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Amazing Twin Audio Visualizer to the rescue

Posted on June 17, 2022 by Mark Donners

This Twin Audio Visualizer is nothing other than amazing. It includes a Teensy microcontroller board that drives 2 displays simultaneously at a very high speed. Combined with a Teensy Audio Board, it is capable of doing a frequency analysis of the Audio in realtime to create a Stereo spectrum analyzer of 69 Channels.

Yep you understood me correctly! 69 channels in stereo…so that’s actually 138 frequency bins. On top of that, we will be displaying a stereo VU meter on the second display. So more or less we are really dealing with 140 channels.

This video is sponsored by @PCBWay They make great PCB board and offer good assembly service. Check out the website at https://www.pcbway.com/

With age, soldering is becoming harder and harder on the eyes. I good microscope for soldering is an absolute must have and I don’t have one yet. If you have an idea on a good one or you want me to try one, please contact me.

🕮 Manual: There is no manual for this version with two displays but the extra function is limited to the extra button that can be pressed to change the input channel Mic/Line-in. All other function remain untouched. Please refer the the manual of the original sketch by DIY-lab.
His github is here:
https://github.com/DIYLAB-DE/AudioVisualizer

🕮 Software/ firmware / sketch / documentation:
Sketch: https://github.com/donnersm/TwinVisualizer/
👨‍💻 Building instructions:
Instructables: https://www.instructables.com/Twin-Audio-Visualizer/
Schematic: https://github.com/donnersm/TwinVisualizer/blob/main/PCB/Schematic_Twin%20Audio%20Visualizer_2022-06-12.png

🛒 Buy PCB / Parts:
PCB: https://www.tindie.com/products/markdonners/twin-visualizer-pcb/
Teensy: https://opencircuit.nl/product/teensy-4-1?affiliate=OF4I5VXRPF
Ram: https://opencircuit.nl/product/8-MB-PSRAM-chip-voor-Teensy-4.1?affiliate=OF4I5VXRPF
Audio Board: https://opencircuit.nl/product/audio-adaptor-board-voor-teensy-4.0-rev-d

☕ Buy me coffee
If you like me work, please buy me a coffee to help me burning the midnight oil.
https://www.buymeacoffee.com/MarkDonners

🔀 Links in this video you should check out

Andreas, @clever3d might build you a unit if you come to an agreement.
https://www.youtube.com/channel/UCqpYx7BN6htHv7waZkzbrYg
DIY-Lab who build the original version with one display: https://diylab.de/
How to add PSRAM to your Teensy: https://www.pjrc.com/store/teensy41.html

💁‍♂️ Do you want to sponsor my channel? Feel free to contact me anytime

🔀Let’s connect
Website: http://www.theelectronicengineer.nl
facebook: https://www.facebook.com/TheelectronicEngineer
Instagram: https://www.instagram.com/theelelectronicengineer.nl/
Twitter: https://twitter.com/MarkDonners

–For automatic processing–




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"I love open source projects. Learning and sharing knowledge without being commercially exploited."
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