2
\$\begingroup\$

Sorry for my english i'm a young french.

I want to design an audio transmitter to connect my pc to my Hi-Fi without Jack cables.

For now i just want to send a mono signal because sending a stereo seems to be too complicated and i don't need it.

The problem is that my PC's output is a stereo jack. So is it correct to merge the two signals in once, using an operational amplifier in buffer or summing ? Will the sound be ok, just suming two signals ?

Thanks

\$\endgroup\$
  • \$\begingroup\$ I don't think Aspect Oriented Programming is appropriate for audio signals... \$\endgroup\$ – Brian Drummond Jun 25 '15 at 9:42
3
\$\begingroup\$

You don't really need an opamp. You can do it easily enough this way:

Passive Mixer

This will sound fine although the volume level will be lower than normal -- so you will likely need to turn up the volume knob on your Hi-Fi.

\$\endgroup\$
  • 2
    \$\begingroup\$ Suggest R3=47K pot, R4=0... \$\endgroup\$ – Brian Drummond Jun 25 '15 at 9:43
  • \$\begingroup\$ I agree with @Brian (FYI) \$\endgroup\$ – DrFriedParts Jun 25 '15 at 10:00
  • \$\begingroup\$ @BrianDrummond why 47K pot only ? \$\endgroup\$ – MaMba Jun 25 '15 at 10:20
  • \$\begingroup\$ With R4 > 0, you can't fade right down to 0 volume. Other values will work if that doesn't matter. \$\endgroup\$ – Brian Drummond Jun 25 '15 at 10:28
  • \$\begingroup\$ @Brian But he's connecting to a Hi-Fi system so it would have final output authority, no? I'm thinking the pot is just for level adjustment to prevent saturating the Hi-Fi input. \$\endgroup\$ – DrFriedParts Jun 25 '15 at 23:39

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.