YDIF is an abbreviation for Yamaha Digital InterFace. It is a proprietary sound transmission format for sending and receiving audio streams (total 16-channels) and wordclock via an Ethernet cable. The physical connections use a ring topography. YDIF can be used to connect rack mounted devices simply and easily. Control signals are not sent using YDIF but via a separate network port.

The maximum length of cable that can be used to connect devices using YDIF is 30m. Since up to 8 devices can be connected using YDIF, the total length of cable used can be up to 240 m (30 m x 8). However, this does not mean that two connected devices can be spaced 240 m apart, since devices are connected in a ring configuration.


Since YDIF is a proprietary Yamaha standard, it is not possible to increase this distance using a network switch.

Please use an 8-pin straight STP (shielded twisted-pair) Ethernet cable of Cat-5e or above.

Distribution Mode

In Distribution Mode, the default, up to 16 channels of audio signals are transferred in one direction — between multiple devices equipped with YDIF (MTX, MRX, EXi8, EXo8, and XMV), which are connected in ring connection. A single audio signal can be distributed to multiple devices.

Usage example:

The benefits of YDIF compared with analogue transmission is that audio signals are sent to XMV Series power amplifiers without any deterioration in sound quality, and cabling costs and labour costs are reduced.

What is the Distribution Mode on the YDIF?

Cascade Mode

Cascade Mode allows up to eight matrix bus channels of multiple MTX processors to be shared. By ring connecting up to four MTX processors, up to 32 channels of microphones can be connected and 8 shared mixes created. The 8 mixes can be used on all MTX processors, allowing up to 32 output channels. Only MTX processors can be connected in Cascade Mode with YDIF. Note that selection of distribution or cascade mode is made per device. Transmission to XMV amplifiers is always made in distribution mode.

Usage example:

Multiple MTX3 are connected in cascade mode to increase input channels.

What is the Cascade Mode on the YDIF?

Up to eight devices equipped with YDIF can be connected in Distribution Mode. However, at least one MTX/MRX processor must be included. Up to four MTX processors can be connected in Cascade Mode. However, only MTX processors can be connected in this mode.

It is possible to transmit audio signals between a Dante-compatible device and other Dante devices, such as a CL Series digital mixing console or a Dante MY16-AUD card, via a Dante network by setting up routing using Dante controller.

Since the control signal and the audio signal are transferred using a single Ethernet cable in Dante, it is not necessary to have separate Ethernet cables for the control signal and the audio signal.

If you use an EXi8 in conjunction with a MTX/MRX processor, you can control the EXi8's head amp using MTX-MRX Editor. However, the head amp of an I/O device such as a Rio Series device cannot be controlled using MTX-MRX Editor. In that case, R Remote software would be necessary.

Please refer to the YDIF and Dante compatibility chart below.

Which models support YDIF and Dante?

File system format: FAT32, FAT16, FAT12

Storage capacity: SDHC: up to 32 GB (FAT32)

SD: up to 2 GB (FAT16)

WAV: 16-bit 2-ch PCM

sampling frequencies:

8 kHz, 16 kHz, 32 kHz, 11.025 kHz, 22.05 kHz, 44.1 kHz, 12 kHz, 24 kHz, and 48 kHz

MP3: MPEG-1/2/2.5 Audio Layer-3

sampling frequencies:

MPEG-1: 32 kHz, 44.1 kHz, and 48 kHz

MPEG-2: 16 kHz, 22.05 kHz, and 24 kHz

MPEG-2.5: 8 kHz and 11.025 kHz

The AGC (auto gain controller) function automatically corrects the gain in accordance with the level of the input, so as to achieve a constant output signal level from input signals of varying levels. For example, when a single microphone is used by several people, the microphone position and voice amplitude will vary from person to person. The differences in volume when the sound is amplified make things difficult for the listener. In this type of instance the AGC can be used to maintain the amplified sound at a constant volume. Alternatively, when several CDs with different recording levels are being used for background music, turning on the AGC will enable the output to be maintained at a constant level, obviating the need to adjust the output level by hand every time the CD is changed.

Unlike a compressor function which can only reduce level, an AGC can also increase level.

The ANC (ambient noise compensator) function increases and decreases the output signal from an MTX/MRX processor in accordance with the signal level input from a microphone that measures ambient noise. The ANC on an MTX/MRX processor detects sections in which there is no sound (such as the gap between songs), measures the noise level during these gaps, and increases or decreases the output signal using the measured noise level as the standard noise level. This is known as a gap-type ANC. For example, if the noise at a party venue turns out to be louder than expected, it may be that the preset volume level on the MC's microphone will be insufficient. If the noise at the party is loud, the ANC will increase the volume level on the MC's microphone accordingly, so that the MC can be clearly heard by the attendees, despite the noise at the venue.

The FBS (feedback suppressor) function can prevent unpleasant feedback noises that occur when the sound from the loudspeakers feed back into the microphone. As well as being unpleasant or even painful on the listeners' ears, this can also damage the speakers in certain circumstances. To prevent feedback noise, a certain distance should be maintained between the speakers and the microphone, so that the microphone will not pick up the sound output by the speakers. If feedback still persists, despite this distance, use the FBS function to improve the feedback margin. This will inhibit the feedback, enabling you to increase the output volume.

The FBS (feedback suppressor) function eliminates unpleasant feedback frequencies by applying notch filters to them. The FBS on an MTX/MRX processor has a function that enables it to detect feedback frequencies automatically.

Select the type of filter to apply to the detected frequency according to whether it is fixed or dynamic in nature (as described below).


Method in which the feedback point in the hall where the speakers and microphone are located is detected in advance and the filter is set up at this point. Good for a fixed-position microphone.


Method in which a filter is applied that follows the wavelength of a constantly changing feedback point. Good for a wireless microphone that is used in different positions and thus cannot be confined to a single location.

Applying a dynamic FBS as well as a fixed FBS to a fixed-position microphone will serve to suppress feedback if you are holding the microphone or covering it with your hand.

Yes. If a system is comprised of multiple MTX/MRX processors and the presets on one of the processors are recalled, the presets for all the other processors corresponding to the same preset number are also recalled. Since the presets on an MTX/MRX processor can also include settings for EXi8s, EXo8s, and XMV Series amplifiers, a Preset Recall will also change the settings on any of these devices if they are part of the system—as well as the settings on any other MTX/MRX processor within the system.

You can perform a Preset Recall from the front panel. To perform any other operations, use MTX-MRX Editor or a controller such as a DCP controller, Wireless DCP, or GPI.

Each channel is internally supplied with +48 V of phantom power.You can turn phantom power on or off for each channel using MTX-MRX Editor. There is no master switch for phantom power, however.

It is not possible to control an MTX/MRX processor using MIDI signals. However, you can control an MTX/MRX processor remotely using a GPI or DCP controller, Wireless DCP or ProVisionaire Touch iPhone application, or third-party external controllers such as AMX or Crestron controllers.

* For details, please refer to "MTX3, MTX5-D, MRX7-D, XMV Series, EXi8, EXo8 remote control protocol specifications"

The MTX3 supports 26 x 8 matrix mixer input/output channels. The MTX5-D supports 34 x 16 matrix mixer input/output channels. The MTX5-D also boasts a Dante port and a Mini-YGDAI slot. Since the MTX5-D supports more matrix mixer input/output channels, it is suitable for systems handling greater numbers of audio signals. Since the MTX5-D is equipped with a Dante port, long-distance signal transmission is also possible. Thus the MTX5-D will allow you greater freedom in the construction of your audio network.

OS: Windows 7 Home Premium or above, Windows 8, Windows 10

CPU: Core i3/5 or above

RAM: at least 4 GB

HDD: at least 150 MB of free space

Display: over 1024 x 768 pixels

* Requires the installation of Bonjour by Apple.

It is possible to carry out remote operations such as MTX/MRX processor Preset Recall and controlling MTX/MRX processor parameters from an external controller such as an AMX or Crestron controller via a network (TCP/IP) port or remote (RS-232C) port.

* For details, please refer to "MTX3, MTX5-D, MRX7-D, XMV Series, EXi8, EXo8 remote control protocol specifications"

The RS-232C remote port allows remote operation of the MTX/MRX processor from an AMX or Crestron controller. Remote operation will also be possible via a network (TCP/IP) port.

Eight DCP controllers can be connected to a single MTX/MRX processor. Up to 4 MTX/MRX processors can be used in a single system, meaning up to 32 DCP controllers can be connected in total within a single system.

It is possible to connect up to eight units of DCP controller by using daisy chain connections of up to 200m. And, it ispossible to extend the connection distance by reducing the number of DCP series that are installed as below.

What is the greatest distance at which a DCP control panel can be connected to an MTX/MRX processor?


Since control commands issued by a DCP controller, a GPI controller, or Wireless DCP can be sent to any MTX/MRX processor within the system, a single controller can be used to control multiple MTX/MRX processors.

Maximum number of device connections per host is below.

How many devices can we connect to host devices such asMTX series or MRX7-D?

No it is not possible.You can only connect to DCP series and MTX/MRX series.

Using the Wireless DCP iPhone application you can perform the same operations as with a DCP controller (change the parameter settings on an MTX/MRX processor, perform a Preset Recall, and play back files stored on an SD card) via Wi-Fi from the touchscreen of your iPhone or iPad. You can even operate faders (which are not featured on a DCP controller).

Connect a Wi-Fi access point to your MTX/MRX processor using a Cat-5e cable and set an IP address on your iOS device (such as iPhone). If necessary, connect an Ethernet switch between the access point and the processor.

How should I connect the network devices in order to control the MTX/MRX processor using the Wireless DCP iPhone application?

The maximum number of remote controllers that can be connected to one unit of MTX/MRX is 8, including Wireless DCP, ProVisionaire Touch and AMX/Crestron devices.


Please use ProVisionaire Touch application to create a custom control panel.

Yes—on an iPhone (3GS or above), iPad, or iPod Touch (4th-generation or later) running Apple's iOS 5.0 or later. It will run as an iPhone app on an iPad or iPad Mini.


Up to 8 remote controllers (including Wireless DCP, ProVisionaire Touch and AMX/Crestron devices) can be connected to one unit of MTX/MRX.