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3.13 eq.cfg and sound.cfg headup

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Crafty:
My old 3.12 eq.cfg files didn't work so good on the 3.13 new 10 band eq.  It had no effect on the 5 high freq.  I did a manual (one step: unzip) update.

The default "Q" is at 7/10,...,10/7, the same as the old 5 band eq.  Does that mean there is more overlap between freqs with the 10 band eq?   Seems to improve highs and low freqs.   

[Saint]:
Actually, though it may be non-obvious, your old 5 band EQ presets will behave exactly the same as they did prior to the inclusion of the additional 5 bands. It isn't favouring the lows nor missing the highs with a 5 band preset loaded in the 10 band EQ, the first 5 bands are set exactly as they should be, and the remaining 5 bands simply remain unused.

The EQ presets don't just set the gain and precut, they also do Q and frequency response, so applying a 5 band EQ preset on the 10 band EQ will set it up exactly as it was before the change.

If you want to convert your presets from 5 bands to 10, an easy way to do this is to simply double the bands. So, for example, if your 5 band EQ preset is:

+5, +2, 0, +2, +5

You would change it to:

+5, +5, +2, +2, 0, 0, +2, +2, +5, +5

It is important to not that this is by no means an exact conversion, but it is a relatively easy way of reproducing a similar curve. You can then adjust it further whilst listening to a familiar piece of audio (something you know how it should sound) if you need to.


[Saint]

Crafty:
Thanks, I think I got it.  It looks like my conversions are good. 500hz and 1k share the same value as old 800hz.  Main thing is to start with a new 10 band preset to get the f&q's right.

So you guys rig it where it does not use filter 5,6,7,8.


--- Quote ---# .cfg file created by rockbox 3.13 - http://www.rockbox.org

eq enabled: on
eq precut: 0
eq low shelf filter: 60, 7, 120
eq peak filter 1: 200, 10, 80
eq peak filter 2: 800, 10, 0
eq peak filter 3: 4000, 10, 80
eq peak filter 4: 12000, 7, 90
eq peak filter 5: 1000, 10, 40
eq peak filter 6: 2000, 10, 40
eq peak filter 7: 4000, 10, 40
eq peak filter 8: 8000, 10, 40
eq high shelf filter: 16000, 7, 40
--- End quote ---

soap:

--- Quote from: [Saint] on March 08, 2013, 05:17:54 PM ---If you want to convert your presets from 5 bands to 10, an easy way to do this is to simply double the bands. So, for example, if your 5 band EQ preset is:

+5, +2, 0, +2, +5

You would change it to:

+5, +5, +2, +2, 0, 0, +2, +2, +5, +5

--- End quote ---

How many players will not see a battery life decrease from doubling the amount of EQ math done w/o reason?

[Saint]:

--- Quote from: soap on March 09, 2013, 08:44:23 AM ---How many players will not see a battery life decrease from doubling the amount of EQ math done w/o reason?

--- End quote ---

None. But...I rather suspect you are aware of this, so your question confuses me greatly.

Of course using more bands is going to equate to more battery consumption (though I would be quite surprised if it made a difference in runtime that a user would actually notice without measurement...but, anyway). All I was doing was showing OP a way that he could trivially replicate a similar EQ curve in the 10 band EQ because the fact that "old" 5-band presets weren't using all 10 bands seemed to confuse OP.

I don't recall saying anywhere that there was any reason to do so, and I explicitly stated that 5-band EQs will continue to work exactly as they did prior to the inclusion of the additional 5 bands.


[Saint]

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