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Soulo Karaoke by First Act Inc. and Seven45 Studios $69.99 for wired microphone; $99.99 for wireless version at soulo.com Here comes New Year’s, the rowdy, raucous holiday that’s perfect for karaoke, especially if you got an iPad for Christmas. All you need is Soulo, a software-hardware combo created by a pair of Boston companies, First Act Inc. and Seven45 Studios. Soulo that turns the iPad into a karaoke machine.