Oversampling/Anti-Aliasing

[PhilRanger]

Hello,

I would like to add to add oversampling/anti aliasing to one of my jsfx plugins. Apart from Stillwell's "Bad BussMojo Waveshaper w/AA", which uses a simple 2nd order low pass pre- and post-filter, are there any resources that could help me to get a better performance at a reasonable CPU load?

I could extrapolate from Liteon's "Chebyshev 4-Pole Filter" and/or put several low-pass filters, but would like some advice.

Would an FFT - convolve - IFFT slow things down a lot compared to IIR filters? What about a FIR?

Thanks!

[Tale]

I have a FIR based 2x oversampler JSFX library (oversample.jsfx-inc) in my JSFX pack, which I use in my tube_amp JSFX plugin.

BTW, you could also use FX instance oversampling, and let REAPER handle it.

[PhilRanger]

Thank you very much for both of your answers!

I'm in 6.12 so I don't have this option and didn't know about it (I'll update when I get authorization, it is a "company laptop" with a lot of safety freak measures).

It could be nice to trigger it by changing a variable inside the plugin, so each plugin programmer could decide to do it or not, or even offer it on a slider.

I'm also wondering: if there are several non-linear stages, I think it would need low-pass filtering between each of those stages as well, isn't it?