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Custom Aux-In Module

Old 01-08-2004, 09:40 AM
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I am trying to get the Mazda6Club people to get on this board, and some have, but I started a thread over there for the truly lazy to show support.

http://www.mazda6club.com/forums/read.php?TID=13767
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Old 01-08-2004, 11:29 AM
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Originally posted by bkrodgers
---8<---8<---
So, I could either get the tape deck as I planned, or wait for the module...module is cheaper, but tape deck is available now, and I'm anxious to get my MP3 player working in the car. Just how much better is the auto quality on the module over both A, a tape adaptor, and B, the tape mod?
-8<---8<----
It's up to you. I'm sure that at some point, Mazda will dislike this module, since it can potentially reduce sales of their tape deck, but they should have been smarter and added an Aux-In plug.

The difference in sound quality is Night vs. Day. The tape has hiss, and isn't clean. The test version sounds as clean as a CD.


Regards,

OverLOAD
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Old 01-08-2004, 11:43 AM
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01-04 Miatas want this, too!

Count me in as a Miata owner (2002 LS, bose, CD, no tape). I'd buy an aux-in adapter in a heartbeat! I'm mostly interested in a simple aux-in, selected with the tape/md switch. Hopefully no changes to the dash to keep it looking stock. The cubby hole in the console between the seats is a perfect place for an Ipod!

FYI, we're talking about it over in Miata Forum Aux-in thread.

Steve
2002 Miata LS
(used to have a 1987 RX-7 GXL)
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Old 01-08-2004, 11:48 AM
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Is the actual audio signal on the mazda connector carried as a digital (i2s or spdif?) or analog signal? If its an analog signal, why bother with the spdif->analog conversion on a board for $50? I don't think you'd be able to put a much better D-A section on a $50 board than whats in most consumer devices that have an spdif output in addition to analog. Just my 2c...

Also, has this been confirmed to work on a Mazda3? I found a link to this forum from a 3 site, but nobody had confirmed if the modules were in fact identical to the rx8/mazda6.

Please put me on the email list, I'll buy one as soon as I get my 3 if it works.
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Old 01-08-2004, 12:42 PM
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I am interested in this as well.

Last edited by kevinp; 01-08-2004 at 08:04 PM.
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Old 01-09-2004, 12:06 AM
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Definately interested, would like something cleaner sounding than my XM through an FM Modulator

The ability for it to be on Tape/MD button would be a HUGE plus also, no more wasted preset for 87.9FM
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Old 01-09-2004, 01:02 AM
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i'm IN!
RCA all the way for this 6 owner!
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Old 01-09-2004, 07:29 AM
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Originally posted by patricklang
Is the actual audio signal on the mazda connector carried as a digital (i2s or spdif?) or analog signal? If its an analog signal, why bother with the spdif->analog conversion on a board for $50? I don't think you'd be able to put a much better D-A section on a $50 board than whats in most consumer devices that have an spdif output in addition to analog. Just my 2c...

Also, has this been confirmed to work on a Mazda3? I found a link to this forum from a 3 site, but nobody had confirmed if the modules were in fact identical to the rx8/mazda6.

Please put me on the email list, I'll buy one as soon as I get my 3 if it works.
It's an analog connector, but requires a lot of other bus data and connections to be detected to enable it when you press 'tape'. I personally would like an electrical SPDIF for my Archos, just to make it more immune to noise. Any SPDIF would sound cleaner than its analog counterpart, just by that fact alone..

Regards,

OverLOAD
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Old 01-09-2004, 09:38 AM
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Eh what the heck. I'll post another "I'm interested" reply. Can't hurt
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Old 01-09-2004, 09:44 AM
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Originally posted by OverLOAD
My partner has a Mazda6, and over the weekend, we put in a very early test system. We connected the audio into the source, and wow, it sounded as good as, or even better than a CD.

The module is coming along, and without a doubt, you'll want some superb high-quality music to pipe into it.
So it's really working? Great!

One question we Miata folks have, though, is whether the pinout is exactly the same. Our head unit is slightly different (an older generation) than the 6 and 8 have. I hope the unit will work in our version! The '04 Miata has the same unit as yours, FWIW.

Stephen
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Old 01-09-2004, 11:25 AM
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Sign me up as well!

Vince
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Old 01-09-2004, 12:26 PM
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Originally posted by OverLOAD
It's an analog connector, but requires a lot of other bus data and connections to be detected to enable it when you press 'tape'. I personally would like an electrical SPDIF for my Archos, just to make it more immune to noise. Any SPDIF would sound cleaner than its analog counterpart, just by that fact alone..

Regards,

OverLOAD
You should drop by head-fi.org and headwize, there's a few threads on DIY DAC's. You may also want to take a peek at the pimeta schematic (headphone amp) for a relatively simple analog section with active ground, that could make a pretty big difference with the car's noisy ground, whether its an analog in going through a unity gain amp, or digital.

Drop me an email if you guys need any help with anything, I'm an EE as well, but unfortunately won't be getting a 3 for a few more months.
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Old 01-09-2004, 07:18 PM
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Overload,

I am using the Transpod with my iPod and would love to have a cleaner way in. Keep me posted! I have the CD Bose unit.
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Old 01-09-2004, 07:27 PM
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Me too! x2 for the 8 and the 6.
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Old 01-09-2004, 07:43 PM
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me too x 2 for the 8 and the 3 (if it turns out to use the same i/f)
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Old 01-11-2004, 08:55 PM
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Wow... count me too... Please email me at [email protected] when it is ready!
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Old 01-12-2004, 12:16 AM
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I am all over this too. The only thing that could make my 8 cooler is 40GB of iPod.

Let me know when it's ready!!!

Thank god for you!
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Old 01-12-2004, 03:56 AM
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Count me in too!! let me know when it's ready!!
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Old 01-12-2004, 10:02 AM
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Please let me know when it is available.
[email protected]
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Old 01-12-2004, 04:21 PM
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This post has set me to come to the conclusion that my idea (Alpine or Pioneer MP3 Changer with FM Modulation) is an bad one.

I will see the shape of the thing before I count myself in.

But I will be watching, this thread (and the other one) with interest.

Thx Overload
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Old 01-12-2004, 05:39 PM
  #96  
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Someone asked for a picture of the development kit..

It's kind of messy, but it does the job of spying on the head unit pretty well.. With a couple of other modifications and wires connected into the tape module (pretty extensive so far), we've gotten the unit to send audio on a 'simulated' tape mode.

OverLOAD

edit: ps.. This in no way represents what the production board will look like..
Attached Thumbnails Custom Aux-In Module-tapesim.jpg  

Last edited by OverLOAD; 01-12-2004 at 05:42 PM.
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Old 01-12-2004, 05:40 PM
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And the wires plugged into the Tape module... There's a bunch of wires going all over the place. Not really an informative picture, but I figure you guys want to see what we're doing.

Regards,

OverLOAD
Attached Thumbnails Custom Aux-In Module-hu-tape.jpg  
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Old 01-12-2004, 05:51 PM
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Keep up the good work
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Old 01-12-2004, 11:20 PM
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Thanks for the pics OverLOAD. I was really wondering what the dev stuff looked like. Just wondering, now that I see how you have it all hooked up, how confident that you will be able to get the required cassette adapter pin header? I'm only asking because I see that you are connecting through an existing cassette adapter at this point. But I conceed that you may only be doing this for protocol hacking purposes.

Anyway, keep up the great work. And thanks again for the pics, they're always welcome
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Old 01-13-2004, 12:16 AM
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This is very very cool, but I'm quite impatient....just how much better quality can I expect out of this over a tape adapter or the tape hack? Obviously, this will be cheaper than the $180 or so for the tape deck, but putting that aside and just looking out sound quality, is it likely to be worth the wait?

Also--is this sort of thing likely to have any warranty implications? If I had some problem with the stereo and they saw this thing in there, do you think the dealer might try to claim that the module was to blame? I can imagine some companies making just such a claim if you plugged a custom electronic device onto a proprietary bus that was created through reverse engineering....

Thoughts on either question? Thanks!
-Brian

Last edited by bkrodgers; 01-13-2004 at 12:24 AM.
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