Only one channel outputs on the earphone jack and USB

Wed, 2016-02-24 11:43 by Karol · Forum/category:

I have a Lenovo IdeaPad S400, WIN 7, built in Realtek sound card.
on the internal speakers it's fine, but on the 3.5mm jack, and also from an external USB sound card it seems that onle one channel, the L or R, is playing

Only one channel outputs on the earphone jack and USB

Wed, 2016-02-24 16:39 by admin

If you had not mentioned that an external USB sound adapter exhibits the same problem, I would have guessed a hardware defect. But if two different sound adapters have the same problem, it could be a wrong setting somewhere.

You could try to right-click the speaker symbol in the notification area (formerly system tray, normally lower right), select the sound output devices, and check the settings. You probably want stereo sound. The function also offers a test sound.

With the jack both speakers

Thu, 2016-02-25 14:37 by Karol

With the jack both speakers play the same, probably mono but on the Realtek panel the stereo option is greyed and it's the only one. this happens playing music from MediaMonkey even with the volume control is only on one side, for example Right channel. but when testing from Realtek, only that speaker plays, for the above example the right one.
And the music is strange. when the control is on one side, let's say R, the sound on both speakers is fine and the same, not stereo, but when i drag the volume control through the 0 balance-the music is missing something, apparently only then only one channel plays. continuing to slide the control to the other side, the L channel, it's back good and the same like on the R side.
This behavior is slightly different on the external USB sound card. i have no control on the volume output to the sides and i only hear bad like it's in the middle of the range, the 0 position of the balance control.

Player problem?

Sat, 2016-02-27 08:56 by admin

Which program do you use to play music?

Check its settings or try a different player. It could be that something is wrong in the player.

Try foobar2000 for sound/music and Media Player Classic Homecinema for video.

There is a problem also with Skype

Sun, 2016-02-28 05:35 by Karol

Problems hearing, and the solution i have found-sliding the balance to one side and hearing, apparently, mono, works also for Skype.
I use Mediamonkey and it never made problems on other computers.
The problem persists with Foobar2000

Out of ideas

Mon, 2016-02-29 11:25 by admin

I'm out of good ideas on this one. I am thinking of one channel being reversed, so the two channels cancel each other out, but that alone does not quite explain the phenomenon.

Think about taking the computer to a repair shop and demonstrating the problem to them. This is difficult to diagnose from far.

Good idea

Tue, 2016-03-01 17:17 by Karol

The channel reverse seems to me, it can explain, i think.
Tell me more and where to find info about that, please. is it a software problem of WIN 7? what's the go-around, if there is?
I thank you for your replies, no other forum answered me

Out of ideas

Wed, 2016-03-02 07:12 by admin

The reversed channel was just a hunch, because they seemed to cancel each other out. I don't think that is a software problem. A wiring error could explain the signal reversal, but it would still be difficult to explain any cancelling on two separate stereo channels coming out of two different speakers. There would be no cancelling, unless the signal is also combined in mono fashion, and that would be even more difficult to explain. It would mean two different wiring errors at the same time. I am merely speculating here.

Your problem is probably a different one anyway, and I cannot come up with any credible idea, other than to seek help from somebody who repairs computers professionally. Sorry.

Thank you very much for your replies

Mon, 2016-03-07 05:30 by Karol

I thank you for your efforts to help. i didn't receive any reference in any other forum, thanks

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