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Rockbox mail archiveSubject: Sound quality testSound quality test
From: Linus Nielsen Feltzing <linus_at_haxx.se>
Date: Mon, 22 Mar 2004 13:31:36 +0100 Hey all! There is a discussion going on about the sound quality being worse with Rockbox than with the original firmware. Some people claim that the Rockbox stereo separation is "too wide, with too little punch". I have created a debug screen called "Sound test" where you can tweak the stereo separation. It can be found in the debug menu, as usual. Instructions: The debug screen shows the channel mix. LL tells you how much of the channel is mixed into the ear, LR is how much of the channel is mixed into the other ear. Don't mind that the numbers are negative. LL and LR are the values for the left ear, there are also the RR and RL settings, but they are set to the same values. See the MAS data sheet for details. Left ear = left * LL + right * RL Right ear = right * RR + left * LR This means that (-0.50, -0.50) gives a mono signal, (-1.00, -0.00) gives you true stereo separation, and (-0.00, -1.00) reverses the channels. LEFT decreases the LL (and RR) level RIGHT increases the LL (and RR) level PLAY lets you compare with the true stereo separation. To hear your setting again, press PLAY again, or alter the LL value. I want you audiophiles to try to find the combination that gives you the "best" sound. Also try to find the combination that sounds like the original firmware. Thanks, Linus _______________________________________________ http://cool.haxx.se/mailman/listinfo/rockbox Received on 2004-03-22 Page template was last modified "Tue Sep 7 00:00:02 2021" The Rockbox Crew -- Privacy Policy |