Avoiding aliasing

[silveiraGo]

So, what are, or is there a way to avoid or decrease aliasing or Teensy 3.2? Please let me know if any of them would work.
- Putting a lowpass after after the wave form. (I already tried with "filter" but doesn't work, so maybe with biquad?)
- Increasing the sample rate to a point that the folding back would be barely noticeable, because of the higher Nyquist.
- Using different wavetables with band limited waveforms, maybe one per octave.

Probably the last is the most efficient, but will require some work. So if anyone can point ready to go band limited wave tables, it would be awesome! Otherwise, I'll try to do it.

Thanks!

 

[hyperdyne]

Actually #2 is your best bet, since the only way to easily mitigate aliasing is by 1) changing the bandwidth of the upfront analog anti-aliasing filter, or 2) increasing the sample rate if you cant change out the filter so aliasing is pushed farther out.

Anything you do digitally after the signal is sampled won't work, since the aliasing has already happened.

 

[silveiraGo]

Do you know how can I do that?