What are the best settings to go for when playing back MP3s, watching internet videos and the occasional DVD on the Laptop. I am using a Dell Inspiron 1545 Laptop with a pair of M-Audio Studiophile AV 40 speakers connected via the 3.5 headphone socket of my laptop to the phono L+R line in socket on the speakers. There is 16-bit and 24-bit options along with their Hz setting in the Windows Speaker section. Which is the best bang for buck in terms of performance that will not impact audio quality. I have heard that selecting setting other than the source will result in up-sampling or down-sampling which will cause extra processing and hence result in quality loss, is this true or just a load of bull?