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Rockbox mail archiveSubject: Re: [patch] volume peak meter in wpsRe: [patch] volume peak meter in wps
From: Jack Peel <jhp_at_cypress.com>
Date: Tue, 17 Sep 2002 15:10:10 -0700 Hmm.. I'm not sure who would actually use linear meters, as they don't tell you nearly as much as the dB meters. Although some people might like the way it "looks" (you know the guys with neon lights under their cars ;) But I don't think it would hurt anything to have them as an option :) As far as the scale. I was also thinking about the fonts being a problem. A solution I was thinking about would be to put hash marks on the meters themselves (like between the l/r meters, or on the edges. Then let the user put numbers by them with the custom wps screen if they want them. The hash marks just need to be documented so that we know which meter is which. Another thing to think about as far as the scaling of the meters is that usually meters have more resolution as you get closer to 0 dB. I'm not sure how to put this into words, but I can certainly put it into pictures. The point that I'm trying to make is that the scale is usually not linear. It might just come out that way when you do take the logarithm of the data, but I'm not sure. So my thought is to make them look like -40 -20 -10 -6 -3 -2 -1 0 This might require you to "shape" the data coming into the display portion of the code. If you have to do this it probably isn't worth it. But it would make it look more "pro" :) Also I notice that when I play my "clipping" mp3 the peak hold bars disappear (I assume they are just going off the end) It would be good if you could turn them into clip icons and have them hold longer. For the recording end it might be nice to have an option for the peak hold bars to hold until cleared kind of thing so that we can see what the peek value is of the recording. You could probably implement this now or later. It doesn't really matter for playback. Jack Philipp Pertermann wrote: > Jack wrote: > > > Now here is a question. What is the scale ? It almost > looks like > > a linear scale vs. a log (dB) scale. Do the meters go all > the way to > > the right edge of the screen ? > > Yes, it's linear. I've already gotten some links to learn > how to do the dbfs math. I'm working on that. I have to make > some conversion tables. It will be a user selectable option > to switch from linear to dbfs. > > > Could you add a scale as an option in the WPS screen, like > > if you put %pms on the line above it put marks with their > dB values, > > like -10 -6 -3 -1 and so on ? > > I consider that as problematic with loadable fonts. But what > I could do is put in some inverted vertical lines at magic > values. And a few new tags to read out the peak values as > numerical values > > > Also could you put "clip" "lights" on it so that if the > MP3 goes > > to full scale it shows a different symbol and it hangs out > longer > > so that we know if the MP3 itself is clipping ? > > Yes, I could. > > > In conclusion Good Job! > > Thanx! Your input is highly appreciated. > > Phil Received on 2002-09-18 Page template was last modified "Tue Sep 7 00:00:02 2021" The Rockbox Crew -- Privacy Policy |