Review on Rodipu DIY 12 Level Dual Audio Spectrum Display: A Superior VU Meter Amplifier Board for Musicians by Sarah Phillips
This is not what is said.
The name of the product indicates that it is a spectral indicator. The specs state that iot is just an output level meter. (No frequency analysis.)
- The input signal is isolated by an operational amplifier to avoid the high-frequency noise of a single-chip computer in the audio.
- Low maintainability
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