Lyra 2 provides two line input channels and four 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. The input channels have selectable microphone preamplifiers, and selectable high-impedance, unbalanced instrument input jacks. 24-bit conversion is used throughout.
In Lyra 2, 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. A high-quality sample-rate converter (SRC) can be applied to either the stereo digital input or output. The TOSLINK 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 (SMUX mode).
Lyra'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. In Lyra 2, BNC Wordclock I/O is also provided.
Lyra has a dedicated stereo analogue headphone output jack with its own level control.
Under Windows, Lyra can be accessed by any software applications with ASIO or WDM audio capability. Under Apple OS X, Lyra appears as a Core Audio device.
To deal with low-latency requirements in live sound and over-dubbing, Lyra has its own fully-featured mixer for each output channel pair (including the stereo 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. The low-latency mixers can be controlled from suitably-equipped DAW software via ASIO Direct Monitoring ('ADM').
A front-panel volume control can be assigned to any desired analogue or digital outputs, primarily for use as a monitor level control.
Lyra 1 offers a subset of the Lyra 2 functionality - it has only two analogue line outputs, and only a single instrument and a single mic preamplifier, as well as more limited digital I/O capability. The following table details the differences between Lyra 1 and Lyra 2: