Challenge 3: Why Both OBS's Live Filters and Audacity's Noise Reduction Are Worth Using — Solution Walkthrough

Why both are still worth using together:

Per this chapter's own tip box, OBS's own Noise Gate and Noise
Suppression are live, real-time filters applied during the actual
recording or streaming itself, while Audacity's own Noise Reduction
effect works differently — analyzing a sampled noise profile from an
already-recorded file and removing it after the fact, in post-
production. These are two genuinely different tools solving a
similar-sounding problem at two different stages of the overall
production process, not two competing solutions to the identical
problem.

What OBS's own live filters accomplish that post-production alone
doesn't:

Cleaning up noise live, during capture, means the recorded file itself
already starts from a cleaner baseline — reducing how much noise-
removal work is even needed afterward, and avoiding a situation where
excessively noisy raw audio makes post-production noise reduction
itself have to work harder (often at a greater cost to voice quality)
to compensate.

What post-production noise reduction still adds on top:

Even after cleanup during live capture, Audacity's own Noise Reduction
effect can catch anything OBS's own live filters didn't fully remove,
applied with the benefit of being able to listen to and adjust the
entire finished recording at once, rather than reacting to audio in
real time during a live session.

Why treating them as redundant would be a mistake:

Skipping OBS's own live filters under the assumption that post-
production will "handle it anyway" means starting the post-production
step from noisier raw material than necessary — the two tools are
complementary steps in one overall production pipeline, not
interchangeable alternatives to each other.

WHY THIS WORKS AS AN ANSWER
------------------------------
This exercise directly applies this chapter's own tip box to a
realistic question about whether live filtering is worth bothering
with at all, correctly explaining why using both together produces a
better result than relying on either stage alone.