What type of sound cards are they? Its best to move your microphone in another quite room to do your recording.
This will help eliminate unwanted sounds .Condesent mics are very sensitive . If your recording from a tape player the condesent mic will pick up the sound of the tape drive motor .Your better off putting only the speaker and the mic in the quite room.
The quite room will give you the best results if your recording your own voice or instruments.Good luck
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