What is meant by Excite Node / Data mentioned in the Duplex Effect Example.

[cdigit]

I don't know anything about DSP, but my guess is that these are DSP terms. Intuitively it sounds like something that's going to enhance or change the data it's applied to. I can see what's going on in the code (I don't know anything about C either), but would like a more formal idea or link to some source explaining excite to get a bigger picture understanding. Search engines aren't returning any useful results for "excite node" or "excite data".

[orcmid]

@cdigit

... Search engines aren't returning any useful results for "excite node" or "excite data".

Try "excite audio" and it does seem related to signal processing.

[cdigit]

Thanks, I was able to find some things from modifying the search terms like you specified:
I found this answer, which was helpful: https://www.quora.com/What-is-excitation-of-audio-signal/log

Then searched for "excitation audio" and found this one:
https://dspguide.com/ch1/3.htm

Google's search results seems to have gotten much worse over the years. Had to use some other search engines.

[mackron]

It's related to the vocoder effect. It requires two streams of input data - one is the the excite/modulator and the other is the source/carrier. For the effect to work there needs to be some nodes wired up to route the inputs into the effect, hence what those nodes are for.

[cdigit]

Yes! I saw those 2 nodes going into the vocoder node in the example code.