The Default Mixer Configuration

The RØDECaster Duo has seven separate inputs for connecting a wide range of devices and audio sources: two combo jacks for connecting microphones, instruments and other devices, a wireless receiver for connecting RØDE Series IV transmitters (including the Wireless GO II and Wireless ME), a 3.5mm TRRS headset input, a Bluetooth channel for connecting computers and mobile devices wirelessly, the SMART pad channel, and dual USB-C interfaces for connecting two computers and mobile devices, plus an extra virtual USB channel called ‘Chat’ for connecting chat apps, which is useful for livestreaming and other applications.

By default, these channels will be assigned to the faders as follows (unless you dictate otherwise during the Setup Wizard process):

• Fader 1 & 2: XLR/TRS Inputs 1 & 2
• Fader 3: Bluetooth
• Fader 4: SMART Pads
• Fader 5: USB 1
• Fader 6: USB 1 Chat
• Fader 7: USB 2

Assigning Inputs to Faders

There are multiple ways to change the mixer configuration. This can either be done during the Setup Wizard process, or via the fader set-up screen or the channel set-up screen.

To access the channel set-up screen for a fader, simply tap the button above the fader or the icon below the level meter, then tap the settings cog to access the channel assignment screen. Here you can select what input is assigned to that channel, unassign inputs, link stereo inputs and change the colour-coding of the channel. Once you have configured the channel, tap the green tick icon to save the settings. Repeat the process for the other faders you want to assign inputs to.

Connecting a Wireless Transmitter

The RØDECaster Duo has a built-in wireless receiver, allowing you to connect up to two RØDE Series IV wireless transmitters, including the Wireless GO II and Wireless ME. To do this, first access the channel setup screen by pressing the physical button above the fader you wish to assign your wireless device to. On this screen, you will see a list of microphone, instrument and other input option presets that you can scroll through. Scroll to the left to select the ‘Wireless’ option.

Note: It’s worth noting that assigning either of the input channels to the ‘Wireless’ option will override the associated physical input (the combo XLR/TRS input), meaning that you won’t hear any audio coming from microphones or instruments connected to that channel.

To actually pair the wireless transmitter, first tap ‘Pair New Device’ on your RØDECaster Duo, then follow the pairing process for your wireless device. To put either the Wireless GO II or Wireless ME transmitter into pairing mode, simply short-press its power button when the units are turned on and not already paired to another receiver.

Once connected, you’ll be able to see your device’s connectivity, recording, mute and battery status (where applicable) on the RØDECaster Duo screen. To unpair your device, simply access the channel setup screen again and tap the ‘Unpair’ button on the display.

Using the Physical and Virtual Faders

The RØDECaster Duo features four broadcast-quality physical faders and three virtual faders, allowing you to mix a total of seven separate inputs with complete hands-on control. The physical faders function like any other mixer: simply use the sliders to adjust the level for that channel. The fader position will be mirrored in real-time on the mixer interface.

The virtual faders work just like the physical faders, only you have a digital fader that is controlled by tapping the level meter then using the rotary encoder. You can also easily scroll through the virtual channels by pressing the rotary encoder. Pressing and holding the rotary encoder will mute the selected virtual channel.

Changing the Level Meter Display

There are two ways to display the level meters on the virtual mixer: ‘Default’ mode and ‘Broadcast’ mode. In ‘Default’ mode, there are markers at regular intervals, allowing you to easily visualise your levels, as well as a marker for unity gain. In ‘Broadcast’ mode, the level meters will include dBFS (decibels full scale) markers as well as a gain reduction meter (if you have the compressor activated on that channel). To switch between the two modes, go to settings then ‘Display’ > ‘Metering’ and select either ‘Default’ or ‘Broadcast’.

Using the Listen Buttons

The green button under each of the RØDECaster Duo's physical faders is a “listen” button (also known as a solo button). This allows you to monitor the audio from a channel by itself, without the rest of the audio mix (the solo’d audio will only be heard by the host/producer on headphone channel 1). You can also access this feature for the three virtual channels by tapping the level meter then tapping the ear icon.

Note: Pressing both the listen and mute buttons will activate ‘Back Channel’ mode, allowing the host/producer and guest to communicate “off-air”. This action can also be allocated to a SMART pad – check out the 'Using the SMART Pads' section for more information.

There are two different listen button modes: ‘After-fader Listen’ and ‘Pre-fader Listen’. To switch between these, go to settings, then ‘Outputs’ > ‘Listen’.

‘After-fader Listen’: When ‘Listen’ is engaged, the host/producer on headphone channel 1 will hear the channel at the fader level.

‘Pre-fader Listen’: When ‘Listen’ is engaged, the host/producer on headphone channel 1 will hear the channel at unity gain, regardless of the fader position.

Understanding the Outputs

The RØDECaster Duo has a total of eight audio outputs. These comprise of both analog outputs, including the two headphone outputs and the stereo monitor output, as well as digital outputs, including the Bluetooth channel, the audio that is recorded to the on-board microSD card, and the three USB outputs.

By default, the levels that you set using the physical and virtual faders on the main mixer will dictate the audio mix that is sent to all of these outputs. However, you can also create custom sub-mixes for these outputs (see below). This is particularly useful for streaming applications where you want full control over what audio sources and audio levels are sent to your stream, chat, headphones and other audio destinations. For channels that are used for two-way communications, you can also set the output configuration as mix-minus to mitigate unwanted echo or delay (see below for more information).

Note: The 3.5mm headset output on the front of the unit shares the same mix as the headphones 1 output.

Creating Custom Sub-mixes

To create a sub-mix for any outputs, tap the settings cog in the top-right corner of the main mixer screen and then navigate to ‘Outputs’ > ‘Routing’. Here you will see a menu with each of your eight different audio outputs. Tap the output you want to configure and select ‘Custom’ at the top of the screen.

Levels: Tap on one of the sliders and use the rotary encoder to adjust the level of an individual input channel up or down for the selected output sub-mix.

Links: The ‘link’ button below each fader allows you to tie the volume level for that channel to the main mix level, which is set by the physical faders and virtual faders on the main mixer screen. By default, all channels are linked (indicated by the white link icon with the dash in the centre), but tapping this button unlinks the fader in the sub-mix (yellow icon with no dash in centre).

When linked, adjusting individual levels in a sub-mix will create offset levels that are relative to the main mix fader, indicated by the blue bar on the fader. This means that any fader adjustments on the main mix will increase or decrease the sub-mix level but with this offset maintained. When unlinked, fader levels in a sub-mix will not change when the associated channel is adjusted in the main mix.

Mutes: The third option on the link button (a red ‘x’) mutes the associated channel in this sub-mix (note: when you select the mute setting on a channel in a sub-mix, this will clear the custom level you had set on that input’s fader and return it to the level set by the main mix).

Main Mix and Mix-Minus

Along with the ‘Custom’ setting, on some outputs you can also select ‘Main Mix’ (which simply uses the levels set by the physical and virtual faders on the main mixer) or ‘Mix-Minus’ for the output mix. For the Bluetooth and USB outputs, the ‘Mix-Minus’ option uses the same settings as the main mix but excludes the selected channel’s input (USB 1’s input on USB 1's output channel, for instance) in order to avoid feedback or echo. See our guides on USB connections and connecting online callers for more information on mix-minus.