Rockbox Development > Feature Ideas

More advanced EQ - (Adjustable 10 Band, Pre-Amp ++)

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Inocybe:
4. I have: "It will also optimize the headroom, by adding gain before the EQ.". Normally, in an digital EQ, there is headroom to spare. This to have room for EQ settings. If EQ is flat, or especially if you reduce lower frequences, you could add Pre-Amp gain in many cases. This is not the same as using the master volume. Optimizing headroom will create better sound quality. The goal is to get as close to 0 db as possible, but without clipping. It will also play louder. This is why many new records are mastered higher than the clipping level, to get it as loud as possible (bad practise). The master volume (Rockbox) is then controlling this sound level.

5. That is the point of a live db meter. Often they show the peaks longer so it's easier to follow. And yes, it would be different from song to song. But, it would show you the headroom in a clear way. for example, if most (all of the songs) is way below the 0 db limit, you could add som gain and still see that there is some room left. Or, if 90% of the songs is way below the clipping point and 10% really peaks, you could add some gain so that the 10% have clipping issues, but the rest of the songs will have higher volume. If it was useless, why would 99% of all professional sequencers have it? No, it's far from useless if it's used coreectly.

6. Understand what you are saying

isanggon,

What I understand is that some players have two CPU's (one audio and one video). Rockbox can only use the smaller one, and therefore there could be some performance problems. Those players with only one CPU (like some iPods), seem to perform better with Rockbox. Please correct me if I'm wrong. I have read the video performance chart.

soap:
Only the iPod Video has a dedicated video decoder.  Outside that all the iPods (and sansas) have (basically) the same CPU (a dual-core ARM7).
The differences you see in video decoding performance is mostly inversely proportional to screen size - less pixels to decode = faster speed.

Febs:
How is #5 different from the existing peak meter?

Inocybe:

--- Quote from: Febs on March 05, 2009, 04:42:31 PM ---How is #5 different from the existing peak meter?

--- End quote ---
Please note that I don't know the inner workings of Rockbox. If the peak meter can be placed in the EQ window (customized), then it propably would be the same. The thing is that it's very useful when adjusting the EQ. On the other hand, Rockbox has many other ways of adjusting the sound, and this would also effect the db output. So, just placing the peak meter after the EQ, may not be enough. The best thing would be to have it in every "effect" window (including a preamp adjuster).

Febs:
Thanks, but you did not actually answer my question.

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