C how can I conect my loptop to the mixer so i can play the music from my computer

To connect your laptop to your mixer, first you need to buy a mini plug to 2-RCA cable, like the one in the figure below:



Then connect the two RCA plugs to one channel, using the inputs marked LINE or CD, as shown by the red arrows in the figure below:



Let us say that you already have two CD units connected to channels 1 and 2. Connect the cable mentioned above to the two RCA jacks of Channel 3.

Now, connect the mini plug to the sound output of your laptop (it should be merked LINE OUT, PHONES or have the symbol of a phone close to it). If the output is dinamically addressed, i.e., the sound driver pops up a windows asking what have you connected to that input, please mark the answer that indicates LINE OUT or HEADPHONES (or something related, but not LINE IN or MICROPHONE).

Adjust your laptop volume to LOW. Switch on your mixer, select the channel you connected the laptop and increase its volume. Put a song in your laptop to play and raise its volume little by little, till you have a good level of sound with no distortion

A word of caution: If you adjust the laptop volume to maximum, distortion could occur, so experiment with the laptop volume to find the best level.

Hope this info may help you!

You need an adaptor cable to go from the 3.5mm headphone jack on your laptop to the RCA inputs on the mixer, specifically a male stereo 3.5mm to dual RCA male adaptor like the one shown at this link, this can be found at almost any electronics department,i.e. target, best buy, walmart, radio shack, etc..
http://www.amazon.com/3-5mm-Stereo-Male-Splitter-Cable/dp/B0016LFN2C/ref=sr_1_1?s=electronics&ie=UTF8&qid=1301620460&sr=1-1