A few weeks back I did a little demo of the Mixfader , a bluetooth crossfader that let you scratch with nothing else than an iPad or an iPhone. Well, the crossfader showed no latency at all, and it's one of the best crossfader you can get on the market right now especially for scratching, and I had a lot of fun using it with my iPad. The only problem that is on the iPad side, it's not super ideal to scratch on the iPad, and you fingers become pretty sticky after a while, so it's a lot of fun, but not really usable for a professional performance. But there is an other possibility: plug a turntable to the iPad and then you can really have a lot of fun. You can plug a Technics MKII or any turntable if you want and use control vinyls like Serato or Traktor ones to send timecode information to the edjing Scratch app But since for me, I thing it's a portable solution that let you scratch wherever you want (On the road at the beach, at some friends, on the streets ;-)), I decided to use the Vestax Handytrax! So, all you need is: - a mixfader: http://www.themixfader.com - a tablet: any iPad or Android tablet works - the edjing Edjing Scratch app: free on the App Store or Google Play - a RCA to USB soundcard: there's ton of cheap ones on Amazon, I did get a V.TOP to less than $15: https://www.amazon.fr/gp/product/B00XU4NT6K/ref=oh_aui_detailpage_o05_s01?ie=UTF8&psc=1 - for iOS, a lightning to USB Camera adaptor (I have not checked for android sorry) https://www.amazon.fr/Apple-MD821ZM-Lightning-Camera-Adaptateur/dp/B009WHV3XA/ref=sr_1_3?s=computers&ie=UTF8&qid=1463654899&sr=1-3&keywords=lightning+usb - a 7" Serato Control vinyl /// well Serato does not produce them anymore, I know some people create them themselves from a 12" and some cutter skills, but I found a website that do sell homemade ones from Open Format: http://openformat.la/shop/serato-control-vinyl-7/ - 7" slipmats: I get mine while in NYC at Turntable Lab and once again DR. Suzuki's ones are the best you can get http://www.turntablelab.com/products/stokyo-dr-suzuki-x-technics-7-slipmats-pair That's it, that's all. I have a lot of fun using the MixFader in DVS mode, there's a lot of possibility. With just my iPad I have access to my whole music library, so possibilities are endless!