One can purchase DJ mixers are a number of different locations.
There is software available on the DJ Today site that is not very
expensive and used by many people.
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Guitar Center - check out their website guitarcenter.com
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Audio mixers are used by DJ's for changing the sounds of music
and songs. You can buy them from music retailers and also on
general online stores like Amazon.
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mixer is when you ix the music only but he dj amp i for all the
gear like speakers mixers turntables and stuff.............