This is a page for technical questions about the algorithms used in Audacity. If you have questions about how Audacity works, please post them here and the developers will answer them. Eventually we will get a lot more organised and have explanations of the audacity algorithms in Doxygen format, where they can be both in the source code for Audacity and on a web page like here.
Q: I'd like to know which resampling algorithm does audacity use. I`m studying resampling for my thesis and I`m testing Audacity resampler` influence on perceived audio quality..
A: Audacity uses the resampling algorithm from Julius Orion Smith's Resample project. Audacity also contains code to use libsamplerate, but we can't distribute librample with Audacity because of licensing issues.
See these discussions for more information on our choice of resampling algorithms:
Audacity Noise Removal
Q: How do you actually remove noise? What is the algorithm? What causes the 'tinkling' artefacts, and what steps can and have been taken to remove them?
See these links for more on noise removal: