User's Manual

User’s Guide ADI-2 Pro FS - v 2.5

The ADI-2 Pro also shows certain Info Messages during normal operation, to explain the cur-

rent state and to point out possible problems.

In AD/DA and DAC mode, a Non-Audio Channel Status causes the DA section to be muted. An

info message Non-Audio signal at SPDIF input gives a hint why there is currently no analog

audio at the outputs present.

In USB mode, an Emphasis Channel Status brings up the info message Emphasis detected at

SPDIF input. This reminds the user that the Emphasis indication gets lost when recording

through a computer.

On any change of the Basic Operation mode, the new mode is shown for 2 seconds in the dis-

play (Preamp mode active, AD/DA mode active, USB mode active, Dig Through mode active).

When plugging in two connectors into the front with Balanced Phones mode Auto active, Bal-

anced Phones mode active will be shown briefly.

17. Modes

17.1 Auto

The ADI-2 Pro is an AD/DA converter, USB audio interface, USB DAC, analog headphone amp,

format converter and digital monitoring device, with extended flexibility and versatility, equipped

with 5 input sources and 6 output paths. Usually that means an overflowing menu structure and

endless searches in the menus to get it working in even simple applications.

To prevent such frustrating situations the ADI-2 Pro includes an (and ships with activated) Auto

setup mode. When SETUP – Options – Device Mode /DSD – Basic Mode is set to Auto, the unit

will turn into different operating modes depending on the connected cables:

• Preamp: Analog in to Analog out. This mode is active when no digital input signal and no

USB is detected.

• AD/DA: Converter Mode, analog in to all digital outs, digital in to all analog outs. This mode

becomes active as soon as a digital signal is attached. This signal will also become the sig-

nal source. In case more than one digital signal is found the user has to manually select the

source to be monitored. The SRC is active as default and assigned to SPDIF. Clock mode

is slave to AES in, but will adapt to the detected source (Auto).

• USB: or interface mode, or USB DAC. If USB is detected all inputs are routed to USB, all

outputs are fed from USB. USB has priority over the converter mode. In Setup the unit can

be configured as 2-channel or 6/8-channel device.

There are two more modes available, but not via Auto, only by manually activating them. Digital

Through Monitor (automatic clock and source selection of the digital inputs plus internal D to D

routing) allows to insert and monitor AES, SPDIF and ADAT signals. In case of ADAT only

channels 1/2 are monitored, but all 8 channels are passed through. DAC combines clock and

input source selection for easiest operation in home and HiFi usage.

In all modes (except DAC) Phones Out 3/4 is freely configurable, any possible source can be

monitored independently. This includes USB: when selecting one of the above modes manually

all inputs are still transferred to USB, and playback is possible when manually selecting USB as

signal source on analog output 3/4.

The unit remembers all settings, and loads these automatically when it is switched on again.

The following pages show block diagrams and include more details of these modes.