Is there another way to pass the numbers from [rfft~] to an array without using [tabwrite~]? I find [tabwrite~] makes the spectrum unstable (maybe something to do with the relationship between the number of bangs and the sampling frequency ... or maybe something else.)

@MDobleZ do you mean [tabsend~]?

No, @seb-harmonik.ar, I was using [tabwrite~] with the name of the array; but I assuming it will be the same thing. I know that with [pb~]s you can add a message and write the array index you want with no need for bangs (none triggered by the user at least), and I was wondering if that was somehow possible with the [rfft~] object.

@MDobleZ it is unclear what you are trying to do. There is no [pb~] object in neither vanilla nor extended (that I know of).

For continuous reading/writing from/to an array (FFT bins or other) no bangs needed, [tabreceive~] and [tabsend~] are your friends. Look at the FFT examples in the help browser to see how it is done, or read up on FFT ops here: http://www.pd-tutorial.com/english/ch03s08.html

Sorry, @bocanegra, I meant [bp~]. I'll try what you suggest. Thanks.

I'm sure there is something I'm doing wrong but this takes a whole second to refresh.

Yes because the graphics are told to update with every DSP block. Try something like this instead:

Thanks, @bocanegra, I'll give that a try.