| I personally used the Pioneer CDRB-10 adaptor as I have a Pioneer head unit. Most modern head units have some way of hoooking up an aux. input through an adaptor..some even have RCA input jacks on the unit or wiring harness. I think it would be tougher using a stock car audio system...but if it had a cd changer input, it might be possible. You'd need some sort of connector wiring diagram, to tell which lines were LEFT, RIGHT, GND...or you could send a test signal testing every pin, till you get audio over the speakers. That itself could be dangerous, and also some cd changer inputs are low voltage only, as my Pioneer aux adapter also is. It can only take a max of 1V, which is very low...most headphone outs are much higher 2V or more. Using the headphone out on the i-o would work ok, as long as you kept output at 1V. Using a voltmeter or scope, you could set the voltage thru the volume control in Windows or on the front cover. But the headphone out is really meant for headphones, which are relatively high-powered, low impedance drivers. Any RCA line inputs or inputs through the cd-changer jack are really low power, high-impedance inputs. For these inputs then, you should also use line-level [low power, high impedance] outputs from the i-o. For line-levels of less than 1.5V, you can use the VOC out directly from the yamaha chip. It has a max out of 1.5V and is a high-impedance output, perfect for the aux in's on your car stereo. I have a page up about the audio line out here: http://www.engr.uconn.edu/~ameer/
If you notice low volume listening to the i-o over the speakers [relative to tape or radio volume], you need a higher voltage output. There is a way to get the main outputs to get rid of that annoying channel crossing. I think you just need to remove one sm resistor and you could take the line outs right off the main outputs of the yamaha, and still have the headphones work off the LM4835. Don't remember the link now. The main analog outs have a max of 2.8V I believe. If you need an even higher level, low impedance output such as for a cassette adaptor, you could work right off the headphone out...although the output quality might be questionable. You have to keep in mind this is not a line out...line-outs are the cleanest outputs and have a very flat frequency response for a quality sound.
-ameer | |
