First, yes, I did A/B comparisons with a couple long-time favorite music tracks, which I encoded several different ways. I could not always detect differences, but sometimes I could. That was enough for me. Second, I do not use the "audio circuitry" in the Airport Express. Instead, I use its optical interface to send a digital bit stream (44.1K samples/sec. I believe) directly to my (high-end) A/V receiver. The actual digital to analog conversion happens there. As I mentioned earlier, this approach keeps my music completely digital from the original CD source material, through the Airport Express, and into my A/V receiver - the most expensive component in my system (the G5 aside!). But suppose I had a different setup, and was listening to my music through a fairly lo-fi audio system. I believe that ripping a bunch of CDs isn't something I want to do again in a year or three, when I might invest in a better system that discloses issues in the lossy encoding that I chose based on my listening tests today. If I can afford the additional disk space to support Apple Lossless Encoding, it's a bit like saving my digital photos in RAW format. I have the best information possible, in order to take advantage of better technology as it arrives. Enjoy! -- Jim On 2005-08-14 3:23 AM, "B. Kuestner" <kuestner at macnews.de> wrote: > Before digging into super-fidelity technical details ... did anybody > ever care to make a listening test if the audible difference after > using a lossy encoder is even perceivable to your ears, and if so, is > this difference relevant to you? > > I read about Airport Express here which uses (sorry to break the bad > news) sub-par audio circuitry. Now if the Airport Express is good > enough for you, then most likely AAC or MP3 (VBR) both at 160 kbit/s > and encoded at "highest quality" should be more than plenty. > > Just a thought before you start filling up your hard drives for a > mostly psychological phenomenon. > > Note: I'm not implying that there is no perceivable difference and > that it isn't relevant for some. But AAC and MP3 are successful for a > good reason, because they really do a good job for a large majority > of the listening habits out there ... which should include all AE > users. (c: