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plug in sound from usb tv box, into laptop mic input?

Jesus Angeles
Ranch Hand

Joined: Feb 26, 2005
Posts: 2057
my new laptop only has mic and headphone.

i need to plug the output sound of the usb tv box into the laptop.

so far, i tried plugging into the mic socket, but there is no sound.

to test if a sound is indeed being passed, i connected the output of usb tv box directly to a separate sound system, and there is a sound.

i cannot plug into the mic, as if it is a 'line in' socket?
Jesus Angeles
Ranch Hand

Joined: Feb 26, 2005
Posts: 2057
yes, the laptop is already powered on

any ideas will be appreciated.

i also tried inputting output of a pocket radio(where i plug headphone) into the 'mic' socket and there is no sound going in to the pc.

also the mic socket works if i plug in a microphone.

any ideas?
Aalok Pandit
Greenhorn

Joined: Sep 26, 2005
Posts: 15
hi

the mic-in socket is a mono-socket, however the output of a tv box or a radio set is essentially stereo.

you'll need a stereo to mono converter before you can plug your tv sound into laptop.


hope this helps!!!
Jesus Angeles
Ranch Hand

Joined: Feb 26, 2005
Posts: 2057
Originally posted by Aalok Pandit:
hi

the mic-in socket is a mono-socket, however the output of a tv box or a radio set is essentially stereo.

you'll need a stereo to mono converter before you can plug your tv sound into laptop.


hope this helps!!!


Is this converter something that has electronic stuff(transistor,capacitor,whatever) in it, or just a simple plug converter(like a small adaptor with connectors on both ends)?

I bought a simple plug converter, with female endpoint for stereo, and male endpoint for mono, but it didnt work.

I saw some electronic stuff on the web that looks like is doing some electronic processing to convert the signal.

I am not sure which one I need. The first one didnt work.
fred rosenberger
lowercase baba
Bartender

Joined: Oct 02, 2003
Posts: 11479
    
  16

well, i'm digging into stuff i haven't thought about for years, but here's what i think...

you don't need an adapter to go from stereo to mono. basically, on a stereo plug, there are three contact areas - the tip, a small collar, and then the base of the jack. i don't know which is which, but one is the left, one is the right, and one is the ground. when you plug it into a stereo input, there are three contacts inside that touch each part.

if you plug a male stereo into a female mono, there should only be two contacts in the female jack. one should still hit the neutral, and one should hit either the left or right. it might not sound pretty, but you should get SOME sound.

i think the problem is that a mic's signal is MUCH lower than a line-level, as your ouput from your source should be. in other words, the mic input is expecting a much lower signal strength than what your giving it.

now, i'm not sure if your computer is shutting things off since the voltage coming in is too high, if you've (possibly) damages it, or something else, but i really doubt you can get it to work, without something to drop the signal strength down.
[ July 22, 2006: Message edited by: fred rosenberger ]

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