Problem with butter worth filter

[TomTomTomTomTom]

Hello!

I want to filter audio signal from WAV with butter worth filter, but it doesn´t work.

I read context help and there is that i have to set freq parametres in hertz. I did it. Do you know where is the problem?

[GerdW]

Hi 5times Tom,

you seem to have continued this VI from your older thread…

Could you attach your VI and your sound file?

[TomTomTomTomTom]

I want to try another aproach with this new script :).

[TomTomTomTomTom]

I think that I have found solution!

I have to use 'Index Array.vi' before my data enters IIR filter. Index Array will select channel for me.

But I have another question! 🙂

When I display my filtered data the X axis (time) change its range, why?

[Henrik_Volkers · Accepted solution]

One important topic for all programming is DATATYPES!

Next: Read the tutorials and have a look at the examples  about the graphs and how to feed them with data.

You used the same waveform graph, but wired data of different type (and color)  and the graph icon in the BD changed color 😮

The waveform datatype already contains the samplerate (dt) information, but your array does not.