I cant get the djio to play through my mixer - Numark DJ/iO Sound Card

Sounds to me like either an open wire or a blown speaker. I would highly recommend not operating it until it is fixed before you blow the amp. Tapping a 9V battery across the speaker (disconnected from amp) will cause a noise in the speaker, if not it is a broken wire or bad speaker. Good Luck

Go here and download the driver for your OS and install it :

http://www.numark.com/product/djio

The switch that the button actuates is probably broken. The unit will need to be serviced.

web site http://www.numark.com/djio?tt=5

Are you using a Mixer as a pre-amp for this set-up? For example, I have a Numark CM200 where I have all of the inputs and outputs I need to run. DJ IO is connected to Chanel 1 and Chanel 2 Lines in my mixer. The DJ IO is conected to my computer by USB cable. In Traktor souncard settings chanel 1 is set to (3&4) Chanel 2 (2&1) also, devise set up is Numark DJ IO and in External mode. Of course the mixer is conected to my amp and speakers conected to the amp as well.

try using it from another computer

try this site www.numark.com/djio

you did not mention that you have a power amplifier to drive your Speakers. well you need to have one unless you have a powered speaker. the sugnal comes from the mixer main output goes to the input of your amp. or powered speaker.

master 1/2 hedphones chane 3/4

well i would sugest that it is just a minor problem but depends how old your midi mixer is try updating that may solve problem