Have bought two of these audio extractors in the last few years and both are used for iPad karaoke, first bought two years ago and another recently Week. I use the Karafun and Stingray Karaoke iPad apps for karaoke, and with the official Apple MD826ZMA Lightning to HDMI Adapter, you can use these apps to queue up karaoke songs from the tablet while the karaoke is showing. Text to the HDMI output port. Cheaper unofficial adapters don't seem to work as well, and that's when they work at all (this is an area you'll want to keep in the official Apple family of products). This adapter works very well for KaraFun as you can search for songs, see lyrics and maintain a queue while someone sings from a large TV (Note: although an iPad 4 will work for playback, you'll need a more powerful iPad to get more in a time to do than playing lyrics on a big TV). big screen, something like an iPad Air 2 or better). The Stingray Karaoke app for iPad works a little differently, but you still get karaoke lyrics on a big-screen TV for the current singer (and it's only $60 a year to access). their entire library, although you sign up on the website and not the app so you can use the account on more than just the iPad!). By the way, with the two apps, you have almost 50,000 professional karaoke songs at your fingertips! Had the problem that when plugging the mixer into the headphone jack on an iPad with the HDMI adapter attached, the sound often gets lost. or worse, out of sync with the lyrics! The solution was to mute the audio from the iPad's HDMI port and this box is perfect for that! Not only is the video resolution supported by the set-top box not an issue (HDMI output is only available in HD or lower), but the ability to switch to 2-channel audio means we only send 2 channels of audio (left and right) to the mixer. So the connection is made like this: the Apple Lightning to HDMI Adapter is connected to the iPad and a short HDMI cable is connected between the HDMI input port of the Wiistar HDMI Audio Extractor and the HDMI port of the Apple adapter. . The Audio Extractor's HDMI output then connects to a big screen TV (or an HDMI breakout box that sends video to multiple TVs simultaneously if required). The Wiistar HDMI Audio Extractor headphone jack is then connected to the mixer (the switch on the Wiistar box is set to 2 channels). Both the Apple adapter and the Audio Extractor are USB powered, so I use a 2-port USB adapter of at least 2000mAh capacity or more (although you can use separate USB power supplies if you want, but with a dual port only one wall outlet is needed). Now I haven't used them for optical or coaxial output and can't comment on that, only the audio output through the headphone jack which worked great for me. The downside to using it in apps other than iPad is that it only supports video up to 1080 and not 4K. So if you want to use it for a 4K app (like the Revain 4K Fire TV), you'll have to watch other audio files extract or settle for the max 1080 HD resolution.
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