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Rockbox mail archiveSubject: Re: mp3 featuresRe: mp3 features
From: LoveLearn <LoveLearn_at_iw.net>
Date: Wed, 10 Sep 2003 17:40:18 -0500 The current automatic volume alteration discussion raised questions. MusicMatch JukeBox includes a volume leveling option. Select which mp3 files to process. Processed files are replaced by slightly larger volume leveled copies. On MusicMatch playback formerly frustratingly quiet files seem normally loud. Is this processing equivelant or identical to the volume leveling proposed RockBox? MusicMatch volume leveling processing appears CPU intensive on PCs. Similar processing might be very slow on Archos hardware. I ran Peavey CS800 professional sound reinforcement amplifiers years ago which included a quick acting volume peak limiting option. When driving one of these 800 watt units to very high levels, audience members never heard these spike reductions nor did they hear the recovery period because it was so fast acting in both directions. When playing really loudly, switching off this spike limiting circuitry instantly revealed clearly recognizable clipping distortion while reducing apparent average sound pressure level. After we discovered those two perceived performance enhancements, we always left the spike reduction circuit switched on. I've played with RockBox "Auto Volume" spike limiting. I don't use it because its shortest recovery time is distressingly long and obvious to me. I've experienced volume spike limiting that functions so fast audience members can't perceive it's occurring. Would it be possible to duplicate that circuit's effects with RockBox software? Received on 2003-09-11 Page template was last modified "Tue Sep 7 00:00:02 2021" The Rockbox Crew -- Privacy Policy |