E82 Logic 7 slight static noise on bass hits

ScottyGams · 08-17-2008, 12:05 PM

haha, brilliant rebuttle...

i am having a similar rattle sound coming from the passenger side rear of my car. I have had the techs replace BOTH speakers with no luck.

I use an iPhone 3G 16gb

mowmentous · 08-17-2008, 05:25 PM

I have the same problem, I'm taking my 1 in for a passenger side rattle, and I'll get them to look into the bass distortion issue while they are at it. And I too have removed mp3 compression as a potential problem by playing the original CD for a couple of songs during which the bass issue was noticeable. Same problem.

Dafdos · 08-19-2008, 08:11 AM

I´ve uploaded my test song to:

http://www.file-upload.net/download-..._test.zip.html

Maybe we confirm that we all hear the same problem - there are 5-6 higher tones at about 4:40 and 4:44, both bass tones after that (around 4:42 and 4:46) force the problem.

Das Ein · 08-20-2008, 12:59 AM

This was actually going to be my first post on this forum as well...but ended up being my second. :wink:

Anyway, I have this same exact problem. I actually noticed it on my first drive home from the dealership after buying my car. I ONLY listen to original audio CD music, and it is most noticeable on electronic/trance music. Seems to be mostly coming from the rear speakers, right after bass hits. Sounds like an electronic bass echo. I am going to take it to BMW, and have them hear it.

siddhartha · 08-20-2008, 01:06 AM

Quote:

Originally Posted by Dafdos

I´ve uploaded my test song to:

http://www.file-upload.net/download-..._test.zip.html

Maybe we confirm that we all hear the same problem - there are 5-6 higher tones at about 4:40 and 4:44, both bass tones after that (around 4:42 and 4:46) force the problem.

I can confirm that the problem is definitely present here and very noticeable.

siddhartha · 08-20-2008, 01:11 PM

I have attached a zipped MP3 of the portion of the song in question. Please play the MP3 on your computer; notice there is no faint 'buzzing' sound after bass notes. Then play the MP3 on your Logic 7 and notice the faint, but noticeable 'buzzing' after every bass hit.

You will probably have to have the windows up and the volume at a level such that it would be difficult to hear someone talking at a normal level. It doesn't have to be excessively loud as you can hear the distortion at low levels as well, but it's much more noticeable at higher levels.

You will also need to be driving at speed (20km/hr +).

Das Ein · 08-20-2008, 04:25 PM

I did notice that the buzz was much louder with the Logic 7 on...but I still do notice it when it is switched off as well. :iono:

On a side note, my window sticker lists "stronger electricity supply" in the options. Anyone else have this, and get the buzz? Could they be related?

BeeNice · 08-21-2008, 05:09 PM

Same problem in mine. It occurs on CDs, ipod, AM, etc.

Dafdos · 08-30-2008, 05:15 PM

Any updates on this problem? Was on vacation for two weeks so I had no time to ask my dealer about it.

HondaGoneRogue · 08-31-2008, 02:31 PM

I've got it too, bugs the hell outta me considering I always go aftermarket and this logic 7 cost me $875.00 and sounds worse than my old civic. Don't even try to close the doors and turn up the music, listen to it from outside, "factory ghetto rumble". Rediculous. The dealer here is gonna hate me lol.

Edit: just found this......
http://www.1addicts.com/forums/showthread.php?t=14967

siddhartha · 08-31-2008, 07:18 PM

Quote:

Originally Posted by HondaGoneRogue

Edit: just found this......
http://www.1addicts.com/forums/showthread.php?t=14967

Ya the buzzing isn't loud like that. The problem I am having is what sounds to be a ground loop somewhere. Once again though, I only hear it when the car is at speed.

Jockey · 09-01-2008, 11:11 PM

I've got the same thing. It's unfortunate that's a recurring problem and something that can't be fixed with the stock system it sounds like.

siddhartha · 09-03-2008, 12:05 PM

Bad news. Today I brought the car into my local dealer, Brian Jessel, the largest BMW dealer in Canada. They had never heard of the problem before and the technician was realistic in his assessment that the sound system probably had to be re-engineered. Obviously, a service department isn't about to take that on. He was also straining to hear the sound and since it's so subtle (but very annoying once you notice it), most people aren't likely to complain and thus BMW AG probably isn't going to do anything about it.

I could generate a bunch of tones and determine the frequency range that causes the problem and send that off to BMW, but really, more people need to complain for something to get done.

Until then, I am a bit po'ed that a $1,200 sound system has interference/distortion.

Bullitt · 09-04-2008, 02:08 PM

I have been experiencing this bass problem too... In an odd way, it is a little comforting to know I'm not the only one with this disappointing defect.

Quote:

Originally Posted by siddhartha

... He was also straining to hear the sound and since it's so subtle (but very annoying once you notice it)...

The first 6 seconds of the song "Say It Right" by Nelly Furtado displays this bass problem very clearly. The technician would have to be deaf if he couldn't detect the distinct distortion in bass with this particular song. It is not subtle here.

siddhartha · 09-04-2008, 10:16 PM

I got a call from the dealership today and they told me they contacted BMW and, of course, they had not heard of the problem either. A case was opened up though and supposedly engineering is looking into it. I strongly urge anyone who has this problem to bring the car into their dealership. Let's get some complaints up to corporate so they might actually do something about it.

1erich · 09-06-2008, 01:27 PM

I have a logic 7 dsp on order and after reading this thread I regret checking that box. I personally would get tired waiting for BMW to do something about it. Anybody here know how to fix it? A DIY for this would be perfect.

siddhartha · 09-06-2008, 07:48 PM

Quote:

Originally Posted by 1erich

I have a logic 7 dsp on order and after reading this thread I regret checking that box. I personally would get tired waiting for BMW to do something about it. Anybody here know how to fix it? A DIY for this would be perfect.

I would start by running the ground wire coming from the amp directly to the negative terminal on the battery and see if that does anything. I would also check to make sure that the head unit output cables and speaker cables are run on the opposite side of the car as the power cables.

siddhartha · 09-07-2008, 05:05 AM

Just an update on this, it appears the sound does increase in volume with acceleration. It's very subtle, but I'm almost positive it's happening. This would lead me to think that it is some sort of alternator whine (http://www.caraudiohelp.com/newslett...ator_whine.htm).

imported_TheDude · 09-09-2008, 05:52 PM

Hey all,

Very glad to hear this problem is not limited to just me. My '08 335 has the same issues. Some info that may be useful:

Two songs that reliably produce the buzzing/static:
1) "I Wanna Love You" by Akon / Snoop
2) "Set the Ray to Jerry" by Smashing Pumpkins

(Have not tested the Nelly Furtado, but will test it.)

I can confirm the problem is NOT the iPod or the track quality -- I've listened to the songs on a set of good earphones, headphones, stereo, and the Logic 7. The problem only exists on the Logic 7.

More importanty, I took the car into the dealer today, and here is what they have said so far:

1) Yes, the mechanic can reproduce the problem/hear it.
2) Yes, *they acknowledge the song is not playing correctly.* (This is huge.)
3) The system still passes the BMW factory audio test.
4) Because of #3, they cannot do anything to fix this, as there is officially not a problem.

I told the service rep that while I know it's not her fault, this is not acceptable and will probably develop into a larger problem.

Next steps are to request the mechanic look at the amp and wiring, as was mentioned earlier. I am planning to escalate this as needed, and possibly file with the BBB.

More as it develops.

Bullitt · 09-09-2008, 06:23 PM

Welcome to the forum, TheDude!

Yes, it is not an issue of the quality or encoding because I too have tested on other systems without any of this distortion. I will test those 2 songs when I get a chance.

siddhartha · 09-09-2008, 07:27 PM

If someone has a hand-held recorder, could they please record the exact distortion that is happening. I would like to analyze the frequencies it occurs at and have a sound byte of the interference itself. This way, when we all bring our cars to the dealerships, we can play for them the sound that they should be listening for, in case it's not all that obvious.

uid90283 · 09-10-2008, 10:07 AM

I have the exact same problem, but only on deep bass sounds. Swift135 made a good comparison, I plan to do the same experiment. Sounds like the problem lies in the MP3 decoder and not the hardware of the system. I am going to test the original cd (not written from mp3), the mp3 on a memory stick and via my expensive ipod cable and ipod. If the problem exists in only the memory stick, then it is for sure the MP3 decoder in the car causing the noise and not any hardware problems.
Anyone know if the mp3 conversion is something that can be flashed or is it done in a hardware chip?

08-17-2008, 12:05 PM	#23
ScottyGams Uber-Lee7 Member 47 Rep 1,440 Posts Drives: E92 M3 Join Date: Jun 2007 Location: NYC iTrader: (2)	haha, brilliant rebuttle... i am having a similar rattle sound coming from the passenger side rear of my car. I have had the techs replace BOTH speakers with no luck. I use an iPhone 3G 16gb __________________ http://www.facebook.com/Scotty.Gammon
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08-17-2008, 05:25 PM	#24
mowmentous Private 7 Rep 83 Posts Drives: bmw Join Date: Aug 2008 Location: n/a iTrader: (0)	I have the same problem, I'm taking my 1 in for a passenger side rattle, and I'll get them to look into the bass distortion issue while they are at it. And I too have removed mp3 compression as a potential problem by playing the original CD for a couple of songs during which the bass issue was noticeable. Same problem.
	Appreciate 0 Quote

08-19-2008, 08:11 AM	#25
Dafdos New Member 0 Rep 9 Posts Drives: Join Date: Aug 2008 iTrader: (0)	I´ve uploaded my test song to: http://www.file-upload.net/download-..._test.zip.html Maybe we confirm that we all hear the same problem - there are 5-6 higher tones at about 4:40 and 4:44, both bass tones after that (around 4:42 and 4:46) force the problem.
	Appreciate 0 Quote

08-20-2008, 12:59 AM	#26
Das Ein Captain 31 Rep 815 Posts Drives: '16 Audi TTS, '17 500 Abarth Join Date: Aug 2008 Location: The Colony, TX iTrader: (4)	This was actually going to be my first post on this forum as well...but ended up being my second. :wink: Anyway, I have this same exact problem. I actually noticed it on my first drive home from the dealership after buying my car. I ONLY listen to original audio CD music, and it is most noticeable on electronic/trance music. Seems to be mostly coming from the rear speakers, right after bass hits. Sounds like an electronic bass echo. I am going to take it to BMW, and have them hear it.
	Appreciate 0 Quote

08-20-2008, 04:25 PM	#29
Das Ein Captain 31 Rep 815 Posts Drives: '16 Audi TTS, '17 500 Abarth Join Date: Aug 2008 Location: The Colony, TX iTrader: (4)	I did notice that the buzz was much louder with the Logic 7 on...but I still do notice it when it is switched off as well. :iono: On a side note, my window sticker lists "stronger electricity supply" in the options. Anyone else have this, and get the buzz? Could they be related?
	Appreciate 0 Quote

08-21-2008, 05:09 PM	#30
BeeNice New Member 0 Rep 12 Posts Drives: Join Date: May 2008 iTrader: (0)	Same problem in mine. It occurs on CDs, ipod, AM, etc.
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08-30-2008, 05:15 PM	#31
Dafdos New Member 0 Rep 9 Posts Drives: Join Date: Aug 2008 iTrader: (0)	Any updates on this problem? Was on vacation for two weeks so I had no time to ask my dealer about it.
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08-31-2008, 02:31 PM	#32
HondaGoneRogue They like my Swag... 433 Rep 3,762 Posts Drives: 15 GSM 435i GC Join Date: Aug 2008 Location: South Dakota iTrader: (4) Garage List 2015 435i Gran Coupe [0.00]	I've got it too, bugs the hell outta me considering I always go aftermarket and this logic 7 cost me $875.00 and sounds worse than my old civic. Don't even try to close the doors and turn up the music, listen to it from outside, "factory ghetto rumble". Rediculous. The dealer here is gonna hate me lol. Edit: just found this...... http://www.1addicts.com/forums/showthread.php?t=14967 __________________ 2015 435i Gran Coupe - Current 2008 AW 135i - Sold
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09-01-2008, 11:11 PM	#34
Jockey Brigadier General 3451 Rep 4,983 Posts Drives: 992 C4S Join Date: Mar 2008 Location: Park City, UT iTrader: (1)	I've got the same thing. It's unfortunate that's a recurring problem and something that can't be fixed with the stock system it sounds like.
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09-03-2008, 12:05 PM	#35
siddhartha Enlisted Member 3 Rep 45 Posts Drives: Join Date: Aug 2008 iTrader: (0)	Bad news. Today I brought the car into my local dealer, Brian Jessel, the largest BMW dealer in Canada. They had never heard of the problem before and the technician was realistic in his assessment that the sound system probably had to be re-engineered. Obviously, a service department isn't about to take that on. He was also straining to hear the sound and since it's so subtle (but very annoying once you notice it), most people aren't likely to complain and thus BMW AG probably isn't going to do anything about it. I could generate a bunch of tones and determine the frequency range that causes the problem and send that off to BMW, but really, more people need to complain for something to get done. Until then, I am a bit po'ed that a $1,200 sound system has interference/distortion.
	Appreciate 0 Quote

09-04-2008, 10:16 PM	#37
siddhartha Enlisted Member 3 Rep 45 Posts Drives: Join Date: Aug 2008 iTrader: (0)	I got a call from the dealership today and they told me they contacted BMW and, of course, they had not heard of the problem either. A case was opened up though and supposedly engineering is looking into it. I strongly urge anyone who has this problem to bring the car into their dealership. Let's get some complaints up to corporate so they might actually do something about it.
	Appreciate 0 Quote

09-06-2008, 01:27 PM	#38
1erich Second Lieutenant 4 Rep 244 Posts Drives: 09 135i Join Date: Jul 2007 Location: Calgary iTrader: (0)	I have a logic 7 dsp on order and after reading this thread I regret checking that box. I personally would get tired waiting for BMW to do something about it. Anybody here know how to fix it? A DIY for this would be perfect.
	Appreciate 0 Quote

09-07-2008, 05:05 AM	#40
siddhartha Enlisted Member 3 Rep 45 Posts Drives: Join Date: Aug 2008 iTrader: (0)	Just an update on this, it appears the sound does increase in volume with acceleration. It's very subtle, but I'm almost positive it's happening. This would lead me to think that it is some sort of alternator whine (http://www.caraudiohelp.com/newslett...ator_whine.htm).
	Appreciate 0 Quote

09-09-2008, 05:52 PM	#41
imported_TheDude New Member 0 Rep 12 Posts Drives: Join Date: Sep 2008 iTrader: (0)	Same problem in 335i Hey all, Very glad to hear this problem is not limited to just me. My '08 335 has the same issues. Some info that may be useful: Two songs that reliably produce the buzzing/static: 1) "I Wanna Love You" by Akon / Snoop 2) "Set the Ray to Jerry" by Smashing Pumpkins (Have not tested the Nelly Furtado, but will test it.) I can confirm the problem is NOT the iPod or the track quality -- I've listened to the songs on a set of good earphones, headphones, stereo, and the Logic 7. The problem only exists on the Logic 7. More importanty, I took the car into the dealer today, and here is what they have said so far: 1) Yes, the mechanic can reproduce the problem/hear it. 2) Yes, they acknowledge the song is not playing correctly. (This is huge.) 3) The system still passes the BMW factory audio test. 4) Because of #3, they cannot do anything to fix this, as there is officially not a problem. I told the service rep that while I know it's not her fault, this is not acceptable and will probably develop into a larger problem. Next steps are to request the mechanic look at the amp and wiring, as was mentioned earlier. I am planning to escalate this as needed, and possibly file with the BBB. More as it develops.
	Appreciate 0 Quote

09-09-2008, 06:23 PM	#42
Bullitt Major 91 Rep 1,168 Posts Drives: 135i Join Date: Apr 2008 Location: SF Bay Area iTrader: (18) Garage List 2008 135i [0.00]	Welcome to the forum, TheDude! Yes, it is not an issue of the quality or encoding because I too have tested on other systems without any of this distortion. I will test those 2 songs when I get a chance.
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09-09-2008, 07:27 PM	#43
siddhartha Enlisted Member 3 Rep 45 Posts Drives: Join Date: Aug 2008 iTrader: (0)	If someone has a hand-held recorder, could they please record the exact distortion that is happening. I would like to analyze the frequencies it occurs at and have a sound byte of the interference itself. This way, when we all bring our cars to the dealerships, we can play for them the sound that they should be listening for, in case it's not all that obvious.
	Appreciate 0 Quote

09-10-2008, 10:07 AM	#44
uid90283 New Member 0 Rep 27 Posts Drives: BMW 335i Join Date: Mar 2008 Location: ontario iTrader: (0)	I have the exact same problem, but only on deep bass sounds. Swift135 made a good comparison, I plan to do the same experiment. Sounds like the problem lies in the MP3 decoder and not the hardware of the system. I am going to test the original cd (not written from mp3), the mp3 on a memory stick and via my expensive ipod cable and ipod. If the problem exists in only the memory stick, then it is for sure the MP3 decoder in the car causing the noise and not any hardware problems. Anyone know if the mp3 conversion is something that can be flashed or is it done in a hardware chip?
	Appreciate 0 Quote