Sorry if this has already been requested, but I don't read wish list that often. For some reason FM radio seems to have a lot more base than most of my mp3s (does this have anything to do with radio stations compressing the audio?). So when I switch back and forth between radio and mp3 I occasionally get vibrated half out of my seat by my subs. Would it be possible to have separate EQ settings for different input sources? Separate volume would be a nice touch too actually.

-Mike

The bassy hum switching to FM is a documented bug and should be fixed soon... Maybe in 2.0?

-Tony
MkII #554

OK, but I don't think that is what I am talking about. It is not just the initial switch to fm, it is always more bassy. It seems to get worse if the signal is a little weak (maybe that is just seems that way because the highs and mids get quieter).

-Mike

Hmmm ok. Well they've said there will be tuner enhancements, dunno if separate EQ's is on the menu though. I know when I asked about separate visualization settings for each source I was told to "stay tuned." Guess we'll see in less than 24 hours...

-Tony
MkII #554

I agree. There is considerable more low end than when playing an MP3.

Proud Owner of MK2 080000558 - 18gb Blue

try swapping your eq settings and see what happens.

no i don't blame the eq. i think it's a bug

Murray
Go-Wit-Da-Fro

Keep in mind that the radio stations EQ and compress the sh*t out of everything they broadcast. You would EXPECT the radio to sound different than the MP3s.

___________
Tony Fabris

We tweak the EQ (or maybe the Loudness) when switching into tuner, to compensate for the tuner signal which is rather light on the low end. Maybe we over tweaked it.

Rob

yeah, i'd have to say that i think you guys overtweaked. When i switch to the tuner i have to reach behind my seat and turn the gain down on my bass amp... it's that bad on my setup. I don't even leave it turned up that much anyhow, but it's definitely more than noticable when you switch from player to tuner... and that would explain it.


|| loren.cox ||

Cool, hopefully we can get it a little less tweaked somewhere in the 2.0 builds? Personally I would much rather have the tuner be short on bass than overly bassy. I don't listen to the radio much and when I do it is more likely to be some sort of talk show where I don't really want to hear bass anyway.

-Mike

I've entered it as a bug for a future update.

Rob

Mmm. It may or may not get changed. We compared it to other stock radios (Kenwood & Sony) who both boost the bass slightly in FM compared to CD. Without the boost, FM sounded very flat, and testers complained. It's a first order 6db boost with 125Hz cutoff.

You can try it without boost by modifying arch/arm/special/empeg_dsp.c (search for "bass"). Change the:

dsp_write(X_audioc, 0x2f80);

to

dsp_write(X_audioc, 0x2c00);

Hugo

My vi skills are a little week, anyone mind posting an updated "empeg_dsp.c"? Your thoughts on the change would be appreciated as well.



-Doug
Mk2-12G Blue (Now A/R Green)

I have to say that with my subwoofer, the boost is very noticeable. I didn't realize that it was your doing, I thought it was the radio station's doing.

Every time an announcer pops a "p", my whole car shakes. Perhaps it's a combination of your boost and the radio station's EQ work that's making it problematic?

___________
Tony Fabris

Thanks for the tip Hugo. It looks like the change needs to be made in empeg_mixer.c not empeg_dsp.c (at least I couldn't find anything relevant in there). I have compiled a kernel with that change and will try it on the way home from work today. If anyone else wants to try you can grab the kernel here (mk2 only, completely and totally untested).

-Mike

I have to say that my radio module here works just amazingly great. When on perfect quality stations there almost is no difference with the MP3s. And bass does not sound excessive at all. Also, there's no significant difference in volume between the player and the radio.


Taym
_________________________
MK II BLUE/RED 12GB #923

PERFECT!!! That fixes both of my complaints. The bass level is very comparable to my mp3 collection and the radio sounds louder so I don't have to adjust the volume when I change sources. Hugo, can we get some way to toggle that without recompiling the kernel? For me at least, the radio sounds much better with that change.

-Mike

Hmmm. The volume is not altered at all by that patch; the tone control filter has precompensation to leave the volume unaltered.

It may get added in later v2 builds, possibly with an option in emplode to turn it on/off. It's not going to get into the first few releases though I suspect.

Hugo

The volume is not altered at all by that patch; the tone control filter has precompensation to leave the volume unaltered.

But if you increase the bass (effectively decreasing the trebles and mids) shouldn't that decrease the apparent volume (at least on a system where bass is felt more than heard)? Anyway, that is what seems to be happening for me. Can someone else try that kernel and see if you get similar results?

-Mike

Thanks, this kernel hack fixes the tuner mega-bass problem. Although when I installed it, tfabris' groovy animation logo went back to the old v1.03 logo. Any idea what might be wrong? I'm running v2.00b3 consumer on a Mk2.

-Hoagy.

OK, Bottom line is these all sound like rigs. Could we add this as a feature request to have seperate EQ settings for Radio vs empeg? Just like how if you left it on one visual in empeg mode, and one in radio, it remembers which is which.

This would be sufficient for me to set a preset eq just for radio and leave it there.

Thanks.

(O|||||O)

Ummm, that kernel if for 1.03 only. I have no idea what may break running it with the 2.0 player. I am not setup to compile the 2.0 kernels yet and I may not have a chance for a few more days. However, the change I made is really simple if someone else wants to build a 2.0 kernel.

-Mike

If you still want a 2.0b3 kernel I finally have one up. This also has everything else but the proverbial kitchen sink included (hijack v15, voladj, irtrans, displayserver irpatch).

-Mike

Awesome! Can you add the single drive hack and sticky visualization mode hack? The ones that you have included that I am also interested in are the lessBass and volAdj hacks.

Your menuing system works really well in v15. A friend was playing breakout in my car yesterday while I drove.

Thanks,
-Hoagy.

Persistant settings needs to be updated for 2.0 and it's author said in another thread that he won't have a chance for another couple of weeks. I think 1disk has been updated, but I am not sure where to find it (anybody got a link?). BTW, the menuing stuff is not mine (mlord did it), but I agree it is very cool.

-Mike

IIRC, all the 1disk patch does is change the line:

while(on_if0<2 && retries<20);

to

while(on_if0<1 && retries<20);

in ide-probe.c. MLord's patch set actually does this too. Any 1disk patches from previous kernels should therefore still work to patch 2.0b3 source.

Gotcha, the 1disk patch I have will not apply cleanly over mlord's changes. I assume this is because he has already added the 1disk stuff. Does this mean the kernel I posted won't work on a 2 drive empeg? I don't recall exactly how 1disk is supposed to work.

-Mike

Yes it means it won't work on a 2 drive Empeg. I found this out the hard way, but it did give me the opportunity to check out the cool new "HD not found, contact RioCar support" screen. :)

I'm guessing mlord has a 1-drive Empeg and thus included that change in his kernel mods. As long as everyone with a 2-drive setup changes the 1 to a 2 in ide-probe.c, they'll be good to go.

Took me a couple minutes to figure what I did wrong, though. :)

Thanks for the info. Here is a two drive version of the kernel I posted above in case anyone needs it. I have not tested this since I don't have a 2 drive system *.

-Mike

* For another couple of days until the 30 gig drive I just ordered shows up :-)