Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.
I understand that English is not everyone's strong language. However, to get some help, the question must be possible for us others to understand.
I try to guess what you may mean and put some info here:
1) Microphone input is nearly always designed for much lower levels than line input or line output. The levels vary depending on the microphone type, and the following values are just some practical examples.
2) Microphone input on a sound card may be 600 ohm, 10 - 200 mVpp
3) Line input on a sound card may be 47 kohm, 0-2Vpp
These values are from Creative SoundBlaster SBI16, but I think they are about same for most cards.
If you feed microphone input with line output you need about 1 /20 (or maybe some more) attenuation. Usually two resistors will do. I would try 6k8 from LineOut-> Mic input and 680 ohm Mic-in -> Gnd. If the level is too much, replace the 6k8 resistor with a larger value one.
But, I am still just guessing what you want to do.... :?
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.