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Audio Line In Question
Audio Line In Question

New MessageAudio Line In Question (modified 0 times) Scott_A
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Okay, I got done with the Audio Line Out modification last night, where you piggy back the SMT capacitors connected directly to pins 77 and 78 (voice out L/R) of the Yamaha chip, and have an inline 1uF capacitor for each line. This works great. I noticed on the Yamaha sound chip's spec sheet that there is also 'voice in L/R' on pins 79 and 80. My main concern is, when I trace these pins to an SMT capacitor, I trace them to the opposite end of the SMT capacitor in which pins 77 and 78 are connected. If I do lines connecting pins 79 and 80 to those opposite ends with inline 1uF capacitors also, will I get the desired line in usage? Thanks -- Scott
02-21-2001 18:32:52

New MessageRE:Audio Line In Question (modified 0 times) brian
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OK, to help prevent you fom having to trace more traces on your IO, Here is all the work already done for you. Check figure 1 at the botom of the page. For a better picture try downloading the Word document. http://mtu.net/~bjcouche/I-O_Audio.htm Now to answer your question, Don't use either, Don't use the voice inputs at all. If you want a line input why not use the inputs labled "line input"? You will be able to control the input level with the line input slider bar in windoze. To connect to the line inputs just connect a .47 or 1uF cap in series with your line input and wire it to the Yamaha side of the cap. The caps are much easier to solder to than the Yamaha. If you really want to get fancy solder it to the test point (E and D) on the bottom of the MB as listed im my diagrams. I can't remember which input is which in reference to the AUX1 and AUX2 inputs. I think one is controlled by the CD slider bar and the other is controlled with the aux slider bar... I'd check my IO but it's out in my car. I'm using both the line input and aux1 input. I don't think that the voice inputs are adjustable by windows.

hope this helps,

Brian

03-15-2001 20:44:26

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