User manual
10 MIXY - User Manual 55 000 057 - B
2.7. SPDIF digital input
MIXY can accept an SPIDF digital audio input on its « Dig. In » RCA socket
(unbalanced, 75 Ohm). This input can be used in two ways (“Inputs” menu):
x
Synchronisation of the digital parts of MIXY, including the A/D and D/A
converters, onto the SPDIF input. MIXY can be operated at any arbitrary
sampling frequency (up to 96 kHz) in such “slave” or “external sync”
mode.
x
Same, but with the SPDIF directly feeding the D/A converter. In this
configuration, MIXY acts as a D/A converter, and the converted SPDIF
signal is fed to all the analog outputs and the USB output.
However, the mix buses are still sent to the AES and Toslink digital
outputs.
2.8. USB interface
MIXY can exchange digital audio signals via its USB interface. The mixer is a USB
“slave” device, providing a 2-channel input/output to a USB host such as e.g. a
laptop computer.
The USB interface operates with a 16 bit resolution and a 44.1 kHz or 48 kHz
sampling rate (under control of the host device).
The received data are converted to analog and can be routed to the mix buses and/or
to the monitoring part (see. 2.5 above). Audio levels are internally calibrated so that
the maximum digital level at the USB input yields full scale at the A/D input when
the USB input is routed to the mix buses. Whenever there is a need to reduce the
contribution of the USB to the mix, this should be done (digitally) from the host
device that sends the USB signal.
In the other direction, the output signal that is sent to the analog outputs is also sent,
after conversion to digital, to the host device via the USB output. The host controls
the sampling rate (44.1 or 48 kHz). No analog level adjustment is needed: audio
levels are internally calibrated so that the maximum output level from the buses
gives a full-scale digital level at the USB output.
When connecting MIXY to a computer (“hot-plugging” is allowed!), it is detected
as a “USB Audio Codec”. This is a generic peripheral driver that requires no
preliminary installation (both for Windows and Mac platforms).