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Stereo Mix no longer seems to work on my computer -- it did once in windows xp, but now I am unable to receive any sort of audio from it. When trying to record it with programs such as Virtual Audio Streaming, it reports that there is an error opening the sound device. Additionally, I can make no changes whatsoever to Stereo Mix, such as with regards to default format, where it simply reports Format not supported by device

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migrated from Jun 6 '13 at 9:43

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Stereo Mix is a software? – Raptor Jun 6 '13 at 6:15
You probably upgraded your sound card drivers, and this channel is no longer available. – Brad Jun 6 '13 at 13:04

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