3.13 eq.cfg and sound.cfg headup

[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.

# .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

[soap]

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

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

[[Saint]]

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

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]

[Crafty]

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.

The old 5-band EQ.cfg does config the first 5 bands of the new 10 band EQ.  However, the point I was making was the last 5 bands will maintain it's "left-over" settings.  Deal with it or don't deal with it...I was just making a heads up call.

[[Saint]]

[The old 5-band EQ.cfg does config the first 5 bands of the new 10 band EQ.  However, the point I was making was the last 5 bands will maintain it's "left-over" settings.  Deal with it or don't deal with it...I was just making a heads up call.

This would only matter if you had loaded a 10 band EQ preset prior to loading a 5 band EQ preset. Otherwise, the additional 5 bands would have 0 gain and would be dismissed. I suspect that is what happened here? Otherwise it is nothing to worry about. The frequency and q of the "extra" 5 bands would remain, but as the gain would be 0 these bands would not be applied.

If a user continued to use their own custom 5 band EQ presets without ever loading one of the updated built-in 10 band presets, they would never notice any difference at all and the EQ would continue to behave exactly as they expect it should. If however the user was to mix and match, changing between 5 band EQ presets from before the change and updated 10 band EQ presets, then yes "weird things" will happen.

My advice for users in this situation that want to keep the 5 band EQ functionality of their custom presets would be to load the default/flat EQ to ensure that all bands are set to zero gain, and the frequency stepping and q values are as expected, load their custom 5 band preset, and then re-save the preset. This will ensure that the new preset .cfg is saved with the expected values from their 5 band preset as well as saving the values for the unused bands. The result of this being the ability to seamlessly switch between the built-in 10 band presets and their own custom 5 band presets.


[Saint]

[Crafty]

nice post.  maybe it needs some sticky glue.

wow, I was getting two doses of augmentation.  "weird" gain was at +120 or ~180 at 4khz. 
eq peak filter 3: 4000, 10, 80
eq peak filter 7: 4000, 10, 40