From: Matt Brubeck <mbrubeck@cs...> - 2004-01-20 19:04:11
Bill StJohn wrote:
> > Are you getting a pair of identical tracks, or a single mono track?
> The former, I think. Some background might clear this up:
> For testing purposs, I'm using a stereo vinyl recording of three
> acoustic instruments: piano, bass & drums. The drum track plays in
> both channels, while the piano is heard in only the right channel, the
> bass only in the left. So, using headphones, you hear drums and piano
> (no bass) on the right, while on the left you hear drums and bass (no
> So, I drop the needle, hit Audacity's record button (the red dot), and
> up pops ONE audio track (i.e., one appearance of "Audio Track" just to
> the right of the cancel "X" button) which contains TWO real-time wave
> forms. During a typical test, I record about 10 seconds, and hit stop
> (yellow square).
> At this point I see two wave forms that, to MY eyes at least, appear
> identical, which, I assume, would NOT be the case if Audacity were
> "hearing" bass in one side and piano in the other. (The bass & piano
> are playing completely different rhythmic figures -- the bass is
> basically hitting the quarter notes, while the piano accompanies with
> much more rhythmic variety).
It sounds like Audacity is set up correctly, but the signal coming into
it is mono.
Check your hardware and cabling. Make sure that cable between the
turntable and the computer is stereo, and also the jacks that both ends
of the cable are attached to. Many computer sound inputs are mono only
(often, the Mic input is mono and Line In is stereo).
You can test the input signal by going to the computer's mixer or volume
control, and turning on the appropriate input. You should then be able
to hear the input in real-time through your speakers or headphones.
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