I had a similar experience, and for a few minutes I thought the demo was buggy. The original sound sounds like "yanni" to me, but if I moved it to "laurel" and

I had a similar experience, and for a few minutes I thought the demo was buggy. The original sound sounds like "yanni" to me, but if I moved it to "laurel" and back to the middle, the middle sound would sound like "laurel" as well. At first, the only way I could get it to stop astounding like "laurel" was to pause it for a few seconds. After this happened a few times I realized it wasn't a bug, but that I was somehow subconsciously adjusting which party of the sound I was paying attending to, and then I was able to shift my attention to whichever I wanted.