This digital audio converter is marketed as a high-quality and inexpensive way to digitize old cassettes and LPs. I’m sure it’s excellent for those tasks, too, but I’ve found it particularly useful for making audio recordings on a laptop without a pro-tools budget.
Basically, it’s a less noisy way of taking sound from a mic and recording it onto a computer. Recording on an 1/8-inch-line input can be pretty noisy, especially on a laptop. This converter cuts out much of the noise, and makes a usable recording. I recently recorded some narration for a voiceover on a video I’m putting together, and it works pretty well. It’s also USB-powered, so no need for batteries or an AC power cord. There are more expensive versions that do a slightly better job, but I find this product does a great job for the money.