24I/O Overview

The MOTU Audio 24I/O interface fulfills the promise of host-based hard disk recording: to record, edit, mix process, and master multitrack recording projects entirely inside the computer. It provides 24 high quality, 24-bit/96kHz analog inputs and outputs in a cost effective, single rack space package, allowing you to connect and record from 24 simultaneous analog sources.

The 24I/O can be purchased as an expander for an existing PCI-424-based MOTU Audio System, or as a core system which includes the PCI-424 card and Audiodesk workstation software.

http://www.motu.com/products/pciaudio/24IO/body.html

Specifications

24 analog inputs/outputs with 24-bit, 96kHz converters on balanced/unbalanced 1/4" TRS connectors
16, 20 and 24-bit recording at 44.1, 48, 88.2 and 96 kHz
ADAT sync input on PCI-424 card
Word clock
Includes cross-platform PCI-424 card
Chassis dimensions, excluding rack ears and front and back panel knobs and connectors: 19 × 7 × 1.75 inches (48.26 × 17.78 × 4.45 cm). Knobs and connectors extend up to 0.5 inch (1.27 cm) from front and back panels, adding 1 inch (2.54 cm) to depth. With rack ears attached, fits standard 19 inch (48.26 cm) rack at 1U high.

Full system requirements: PCIX-424 card, PCIe-424 card

Feature Summary

Expandable — connect up to four 24I/O units to a PCI-424 audio card for a total of 96 inputs and outputs. Use as many simultaneous channels as host software and computer allow.
100% compatible with all MOTU AudioWire interfaces. Mix and match MOTU audio interfaces (up to four at once) to meet your exact I/O needs.
Drivers for Mac OS X and Windows — provides multi-channel 24-bit I/O for all leading audio software on both computer platforms.
Word clock — resolves to time code or any other external time base via MOTU's Digital Timepiece synchronizer or any other standard digital audio synchronization device.
Resolves directly to SMPTE time code (LTC) with fast lock-up and sub-frame accuracy.
DC-coupled TRS outputs — can be used with Volta™ (sold separately) to manipulate and sequence voltage-controlled modular synthesizers from a host DAW.

CueMix DSP™

The PCI-424 card features a powerful DSP chip dedicated to creating a custom tailored monitor mix of up to 96 channels of 96kHz audio. Because the mixing takes place on the card itself, instead of making the round trip from the PCI bus to the host processor, the system provides the same near-zero latency performance as today's latest digital mixers. CueMix DSP completely eliminates the buffer latency associated with monitoring on host-based systems. Because the DSP is mixing for you, your computer's CPU is free for other tasks.
Cuemix DSP is the most flexible Cuemix ever, allowing you to mix multiple channels into multiple mix busses or directly assigned outputs. Manage your monitor mix with the intuitive Cuemix Console software included with the 24I/O.
Cuemix console greatly now provides independent level and pan controls for each input on every mix. Also, CuemixDSP does not limit you to four stereo mixes. You can configure a unique mix for every physical stereo output you have available. This means you can have up to 48 separate stereo mixes on a 96 output system.
Any MOTU Audiowire interface plugged into the PCI-424, including the original 2408, can take advantage of Cuemix's flexible monitoring.