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Rockbox mail archiveSubject: RE: Optimum Audio LevelsRE: Optimum Audio Levels
From: Matt Evans <mge_at_blueyonder.co.uk>
Date: Thu, 3 Jun 2004 10:12:27 +0100 Sorry to contribute late. Headphones as low as 45% when going to sleep. (I couldn't use the original Archos at all for this purpose because the volume didn't go low enough!!). Matt -----Original Message----- From: rockbox-bounces_at_cool.haxx.se [mailto:rockbox-bounces_at_cool.haxx.se] On Behalf Of Benjamin Betts Sent: 03 June 2004 02:27 To: Rockbox development Subject: Re: Optimum Audio Levels Headphones: 60 - 70 % Car and Stereo: 85% - 95% Benjamin Betts bmbetts_at_mail.uophx.edu benbetts_at_charter.net BlueChip wrote: > Hey all, > > I need to do a little survey to optimise the new Audio Interface... > > One question :) > > ============================================ > What is the VOLUME range you use most often? > ============================================ > > ...If you use, say, one volume in the car, and another in bed at night. > Feel free to give two answers. > > Personally I use: > 85-95% in walkman mode > 65-75% in bed > 92% in the car > > > > > Skip to the "P.S." section now! > ...unless you want all the techies-only stuff. > > > > > The volume scale inside the unit is measured in dB on the scale {MUTE, > -114, -113, ..., -2, 1, 0, +1, +2, ..., +11, +12} Where 0dB is > designed to produce "Line Level" > > These values are numbered {0x00, ..., 0x7F} respectively Such that > {0=Mute, 1=-115dB, ..., 0x73=0dB, ..., 0x7F=+12dB} > > The Rockbox volume scale is a linear transpose of the MAS scale. > That is: Actual_Volume = Rockbox_Volume*0x7F/100 > > ...which interestingly enough means there is no Rockbox setting for > line level and you do not have fine control where required. > > I have a non-linear scaling algorithm which allows greater control in > the most used volume ranges at the cost of less control in the unused > volume ranges. > > At Rockbox=60%, you are down to 0x4C which is -39dB > > I currently have FULL control over -18..+12dB but I think others, > particularly the audiophiles, may require accurate control at lower > levels. > > B > l > u > BlueChip > C > h > i > p > > PS. Good news: I just found the MAS registers to turn your Jukebox > into a mixer and/or karaoke machine - so your jukebox can remove the > old vocals and add your in place, live and with a simple mixer :) > > There's even an option for "3.0" sound if anyone is interested in even > more volume - lol > > _______________________________________________ > http://cool.haxx.se/mailman/listinfo/rockbox > _______________________________________________ http://cool.haxx.se/mailman/listinfo/rockbox _______________________________________________ http://cool.haxx.se/mailman/listinfo/rockbox Received on 2004-06-03 Page template was last modified "Tue Sep 7 00:00:02 2021" The Rockbox Crew -- Privacy Policy |