I developed a CD-Changer emulator, so I can use the Stereo-Audio input of the radio.

My "main" audio source is a modified HDD Multimedia player.
The device holds an 80GB 2,5" notebook HDD.
I developed an interface module to fully control this player via the onboard-monitor buttons.
The interface also emulates a BMW CD-changer so that I can connect it to the CDC stereo audio input.
Video is connected to the TV Tuner.

As you know, with the [mode] button of the onboard-monitor , you can circle switch the audio source between Radio, Tape and CD-changer.
As soon as you switch to CD-changer, my interface module switches the monitor image to the TV-Tuner image but the audio source will not be switched to TV-Tuner audio.
In this mode, the onboard-monitor buttons have new funktions to control the multimedia player.
e.g.: nav turn-knob to navigate through the menus,"1" is play, (opposite) "4" is stop, "2" is prev. "5" is next and so on...

The interface module also enables tv in motion (otherwise I could not see the players user interface)

The player makes it possible to use your own designed background.
So I designed a "BMW look" background that it looks like the rest of the onboard-monitor interface (blue)

in summery:
- player's audio is connected to CD-changer input of radio
- interface module emulates CD-changer to enable the radio's CD-changer input
- player's video is connected to TV-Tuner
- interface module enables tv in motion
- when switching throught with the [mode] button and you switch to CDC, the players interface will be displayed (in "BMW look")

advantages:
- absolutely fully integrated into the BMW system
- still hear and see the gps-navigation interrupts
- take 1000s of MP3s and Videos with you
- you can Play MP3, WMA, OGG, DivX, MPEG and DVD-Video (DVD files with full DVD menu like played with a Home DVD-player) and photo-images
- upload new files to the player via USB2.0 (with Notebook in the car or take the player out and copy with your home-PC)
- installation takes about 5 Minutes (only in trunk)


all in all:
it' like the BMW CD-Changer but holds massive audio and video content.
After coping content to the player, connection in the trunk (plug&play) you can start.

I hope you understood, all I wrote


The user interface:



the "special" buttons in media-player mode:
("1s" describes the function of the button if you press it longer than 1 second)