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fpga- microphone value

Hello, i am a labview and fpga beginner.

 

I made a code which supposes to make speaker to produce sine wave sound and microphone to record the sine wave in time difference.

 

The speaker works well. It gives sound and front panel gives proper -3 to 3 amplitude sine wave,

 

but I found microphone gives same amount output whether the speaker is turned on or off.

 

So i think the microphone is not working well and just giving me very small noise. (0 to 0.00003 amplitude)

 

Plus, when i add waveform chart to see what is happening clearly, it gives error that says "Front panel terminal 'waveform chart', type not supported in current target

 

mod0 is connected to microphone and mod1 is connected to speaker.

 

Summary:

1. microphone is not working well.

2. how can i add waveform chart to here.

 

(i havent finished to read manual 1 and 2 yet, so I might missing something in code)

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