I start by going to eLearning Learning and then I search for something like audio which gets me quickly to a page that's a bunch of great posts and other items all about Audio in eLearning. The keywords on the left are highly related to audio as well, so I'll drill down to pages on Audio Voiceover or Audio Microphone. On the Audio Microphone page I scroll down to the Best of Posts and see a bunch of great posts:
- Microphone Round-up!
- Audio quality does matter
- 4 Simple Tips for Recording High-Quality Audio
- Microphone Review: Marshall MXL Studio 1 USB, USB.008, and USB.009
- More USB Microphone Reviews
- Better Late Than Never: Shure USB Microphones