A lot of entries in Wiktionary have "rfap" tag, which is a request for the audio file.

Currently, users need to find an external tool to record such audio, then upload them one by one, which can be a hassle, requires multiple steps, and causes variability in audio quality.

Html5 now allows to record audio (see https://www.html5rocks.com/en/tutorials/getusermedia/intro)
There are JavaScript libraries allowing to do this, ex. https://github.com/higuma/web-audio-recorder-js

On wiktionary, please add a button allowing to record audio samples for particular words, and automatically upload them to mediawiki where such audios are normally stored.