Seperate EQ settings for tuner

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.

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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?

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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
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MK II BLUE/RED 12GB #923