# Known limitations¶

• Sometimes problems can occur due to known FFT features such as folding and aliasing.

Todo

Erik, please check this out and rewrite.

• I am not sure how filon integration works and deals with these problem but be aware that dynasor does not obey Nyquist criterion and you should probably only look at frequencies lower than $$\frac{\omega_{max}}{2}$$.
• One should take the absolute value of the frequency functions since FFT amplitudes can sometimes become negative.
• Only constant volume trajectories are supported.