allows you to control pitch, scratching, and transport functions of the S4 via analog turntables or CDJs
upgrade kit includes TRAKTOR SCRATCH PRO 2 software plus 2 timecode vinyls / 2 CDs
does not require the TRAKTOR AUDIO 10 interface, since you connect your turntables & CD decks to the S4 audio inputs
PRICE: $139 /129 €. Available April 1, 2011. Note: If you own both the S4 AND a digital vinyl system from NI (TRAKTOR SCRATCH, TRAKTOR SCRATCH DUO / TRAKTOR SCRATCH PRO), you will receive a free SCRATCH UPGRADE.
I would be careful with getting Duo, It’ll be watered down in version 2 as well and you may end up paying more in the end. If I was going to do something like that it would be find a TSP for what I’m guessing will be $300-$350 once the new software is released. Then if you take the $140 out you would have paid for the S4 upgrade to TSP2 your only spending $160-$210 for a perfectly good Audio 8 as a backup/extra soundcard.