I have hooked up Alpine S634 to the oem becker 1692 headunit via a soundgate adapter. everything works greaet and the sound is excellent. There is one issue however that I can't figure out. when listening to mp3 CDs, pressing a next track button on head unit results in what looks like changer freezing, and the only way to get it out of this condition is to change a disk. With regular audio CDs the unit change tracks flawlessly. Has anybody had similar simptoms? Any alpine discussion forums that might be helpful?
Thanks

I have figured out. there is a limit of 99 files per cd that the adapter can handle. they all have to be in one folder.