Ayne said:Circuit Diagram has been changed accordingly..
**broken link removed**
But in my view,(need ur guidence)
Soundcard output impedence is low and our preamplifier input impedence is enough high. This impedence mismatching will cause the noise.. Am i right!!!.
No, it's how it should be - you don't want impedance matching, it's a BAD thing! (exept for certain specific purposes).