Spacing between gaussian windows for STFT I'm computing discrete short time Fourier transform. Data is split into overlapping chunks and gaussian window is used for each chunk. However, I'm not sure how much overlap there should be between chunks.

If they are too sparce I will loose information between them (gaussian window for each chunks is shown here):



On the other side, pack them to densely and I will do a lot of redundant computations:



Something in between is necessary:



But what exactly should it be?
usually the overlap has more clear meaning when used with a complementary window such as the Hann window.  a complementary window is such that the tails of all overlapping window functions add to 1.  $$ \sum\limits_{k=-\infty}^{+\infty} w(t-kT_{\text{hop}}) \ = \ 1$$  that cannot be the case for overlapping gaussian window functions.

if your STFT is just for analysis, not synthesis or reconstruction, then complementary windows do not usually matter.  then the issue is more about frequency resolution (which determines how wide the window is) and the STFT frame hop distance.