All,
I have a project I've been working on on and off for the last year or so, and I can't seem to figure out what's up. I'll admit right now, I'm a bit of a hack when it comes to this stuff, but I find it extremely entertaining/fun.
I play computer games with a friend, and we talk on the phone at the same time (rather than using Skype, or the like). I want to be able to wear my nice headphones, and use a mic as well, and be able to hear the phone conversation, and the computer through my headphones.
I've designed a schematic using the info on this page: http://rane.com/note109.html by combining his design for a combiner, and a stereo to mono combiner linked together.
My design is attached.
So, there are two issues. The big one at this point is that the person on the other end of the phone convo gets a bit of echo of their voice back. From talking to someone else, sounds like some caps (22µF or so) in the circuit would help with this. Not sure where they would go. Maybe on the computer input? Any thoughts?
The second is that, the computer is much louder than the phone even when the computer is turned way down, and the phone way up. Guessing this is just because the computer can drive far more than the phone. Any thoughts on how to adjust this? I was thinking something like a stereo potentiometer (like this: http://www.parts-express.com/images/products/standard/023-646_s.jpg) that adjusts the balance between the two sources, but not sure how well that would work.
Anyway, any help would be greatly appreciated. I'd really like to get this built. My initial breadboarding has been very promising, I just want to work out these couple bugs.
Thanks!
I have a project I've been working on on and off for the last year or so, and I can't seem to figure out what's up. I'll admit right now, I'm a bit of a hack when it comes to this stuff, but I find it extremely entertaining/fun.
I play computer games with a friend, and we talk on the phone at the same time (rather than using Skype, or the like). I want to be able to wear my nice headphones, and use a mic as well, and be able to hear the phone conversation, and the computer through my headphones.
I've designed a schematic using the info on this page: http://rane.com/note109.html by combining his design for a combiner, and a stereo to mono combiner linked together.
My design is attached.
So, there are two issues. The big one at this point is that the person on the other end of the phone convo gets a bit of echo of their voice back. From talking to someone else, sounds like some caps (22µF or so) in the circuit would help with this. Not sure where they would go. Maybe on the computer input? Any thoughts?
The second is that, the computer is much louder than the phone even when the computer is turned way down, and the phone way up. Guessing this is just because the computer can drive far more than the phone. Any thoughts on how to adjust this? I was thinking something like a stereo potentiometer (like this: http://www.parts-express.com/images/products/standard/023-646_s.jpg) that adjusts the balance between the two sources, but not sure how well that would work.
Anyway, any help would be greatly appreciated. I'd really like to get this built. My initial breadboarding has been very promising, I just want to work out these couple bugs.
Thanks!
Attachments
-
29.5 KB Views: 76