请教下ADAU1401IIS输入时，原理图怎么选input pin 我按照datasheet 设置好后DAC没有输出，求大神指教
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As Lisa said, please post in English.
You are using MP0 pin as a GPIO. This pin is where SDATA_IN0 is located. So I think you are using SDATA_IN1. In that case the audio will appear on inputs 4 & 5 on the input GUI in SigmaStudio.
So next time also include your SigmaStudio project and a description of what you are doing with the part. That would be helpful.
DaveThib,think for your reply。I have change INPUT pin SDATA_IN0（I test LRCLK（48KHz）/BCLK （3.072MHz） all right），but I don't know how connect in the schematic with DAC0 OUT（it is also no output signal ）。
OK I got it ,think you ,Dave T.
Great, I am glad you have it working.
Can I comment on what I see in your project?
You have a Stimulus cell but no Probe. They work together. Also, the feature will only work through filters, it will not work through compressors and most other cells. It is designed to give you a visual curve of the filter before it is loaded into the DSP.
Here is a project I assembled to show this:
When you click on the Probe button you will have these windows pop up:
As you can see when I click on the left channel stimulus I get a response curve. When I click on the right channel I get nothing.
Now one other thing.
You should look at the Standard types of compressors. They have a really good visual interface. It looks like this:
When you turn on the level indicators you will see the audio level in the meters but you will also see the ball that shows where the level is in the compressor curve.
I have attached the project.
I think you are asking about why I only have one channel setup with a stimulus and probe? This is because it is a stereo filter and both channels will be exactly the same. No need to look at the transfer function of both filter channels.
Keep in mind that the Stimulus and Probe are similar to compiler directives, they do not produce any code that runs in the DSP. This function only happens on the computer that is running SigmaStudio. It looks at the DSP code and the filter settings and graphs out the transfer function. It is only a tool to see what the filter will reproduce. It is not looking at what is actually happening in the DSP.
The actual filter in the DSP could end up being different if you have the sample rate set improperly or do not clock the part properly.
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