Audio processing and mixing happens via Serato ITCH software.
These are all-in-one mixing control surfaces with audio input and output connections. ITCH DJ Controllers with internal audio mixing Link to their page and text below from their site Serato Itch uses quite a few controllers too. I use Serato Itch too - but I chose the Vestax VCI-300 controller. Can someone tell me what 'Dirtual DJ' is? Does it come with dirt jog wheels?
