Avrin Posted August 21, 2009 Report Share Posted August 21, 2009 (edited) As it turns out, the crippled MP3 playback "feature" of second-generation Hi-MD units was not created out of thin air. The transformation applied to the signal is not just an arbitrary decrease of higher frequencies. It exactly coincides with the de-emphasis curve provided by the Red Book Standard for audio CDs. And the pre-emphasis/de-emphasis feature, when used properly, can actually increase sound quality by lowering quantization noise in the higher frequency range (which is most affected by it) by 10 dB.Green - white noise with the de-emphasis transformation applied (using SonicStage).Red - an MP3 of pure (flat) white noise played back on the RH10.A practical use for the improperly implemented function follows immediately: if you have a pre-emphasized CD (the first pressing of Pink Floyd's "The Wall" is the most famous example), rip it by a non-deemphasizing program (i.e., not SonicStage or iTunes), compress to MP3 and enjoy perfect sound on a second-generation Hi-MD unit! Edited August 21, 2009 by Avrin Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.