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      tomas replied to the thread Help with a 4 band parametric eq.
      It's hard to say without seeing the flicker on the video, but sometimes display may be having problems with keeping up with reliable transfer at high SPI clocks or the wires that you are using to connect to display are too long to transmit high...
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      tomas replied to the thread Help with a 4 band parametric eq.
      Typically flickering is because you first erase content and then you draw. Between erase and new draw there is nothing on screen and that causes flicker. To avoid that you should "never paint the same pixel twice". Don't erase the content of...
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      tomas replied to the thread Help with a 4 band parametric eq.
      Yes using FIR is good idea, but if you want to go IIR way a simple biquad structure implements all kinds of filters (LP, HP, BP, BR, halving, etc), you can use calculator here to find out coefficients needed...
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      Every non-linearity introduces new harmonics. You should do Taylor series expansion to see what is the amplitude of components generated. For example single sine gets expanded to sin(x) = x − x^3/3! + x^5/5! − x^7/7! + · · · Each power component...
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