Stereo line-level analog audio input?

The analog audio input on my machine seems to be mono only. If I put in a stereo line-level signal it just duplicates the left channel on the right. Is there any way to input a stereo line-level signal through this jack?
ALFRED GUZZETTI

The input source is a DV tape deck. At the head of finished tapes I record bars and tone. The first segment of the tone is on both channels. It is followed by tone on the left channel only, then the right channel only. When I monitor what the computer is getting either through headphones or direct the input to Soundtrack Pro, where the meters display left and right, I hear and see sound on both channels from both the stereo input and the left-channel input (which shows up on both channels in the computer). The right channel only input is not audible or visible on the meter. The computer has always been this way. I assumed, maybe wrongly, that the input uses a stereo jack since these are pretty universal, but that in effect, the input is mono.
Alfred Guzzetti
2.66gHz Mac Pro
OS 10.4.11

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Analog audio input?

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Man, you're the saver of the day!
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Digital In via 3.50 mm (/8-inch) jack on rear bracket (sharing with the Line In/Microphone In jack)Message Edited by soundguy on 2--2005 04:53 AM

Thank you very much for your reply. This is what I was hoping not hear though...
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Originally I was going for a "Sound Blaster Easy Record", but I cannot find it anywhere in Europe, only in some e-stores in Hong Kong and Australia, and I don't want to order from that far, because the shipping costs will double the final price.
I think I will have to settle with a combo jack splitter and only record the "left" channel.
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Download and run dpclat from: http://www.thesycon.de/dpclat/dpclat.exe
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Stereo line-level analog audio input?

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