I'm gathering some data about our ability to tell lossless and lossy apart just using our ears (and a good pair of cans, of course). Help me by taking one (or both) of these tests. Have fun.
CD vs AAC 256k: https://adobeformscentral.com/?f=o1djSe8NA6yyMZDoE65QCQ
HD vs AAC 256k: https://adobeformscentral.com/?f=Kqaz0qdATMgaw-Mz6SQp*Q