Bass and Treble could be implemented on the exising DSP

You were too slow today, Grasshopper. We shall try again, tomorrow.

<cue Kung Fu music>

Oops, sorry. I knew that, but didn't write it clearly. I was under the impression that there was some reason it wasn't turned on in the empeg software. I think I read once that with the great EQ we have, the development team thought there was no need for a simple treble and bass adjustment. So, what I meant to say was "Updated DSP (only because Hugo mentioned it) and while you're at it, enable bass and treble adjustment" but that didn't fit into a list format .

That was a very nice humble pie I just ate

Hugo's throwing us a bone

Actually I think Hugo is just taunting us for his own amusement. Of course he is more that welcome to prove me wrong

That was a very nice humble pie I just ate

I honor your humility with a new avatar, Grasshopper.

lol. nice.

Thank you. That one took some research.

In reply to:

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Um, the current DSP has bass and treble, it's just that no one's implemented it in the software yet.

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Alright already! I've been meaning to and will definitely start working on it tonight. It's not quite as simple as you would think though. Possibly the loudness control might get a bit munged in the process. Would people be willing to ditch the loudness (or have it work differently, possibly not correctly) in favour of bass and treble?

Not to say I can't.... but I'm kinda covering myself

I was just kidding about the gps and color lcd, I'd be happy with a 100base ethernet only

BTW... Love the avatar Tony...

Wow.

You really have lost a lot of weight!

Would people be willing to ditch the loudness (or have it work differently, possibly not correctly) in favour of bass and treble?

Yes. In fact, if we could also have some control over the slope and cutoff point of the loudness control, that would be ideal.

When playing with the RTA stuff, I noticed that the loundess control was only really affecting the deepest of the sub-bass frequencies. It had a very sharp frequency peak in the near-subsonic range, and not much above that. I'd rather have it more smoothly increase all the low frequencies instead of just the sub-bass.

You really have lost a lot of weight!

Mmm. Hair, too.

Well it seems the loudness may not be affected by the bass and treble after all. However the FM bass boost will but I don't see that being much of issue with peope.

I'm having a few minor issues with calculating some of the DSP coefficients but once I sort that out we should be good to go.

As for affecting the slope and cutoff of the loudness, that's probably a separate project.

Also what kind of frequency points are we looking at here? Examples in the manual are 125Hz and 5kHz. Since it basically needs to be pre-calced, we can't have a variable frequency unfortunately. -6db to +6db enough? I only have 4 bits each to play with using genixias code, although Mark said he would give more bits once bass and treble were done properly.

ISTR that somebody wanted +/-9dB range, and somebody else wanted 0.5dB resolution. Can't win

I'd recommend starting by duplicating the existing range though. It's hard to say what values to use though - the existing EQ fudge is based upon center frequencies and Q factors, whereas the DSP algorithm is based on cutoff frequencies and order (2nd or 3rd IIRC). But I think off the top of my head that a 2nd order at the listed values should be a reasonable approximation to the existing controls. Let me check...

Hmm...

Bass is currently Fc=100Hz, Q=0.2
Treble, Fc=10KHz, Q=0.2

Q figures look wrong (always did) but sound right. Go figure.

Maybe, maybe not. Things sometimes move faster than expected

Hugo

Well, yes and no. Camelot was also the name because "it's the holy grail" (of in-car mp3 players). If you connect to a camelot from emplode, the player icon *is* a castle facade with a very obvious little triangular support keeping it upright.

Hugo

Ahh... I was wondering what the castle icon was for in Emplode's resources. Makes sense now

- Trevor

OK, I just had to see it.

Absolutely priceless....

This IS a really silly thread.

mmmmmh - castle - nice