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'[OT]Pioneer automobile P-bus'
1998\12\07@142226 by Bob Blick

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Anyone have info or a link to information on the P-bus used on Pioneer
automobile CD changers and head units? Anything at all, please. I'd really
like to be able to use my head unit to control a linux box(yet another
mobile mp3 player) and display track info. Currently I have the Pioneer
aux-in module to feed audio into the head unit, but the controls and
display are static and I will be forced to use a separate keypad and
display.

Thanks,

Bob

1998\12\07@184218 by Ricardo Seixas

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Hi Bob,

       I can't help you with P-bus, but I'm just curious, wich storage device
do you use ? FlashDisk ?
       I'd like to set up a similar system, since you've already been there...
       Is the overall sound quality good ?
       Wich sample rate you rip your CD's ? 320K/s MPEG1 Layer3 ?
       My idea was to interface a 20x4 LCD with LED backlit serialy (With a PIC
to stay not so OT)
to the Linux box and control via a custom keypad, but your idea to use the
Pionner sounds cleaner.Hmmmm.
       Did you already tried to analyze the signal ?

Ricardo Seixas

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1998\12\07@195248 by Bob Blick

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>         I can't help you with P-bus, but I'm just curious, wich storage device
> do you use ? FlashDisk ?
Just a regular hard disk. Currently a 3.5 gig Maxtor. The automobile
environment is actually quite soft(and Maxtor has the "no-quibble
warranty")
>         I'd like to set up a similar system, since you've already been there..
.
>         Is the overall sound quality good ?
>         Wich sample rate you rip your CD's ? 320K/s MPEG1 Layer3 ?
128kbits/second. Sound is 95% cd quality. Not perfect, but very good. It
only occasionally sounds like you are running a gentle flanging effect.
Noise is not as good as CD, but that is due to SoundBlaster 16 hardware.
Different encoders have different results. Only the Xing encoder is very
good. it is also expensive, unless you buy MusicMatch:
http://www.musicmatch.com
It uses licensed Xing encoder and is only $USD30.

>         My idea was to interface a 20x4 LCD with LED backlit serialy (With a P
IC
> to stay not so OT)
> to the Linux box and control via a custom keypad, but your idea to use the
> Pionner sounds cleaner.Hmmmm.
>         Did you already tried to analyze the signal ?
I do not have a Pioneer CD changer, and can't get the head unit to talk
out the bus by itself, so no luck there.

-Bob

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