User Manual
Introduction
 Owner’s Manual
7
Introduction
Thank you for choosing the Yamaha 
Rio3224-D2/Rio1608-D2 I/O Rack. This product is a 
Dante-compatible I/O rack for use in a mixing system. The 
Rio3224-D2 is an I/O rack featuring 32 channels of analog 
input, 16 channels of analog output, and 8 channels of 
AES/EBU output. The Rio1608-D2 is an I/O rack featuring 
16 channels of analog input and 8 channels of analog 
output. This manual explains the settings and 
troubleshooting that a mixing engineer or operator will 
perform when setting up or preparing the mixing system. 
In order to take full advantage of this product’s 
functionality, be sure to read this owner’s manual before 
use. After reading the manual, keep it for future reference.
NOTE
• Where specifications for the Rio3224-D2 differ from the 
Rio1608-D2, this manual places specifications that apply 
only to the Rio1608-D2 in curly brackets { } (e.g., [INPUT] 
connectors 1-32 {1-16}).
• Unless otherwise noted, illustrations for the Rio3224-D2 
are used.
• If certain specifications are common to both the 
Rio3224-D2 and Rio1608-D2, both units are collectively 
called “Rio-D2.”
• The RIVAGE PM, CL, and QL series devices can control 
the head amplifiers over communication protocols which 
allow for redundant connections. These devices are called 
“supported digital mixers” in this manual. On the other 
hand, the TF series, Nuage, MTX, and R Remote devices 
can control the head amplifiers over communication 
protocols which do not allow for redundant connections. 
Not only these devices but also “supported digital mixers” 
are collectively called “supported devices” in this manual.
Features
Long-distance Dante Network Capability
Low-latency, low-jitter audio can be transferred over 
distances up to 100 meters* between devices via standard 
Ethernet cables using the Dante network protocol. The 
Rio-D2 can be used as a general-purpose I/O box for the 
Dante network. Supported sampling rates are 44.1 kHz, 
48 kHz, 88.2 kHz, and 96 kHz.
This unit supports the AES67 standard for audio 
networking interoperability, and allows audio connections 
via AES67 with various compatible audio networks.
* Maximum practical distance may vary according to the cable used.
Display and Encoder for Improved 
Visibility and Operability
The front panel features an organic EL display, an encoder 
with switch, and buttons. The internal head amps and 
parameters such as HPF can be viewed and controlled 
using only the Rio-D2 unit itself. The unit’s internal errors 
and status are clearly indicated in the display.
Remotely Controllable Internal Head 
Amplifiers
Internal head amp parameters can be remotely controlled 
from the supported devices. 
Digital Outputs (Rio3224-D2 only)
The Rio3224-D2 features XLR-3-32 type balanced 
connectors for AES/EBU format digital audio outputs.
Gain Compensation Function
If the Gain Compensation function of the Rio-D2 is 
enabled from a supported device (such as a RIVAGE PM, 
CL, or QL series) or R Remote, the subsequent fluctuations 
in analog gain will be compensated for by the internal 
digital gain of the Rio-D2, and the audio signal will be 
output to the Dante network at the gain level that was fixed 
immediately before the Gain Compensation function was 
enabled. This means that, for example, if the same inputs 
are shared by FOH and monitor, changing the FOH gain 
will not affect the monitor mix balance.
Two Internal Power Supply Units
Duplicate power supplies allow continued operation even 
in the unlikely event that one power supply experiences a 
problem.
Quietness
Noise-reduction measures for the fans provide greater 
silence.
Firmware Updates
This product enables you to update the unit firmware to 
improve operations, add functions, and correct possible 
malfunctions. The following two types of firmware are 
available for the unit.
• Unit’s firmware
• Dante module firmware
Details on updating the firmware are available on the 
following website:
http://www.yamahaproaudio.com/
For information on updating and setting up the unit, please 
refer to the firmware update guide available on the website.
NOTE
When you update Dante firmware on the unit, be sure to 
update Dante firmware on other Dante-compatible devices 
connected to the Rio-D2.










