Computer audio to sound board?

[Chad]

We have a new children church program were we run PowerPoint and need to run audio from our computer through the headphone jack to our sound board. When i hooked up the 1/8 jack on the computer to the 1/4 on the sound board I go a nice hum. Any idea how to get rid of it on the cheep?

[Chad]

Our children church uses PowerPoint so we need to get sound from the PC to the sound system. When i hook the 1/8 headphone jack to the 1/4 input on the sound board i get a hum. Any idea on how to fix it on the cheep?

[Frank DeWitt]

The easy way is to use a DI box. PC to DI box with the cable you are using now. DI box to sound board with a microphone cable. OR if the PC is a laptop, unplug it.

Frank

[sien]

The rolls buzz off retails for about US$53.

[hoosierdraft]

Here is always my solution:

Whirlwind PCDI

Cures alot of interface issues including hum.

[[Director] drew ryan]

You could also look at an external audio interface. if you Google that you will get a lot of options.

[yeshua]

Have you tried swapping out that 1/8 -1/4 adapter? tried plugging in some regular earphones? sounds like the noise could be a contribution of a bad plug somewhere....otherwise try a DI, most people have a few hanging around, if you don't have an extra one, run to a nearby store and just pick up a cheap one...I like the art stuff personally (since trend is me need something, me buy something....) its treated me well...I've got 2 of these http://www.artproaudio.com/products.asp?type=90&cat=13&id=104
you could also try something like this that meant for AV stuff http://www.artproaudio.com/products....&cat=13&id=131

I run both my laptop and the ProPresenter imac from 1/8 - stereo RCA's and a 1/8 - 1/8 extension - 1/4 (the port on the mixer has RCA's and a XLR/1/4 combo jack...this way I only use one channel out of my 8 for computers...)

[[Director] drew ryan]

In the ART sutff, this would also be and interesting piece. http://tinyurl.com/3hgl7da

[[Admin] osborn4]

We went with both a USB audio interface AND a good stereo DI box. Sounds great, but not cheap.

[Frank DeWitt]

Originally Posted by osborn4

We went with both a USB audio interface AND a good stereo DI box.


Sounds great, but not cheap.

Sounds good but not cheap usually go together. It is a good thing when the overall system is at a point that you can hear the difference between DI Boxes.

[tropicalfish]

Don't ever use a 1/8" to single 1/4" adapter. You'll be running stereo to balanced and you'll lose anything that's center panned.

You'll want something like this: Amazon.com: Hosa CMP153 Y Cable 1/8 Inch TRS to...
And to get rid of the hum, just use a DI box and ground lift. If you have only one, use the left channel.

[Frank DeWitt]

Originally Posted by tropicalfish

Don't ever use a 1/8" to single 1/4" adapter. You'll be running stereo to balanced and you'll lose anything that's center panned.

You'll want something like this: Amazon.com: Hosa CMP153 Y Cable 1/8 Inch TRS to Dual 1/4 Inch TS Cable - 3 Foot: Musical Instruments

And to get rid of the hum, just use a DI box and ground lift. If you have only one, use the left channel.

You can build a Wye adapter with 3 resistors. Here is a link
http://www.rane.com/note109.html
I added a 1/8 stereo jack to my DI box with this ckt. (It is disconnected when a 1/4 in plug is used.

Frank