1. Dual rows of 40 LED displays
2. Two-channel, input and output audio interface, eliminating the need for one-and-two audio cables
3. No automatic gain, can be adjusted manually
4. USB power supply
5. The cost is about 10 yuan, suitable for electronic DIY enthusiasts to make.
Modified from the project: https://www.bilibili.com/video/BV1aJ411h7b4?from=search&seid=10158457856315313803
Demonstration effect: https://www.bilibili.com/video/BV1gK411J7su
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