Rockbox General > Rockbox General Discussion

Setting limit volume on rockbox?

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Karamelo:
It's been clear that there's no consensus so far on that particular feature request.

Yet, I think this is quite simply a *must-have*.

A couple of days ago, I've had a bad (and painful) experience while doing something apparently innocent: testing a few themes on my Cowon. As I was loading a new one, the volume suddenly jumped through the roof (for some reason, that theme contained a line "volume: 0").

Just to put things in perspective, my player's volume is usually around -60dB... You get the picture.

Anyway let alone my own misadventure, I principally disagree with Llorean about the "not turning up" solution: being portable players whose whole point is to follow the owner into the most diverse activities, there are inevitably inumerous situations where your volume control can get pressed accidentaly just when you can't get to it (and the "hold" button is no guarantee).

So, considering it as a "safety feature" with a negligible footprint, I think it should definitely be taken into account...

Llorean:
Why not use the equalizer precut then?

Assuming the hold switch can accidentally get turned off, and the volume button can accidentally get held long enough to raise the volume to damage your hearing before your earphones can come off, and before you can stop it, the equalizer and the volume cannot be adjusted simultaneously no matter what.

Meanwhile, it such a feature would _not_ do anything about bad themes: A theme could just as easily accidentally disable maximum volume as it could change it, anyway.

Kay:
To put this in another light, let's say there are two main volume settings I wish to use on my rockboxed MP3 player, (1) a low volume setting for headphones and (2) a high volume setting for attachment to an amplifier such as a car or home stereo through a cord.

I don't particularly care whether I have to increase the volume to get to the optimum setting for setting 2, but I do care very much if I have accidentally left setting 2 on when I wish to listen with headphones. And I don't want to sacrifice any sound quality if possible.

Is there a temporary way of increasing the volume range in order to achieve setting 2, but have it revert back to setting 1 the next time I start up the player?

I'm concerned about a youngster using my player, after I have adjusted it for playing through an amplifier. I'm also concerned about a youngster not having enough care or sense to keep the volume down. You may say, a person that young or headphone-inexperienced shouldn't have this type of sound device, but it's a common application. And the warnings on the Sansa manual I have state: "Your hearing may adapt to higher volumes of sound," leading to ever-increasing volumes. The Sansa comes with a normal and high volume setting (I assume that's a shift in upper range.)

That said, if there is not an easy way to do what is proposed, then a volume limiter override would be very nice. I assume that the precut or relay gain methods keep their settings after the unit is turned off, effectively just another volume control that can be accidentally set too high.

Llorean:
Again, use the equalizer precut... If you put Precut settings in a file, fixed.cfg, in your .rockbox folder, they'll be re-loaded each boot. To temporarily disabled it, you just turn off the equalizer. Next time you reboot the player, the precut will once again be limiting your max effective volume.

Kay:
With all due respect, doesn't setting the Precut high to reduce volume affect sound quality negatively? It seemed to when I tried.

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