Rockbox Development > Feature Ideas

Even more EQ bands are necessary for many users

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phr:
I had the impression at least at the start of this thread, that the OP didn't understand the difference between parametric eq (a few bands with variable center frequency and variable Q) and traditional eq (lots of fixed bands with fixed Q).  But I can't really tell.

It does seem to me that increasing bands would increase CPU load, maybe beyond what the CPU in a little player like the Sansa Clip is capable of, and also mess up the phase response at normal sample rates.  Maybe it could work better with 96 khz sampling if the source material and cpu power was there?  I do like the idea of making crappy earphones sound like good ones, through the magic of customized equalization.

saratoga:

--- Quote from: phr on March 26, 2014, 02:29:22 PM ---I had the impression at least at the start of this thread, that the OP didn't understand the difference between parametric eq (a few bands with variable center frequency and variable Q) and traditional eq (lots of fixed bands with fixed Q).  But I can't really tell.
--- End quote ---

I think part of the problem is that our interface doesn't make it easy to figure out what you are doing.  We just sort of assume the user understands how to use an EQ correctly.


--- Quote from: phr on March 26, 2014, 02:29:22 PM ---It does seem to me that increasing bands would increase CPU load, maybe beyond what the CPU in a little player like the Sansa Clip is capable of, and also mess up the phase response at normal sample rates.  Maybe it could work better with 96 khz sampling if the source material and cpu power was there?  I do like the idea of making crappy earphones sound like good ones, through the magic of customized equalization.

--- End quote ---

I don't know if the current implementation would even run at 96k, but in theory doubling the sampling rate just halves the resolution in the audible part of the spectrum while doubling the CPU requirement. 

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