My question regards some of the audio compression codecs and the effects they have on physical audio reproduction and power consumption. Specifically, I am referring to the well known "lossy" codecs such as mp3, Ogg Vorbis, and MusePack. These codecs use algorithms designed around a psycoacoustic model to selectively remove portions of the audio signal which are not percievable to the listener.They also include trickeries that fool the listener into hearing things that dont really exist as explicit components of the compressed signal. In the end the ammount of information in the signal is reduced dramatically. OK, To the point My question is: 1) How does his affect the power consumption involved in amplifying the final output signal, which is to the listener indistinguishable from the original, but in reality has much less information/signal content? Less signal less power? 2)How does this affect the driver/speaker performance. Most speakers are much less accurate when they are driven by many frequencies simultaneously compared to when they are driven by fewer. Less information to reproduce = more accuracy? I'm thinking that if these two questions have answers that favor the information removal, more work can theoretically be focused on the most important job: repproducing the audio signals that matter most and removing the stagnant information that is bieng reproduced for no reason. ...Or does the codec add its own version of useless garbage? Could "lossy" compression actually improve real world performance? (Oh yea, im not worried about artifacts, assume the compression is transparent to the listener) Sorry for the mess. Thanks in advance.