Atlas provides eight line input channels and eight line output channels, which can be operated in balanced or unbalanced mode, and each of which can be used with professional ('+4dBu') or consumer ('-10dBV') signal levels. All eight input channels have selectable microphone preamplifiers, and two of these also have high-impedance, unbalanced instrument input jacks. 24-bit conversion is used throughout, and sample rates up to 192kHz are supported.
Stereo digital I/O is provided in both S/PDIF and optical (TOSLINK) formats. The S/PDIF input can also accept professional AES3 signals, and the S/PDIF output can be switched to AES3 mode if required. The optical connectors can alternatively carry eight channels of ADAT I/O at 44.1k or 48kHz sample rates, or four channels at 88.2kHz or 96kHz. A high-quality sample-rate converter can be assigned to the S/PDIF input or output if required.
Atlas has a dedicated stereo analogue headphone output, with two stereo headphone jacks, each with its own level control. MIDI input and output are also provided.
Atlas incorporates the new Prism Sound MDIO (multi-channel digital IO) expansion slot, which allows additional and future host interface formats to be accommodated.
Under Windows, Atlas can be accessed by any software applications with WDM (Windows) or ASIO capability. Under Apple OS X, Atlas appears as a Core Audio device.
To deal with low-latency requirements in live sound and over-dubbing, Atlas has its own fully-featured mixer for each output channel pair (including digital, ADAT and headphones). When selected, each mixer allows a low-latency mix of any input channels (as well as the output's associated workstation feeds) to be sent to the required outputs. Additionally, each output can be switched to follow the output of any other output's mixer.
A front-panel volume control can be assigned to any desired analogue or digital outputs, primarily for use as a stereo or surround monitoring control.
Atlas's sample rate (44.1kHz, 48kHz, 88.2kHz, 96kHz, 176.4kHz or 192kHz) can be sourced from its high-stability internal clock, or locked to the stereo digital or ADAT inputs or the BNC Wordclock input. Clock output is via the S/PDIF output and the BNC Wordclock output (which can also be set to Baseclock or Superclock modes).