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MCU控制ADAU1701 EQ 核心问题

SigmaDSP & SigmaStudio DavidHuang Nov 29, 2018 00:00 1 replies Original on forum ↗
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DavidHuang Question
Nov 29, 2018 00:00

8461.SigmalStudio.zip

多谢你的指教，我问题的核心是：上图所示，我把gain一改成10，就对应出来5个浮点数，那么我其实在实际产品是用上位机通过MCU去控制Gain的，那问题在于，我要把gain=10的指令发给MCU,MCU是通过什么样的算法，把10转化成那5个浮点数的呢？

谢谢指教

Edit Notes
多谢你的指教，我问题的核心是：上图所示，我把gain一改成10，就对应出来5个浮点数，那么我其实在实际产品是用上位机通过MCU去控制Gain的，那问题在于，我要把gain=10的指令发给MCU,MCU是通过什么样的算法，把10转化成那5个浮点数的呢？

谢谢指教

[edited by: DavidHuang at 4:53 AM (GMT -5) on 30 Nov 2018]

3(B0D`SIHTJ}CT@R[W{737L.png
3(B0D`SIHTJ}CT@R[W{737L.png
8461.SigmalStudio.zip12.7 KB
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ADIApproved Reply
Nov 29, 2018 00:00

yes, you need to write all 5 parameters. The value that you see is a gain applied to the filter but since the filter has a boost of zero dB. Only the first parameters of the biquad coefficient is used (with a gain of 4dB)

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