Well, yes, technically, but usually not enough to notice. But I do not have such problems at all with this
youtube to mp3? converter. Just two simple steps to get your mp3 from YouTube. Copy-paste the URL of the video, click the “Convert” button. Flv2mp3 has a wide range of alternative formats to choose from: WMA lossy, Apple's AAC for Mac, DivX, mp3, and many more. I simply adore it