Please test a sample track and ensure you don't need to adjust the audio or video latency before going any further. You can also use the official Singstar microphones - note that they will provide their own USB soundcard, so you'll have to specify USDX not to use your system's default sound card for input - more info here. Before that, check they are correctly working from your OS they fire up USDX and set them up in the preferences. Sound input: you'll want to set up your microphone in UltraStar preferences. Sound output: should be already set up, but if you have specific needs, fill them in! You'll need to pay attention to a few things here: You'll also be able to use it to set up your audio system. Try installing a sample test song to sort things out. Songs consist actually of subfolder, each of which containing a few files: the music, the background elements, and the lyrics themselves. You'll find a /songs/ subfolder here, that's where you will want to place your karaoke library (by simply copying over the files). Ultrastar DX songs are located, by default, in its installation folder.
Once installed, there are two things to consider: configuring your song library, and configuring your audio system (microphones, and eventually extra sound cards). Ubuntu 12.04 users, please not that USDX has not been yet updated to use the newest version of ffmpeg and therefor will not work on your system (or at least, not without hassle) please use Performous instead till then. Head to the download page and pick the release fitting your OS. I have derived several Ultrastar covers from original work published on Flickr (credits are given below) and share them again under Creative Commons – have fun! Yass works well with Ultrastar, an open-source karaoke game, and the offspring Ultrastar Deluxe.