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
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How does the coffee taste? I hope that 7 cups will not be a little higher, just a joke.
I want to DIY, but I can’t find the PCB file download for the audio board. Since I am in China, it is difficult for me to buy audio boards on that website.
Hi Toms Lee,
Coffee taste fine thank you very much!
For the audio visualizer, I only designed the backplane. the gerber files can be downloaded here:
However, you are referring to the teensy audio board, that is a oem product…
I didn’t design it. I know the schematics are out there….but as a fact, I also know that the audio chip on it is not available or hard to get because of the chip shortage.
In fact, my first pcb design didn’t use the audio board and I integrated the audio chip in my own design but because of the shortage, I had to switch to the audio board.
I read the website introduction. Is this TFT?
I have another idea. Is it better to use OLED?
https://opencircuit.nl/product/rgb-320×240-tft-touchscreen-2.8-inch-ili9341?affiliate=OF4I5VXRPF
I read the website introduction. This one uses touch TFT?
Audio Adaptor Board voor Teensy 4.0 / I bought it in China. Great.
Thank you very much for your reply.
This chip may be available in China. Where can I download your integrated PCB?
Your fans: TOMS
Thanks very much to Mr. Mark Donners for his tireless help. I succeeded in debugging. Now I will design a box to place this beautiful audio analysis display.