and right channels respectively, while listening to these works (http://oscilloscopemusic.com), renders a mind-blowing audio-visual experience. Downsampling the files to 44.1 kHz lost a bit of high-order detail, but graphics are still stunning on a sharp CRT. And the audio is awesome (of course). Makes an irresistible analog scope demo. I set it up to play test signals from the audio library if no SD card is inserted.

Everything is off the shelf from PJRC, SparkFun or the corner drugstore ($0.99 plastic box). Support the artist by purchasing his work, as I have done, and liking his youtube posts.

KrisKasprzak
12-07-2017, 12:42 PM
Do you have a YouTube video on this device in action?

zike
12-09-2017, 01:05 AM
EDIT: demo video (https://youtu.be/DjsQzPSOPbU) is now up for preview. Comments/suggestions welcome.

Robin
06-24-2018, 05:23 PM
This project went up on the blog today :)
https://www.pjrc.com/oscilloscope-music-visualizer/