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I am trying to set up DJ equipment for small/medium sized rooms (See previous question for background).

My equipment is going to be as follows:

  • Laptop(s), iPad(s) playing music (No CDs No Vinyl)
  • Powered Speakers

Do I really need a Mixer if I have an external sound card?

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migrated from avp.stackexchange.com Jan 27 at 15:12

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Is this asking anything different to your earlier question at avp.stackexchange.com/q/4007/674 –  Rory Alsop May 23 '12 at 7:34
    
@DrMayhem, that question was going the other way - do I need more equipment. I'm trying to see if less equipment can work. –  Raj More May 30 '12 at 10:09
    
No worries. The answers here look like providing good info. –  Rory Alsop May 30 '12 at 10:51
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2 Answers 2

How are you using the external sound card/audio interface with the iPad(s)? A better answer will require a more detailed explanation of our setup, including model numbers or at least what kind of connectors each component provides.

The simple answer is if you can plug source A into speaker B and it works well enough for you without a mixer, then no you don't.

If you only had a single laptop, I would imagine your external audio interface would have a decent volume knob and the appropriate pro-quality connectors (likely TRS 1/4") to supply your powered speakers, so you wouldn't need a mixer.

You only really need a mixer if you have two distinct audio sources that you need to balance. If you are using multiple laptops and iPads simultaneously and don't want to fiddle with cables when you switch between them, then yes, you will probably need a mixer with enough stereo channels to handle each of your sources.

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This is in a DJ context, so I'm presuming you're talking about a DJ-style mixer with a crossfader, rather than a more traditional line mixer.

You've got at least two audio sources (at least one laptop, at least one iPad), so if you want to play them at the same time, you'll need some kind of mixer.

However, if you plan to play only one device at a time (presumably switching the cable from one to the other) then the only reason you'd need a mixer is if you want to use some specific feature of that mixer for your performance. You could, for example, put the laptop and the iPad on either side of the mixer, and alternate playing songs on each one while using the crossfader to blend/cut between them.

However, you may be using DJing software that is handling this, and if that's the case, then the mixing is already done in software and no hardware mixer is necessary.

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