In Stock. 45 Day Lowest Price - 100% Satisfaction Guarantee. The Alesis EC2 96K upgrade allows your existing HD24 to convert and process stunning 24 bit 96K digital audio. The E2 is user installable, and comes with utra high quality converters. When installed, the EC-2 will replace the current converter boards in the HD24 with new boards capable of recording and playing back twelve channels of audio at nominal sample rates of 96kHz and 88.2kHz, as well as 24 channels of audio at standard sample rates of 44.1kHz and 48kHz.