Home › Forums › temp › Using PC for audio source – Is earphone jack sufficient? › Corroberation
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PhilB is completely correct in everything he supplied. A print-out of his comments will be added to my documentation, because it covers a few points I haven’t seen in my previous docs.
Every desktop computer I have known has a sound circuit on the motherboard, and ours is a Gigabyte board, which serves our needs with very clean quality, except that there were some limitations we needed to solve.
The audio circuit, while of high quality, seems like an unfinished piece of work. Mainly, the line input has the same wide open gain as the mic input, so I think the manufacturer skimped and simply used the mic input for both.
In the software mixer, and there are two versions, one by XP and the other by Gigabyte with better colors, both have the Line Input gain control ghosted, so that it cannot be changed in software.
What we ended up doing was building a T-pad with 3-resistors in a small black box to reduce the line level coming from our Radio Shack mixer down to mic level, to avoid over-load distortion.
All audio ins and outs are mini-plug, which I dislike, but it’s holding together so I leave it alone.
There are two entirely separated stereo-pair audio channels, so we’re able to send our streaming and broadcast audio over audio 2 and use audio 1 for editing and auditioning of other material.