Line in to phone?

[XPCportables]

How many times have you wanted to let someone on the phone hear a song or some dialog from a sound clip, but they can't tell what is being said because the sound quality is so poor?

Well it happens to me all of the time. So I decided that I would make a line in cable for my phone. I have an old headset for my phone, and I want to replace the mic with a 3.5" plug so that I can hook it up to my pc or mp3 player and input the sound directly to the phone.

My question is, will this work? am I forgetting something?

[bicostp]

You might have to either turn down the volume or add a resistor, since microphone level is a lot less than line level audio. ...right?

[project_failure]

You might have to either turn down the volume or add a resistor, since microphone level is a lot less than line level audio. ...right?

Not necessarily, I used a spliter on my speaker out on my pc. one pluged into my speaker the other into the mic port. I played something and recorded it at the same time. Then when i played the recording the recording was noticeably louder.

[Limewater]

My question is, will this work? am I forgetting something?

If you make this work, it will sound better than it did before, but it will still sound like crap.

Analog telephones only have about a 4 kHz bandwidth, passing something like 400Hz to 3800 Hz (I don't recall exact numbers and they depend slightly on the quality of the line you get). That's pretty narrow.

But then again, I guess the music they play when you're on hold is almost intelligible.

[Limewater]

You might have to either turn down the volume or add a resistor, since microphone level is a lot less than line level audio. ...right?

Not necessarily, I used a spliter on my speaker out on my pc. one pluged into my speaker the other into the mic port. I played something and recorded it at the same time. Then when i played the recording the recording was noticeably louder.

That actually was what he was saying.

Mic-in expects a low signal level, so when you send a line-level signal you should expect it to be louder and over-driven sounding.

[XPCportables]

well I finished line2phone cable mark I, and it is working great. I still have the mic connected to the cable and as expected the mic will not receive any sound while the line in is connected to a audio source. So my question is, is there any way that I can get both running at the same time?

[Felino]

Nope.