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popcod
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Posts: 6
Registered: ‎11-30-2011
Location: United States
Views: 2,749
Message 1 of 6

T420: Simultaneous Audio Output from Laptop and Dock Jacks

I own a T420 with the Advanced Mini-Dock Series 3. Could anyone tell me whether it's possible to configure the audio settings to use 2 sets of speakers simultaneously (one plugged into the headphone jack on the laptop, the second plugged into the jack in the dock)? If so, how would I go about doing this in Windows 7?  I tried to go into SOUND in the control panel to set the dock jack to default (in the Playback tab), but this option is greyed out (the device shows up as "not plugged in" yet "working properly" despite the fact that I have speakers plugged in and they work fine on their own).

 

edit: To clarify, I currently get audio from either jack independently.  The problem is that the dock audio goes silent when I plug into the laptop jack. 

Guru
Posts: 9,598
Registered: ‎12-26-2009
Location: CA
Views: 2,730
Message 2 of 6

Re: T420: Simultaneous Audio Output from Laptop and Dock Jacks

Load Conexant SmartAudio. In one of the tabs, there should be an option for multistream (instead of classic stream). Choose that, and every device should show up independently.

W520: 2960XM, Q2000M @ 1091/1380, 32GB RAM, 500GB&750GB HDD & 500GB SSD, FHD&MB168B+
X61T: L7500, 4GB RAM, 500GB HDD, XGA screen, Ultrabase
W550s: 5600U, K620M at 1164/1281, 16GB RAM, 512GB SSD, 3K touchscreen
X200s: SL9400, 6GB RAM, 64GB SD card, WXGA+ screen
TPT1: 1839-23U
popcod
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Posts: 6
Registered: ‎11-30-2011
Location: United States
Views: 2,726
Message 3 of 6

Re: T420: Simultaneous Audio Output from Laptop and Dock Jacks

Thanks for the tip. I tried this, but the soundcard still gives preference to a *single* output (whichever I have set as default in the Playback tab) rather than distributing the sound - this despite having unchecked "allow applications to take exlclusive control of this device" in the advanced tab under properties for each device. I've found a workaround for Winamp, a plugin that allows me to multiply audio outputs, but isn't there some way to set Windows or conexant to always use multiple default outputs at the same time?

Guru
Posts: 9,598
Registered: ‎12-26-2009
Location: CA
Views: 2,713
Message 4 of 6

Re: T420: Simultaneous Audio Output from Laptop and Dock Jacks

One audio stream will exit via one output. That's how it works.

I presume that's because there's generally no reason to have it distribute the same audio to two jacks.

W520: 2960XM, Q2000M @ 1091/1380, 32GB RAM, 500GB&750GB HDD & 500GB SSD, FHD&MB168B+
X61T: L7500, 4GB RAM, 500GB HDD, XGA screen, Ultrabase
W550s: 5600U, K620M at 1164/1281, 16GB RAM, 512GB SSD, 3K touchscreen
X200s: SL9400, 6GB RAM, 64GB SD card, WXGA+ screen
TPT1: 1839-23U
popcod
Fanfold Paper
Posts: 6
Registered: ‎11-30-2011
Location: United States
Views: 2,709
Message 5 of 6

Re: T420: Simultaneous Audio Output from Laptop and Dock Jacks

I don't see why you say "that's how it works", since this option is available in XP.  And the soundcard is clearly capable of simultaneous output from multiple jacks, as demonstrated by Winamp when equipped with proper plugins (as well as the conexant sound test).  Also, there are *countless* reasons for wanting to have the same audio issuing from two different jacks (particularly if one works in a recording studio).  In my case, I had an old pair of speakers around and noticed that sound improved dramatically when using these in tandem with a newer, nicer set (the left speaker of which had died).

Guru
Posts: 9,598
Registered: ‎12-26-2009
Location: CA
Views: 2,698
Message 6 of 6

Re: T420: Simultaneous Audio Output from Laptop and Dock Jacks

My bad; I meant that's how it's supposed to work.

So XP on the same machine offers the necessary setting?

The Winamp + plugin is a workaround. I think the general assumption is that one would have a splitter after the audio exits the machine, and that one would only be expecting to use one set of speakers.

W520: 2960XM, Q2000M @ 1091/1380, 32GB RAM, 500GB&750GB HDD & 500GB SSD, FHD&MB168B+
X61T: L7500, 4GB RAM, 500GB HDD, XGA screen, Ultrabase
W550s: 5600U, K620M at 1164/1281, 16GB RAM, 512GB SSD, 3K touchscreen
X200s: SL9400, 6GB RAM, 64GB SD card, WXGA+ screen
TPT1: 1839-23U

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