interpolation method used for myRIO 1900

[charansai]

Hello there,

I have a quick question!

The DAC in myRIO 1900 uses what kind of interpolation method ? Is it linear interpolation ??

I have checked User guide of myRIO 1900 coud not find any details regarding the methods?

I am doing Active Noise Cancellation in real time Project, where for a sinusoidal wave for each cycle with 30 samples, I could be able to produce a perfect wave form but the sound that it is producing through Loud speaker is little abnormal !

There could be other reasons also but I kind of struck with this point.

Thank You.

[Jacobson-ni]

Are you using the audio out of the myRIO or just a standard analog output? Attaching your code would clear a lot up but I am not exactly sure what you are trying to do.

Depending on what you are trying to accomplish you might need to use the FPGA as RT isn't very reliable with loop rates over a couple of kHz.

[charansai]

I am using AUdio Out of myRIO . And here is what I am doing

FXP LMS e sub VI will take input signal x, error signal e and gives estimated signal Y_hat. This works in 1 SCTL (25nsec). Loop time for this code is 16 micro seconds, If I use pipeline for Audio OUT, I am getting around 11 micro seconds .

Thank you.