Need preset EQ

[ildarion]

Hey ! I'm usually listening my music with an "ROCK" equalizer, a curve like this :



But, it's really hard to set manually an EQ on rockbox (so many settings that I don't have a clue about what they do). So I have download this EQ preset : http://forums.rockbox.org/index.php/topic,34188.msg197369.html#msg197369  It's better than nothing, but don't really what I want. Anybody use a "rock" eq and can share with me ?

Thanx.

[[Saint]]

Shortly after I bumped the EQ band limit to 10, from 5, I submitted this patch.

The "Rock" EQ preset contained therein is in fact exactly what you want. It matches the curve in the image you provided exactly (there's a reason for this...I errr, "borrowed" them from some folks in Cupertino).

In some respects however it is also exactly what you don't want.

This was never accepted, and my viewpoint on the subject changed dramatically. I wouldn't want this patch to be committed into the source as it is, and as you can see we actually ended up removing all the EQ presets in the end.

Here's the thing. Its woefully inefficient to drive all the bands on a fully parametric EQ like I was doing here. The curve in your example could probably be done using a single band with a wide q, perhaps two bands at the most, meaning that in theory you're doing the extra calculation overhead for 8 more bands that you don't really need. The cost in CPU time for such calculations is non-trivial.

It is of course possible that some situations may require all 10 bands, for instance flattening out IEMs to a very high degree of precision (one of the particular use cases I had in mind when upping the band limit from 5 to 10), but for this particular use case driving all 10 bands for such a simple curve is absolute overkill.

I wasn't aware of exactly how wildly inefficient driving all 10 bands using a fully parametric EQ as a "dumb" EQ really was at the time.

The intention was, after I took myself to school on the way a full parametric EQ functions, that I would modify these presets so that they used the least amount of bands possible but I never actually got around to doing so, and up until reading this post of yours I had forgotten about it completely.

There's a chance that I will get around to doing so, and then presets may quite possibly be accepted back into the source, but my attention is rather divided at the present point in time. You don't mention what device(s?) you have, so I can't tell you for sure whether or not your device will definitely be able to drive all ten bands and still maintain realtime playback, but with the prior statement on inefficiency in mind, please feel free to try if you want to.


[Saint]

[ildarion]

I use a sansa clip zip and I'm in no hurry

[[Saint]]

If you would like you can pull the presets from that patch directly (I put a direct link to the "Rock" preset in my prior reply).

Gerrit will automagically package the file into a zip for you, and you can then dump the config file contained therein on your device and use it as you please.

This will get you up and rockin' *right now* if you'd like, as I can't make any promises on a time frame as to if or when I'll ever get the presets re-worked or even if they would be accepted after I did so.


[Saint]