In order to allow you to loop audio from one application to another, iD4’s software includes the Loopback mixer.
This allows you to blend from both the Mic and DI Inputs and from the playback of your computer into a signal stereo feed to either record or stream by pulling up faders of the various channels. The channels are as follows:
Mic 1 - The signal from the Mic input on the rear of the iD4
Mic 2- The signal from the DI on the front of the iD4.
Main Output 1/2 - The Audio that is currently playing back through the headphone and speaker outputs. This would be the audio being send to outputs 1+2 in your DAW.
Loop-back 1/2 - This is the dedicated loopback outputs of the iD4 which allow you to loop audio without affecting your playback. This would be the audio being sent to outputs 3+4 in your DAW.
Using the Loop-back Mix
To record or stream your loop-back mix, simply select either Input 3+4 or Loopback 1+2 in your audio software.
If you’re unsure how to do this on your software, check out the documentation for your software more details but it’ll typically be in the preferences panel.
Sending Audio to the Loopback Outputs
Most DAW’s and audio software will allow you to select your audio output as part of the audio preferences or in a mixer. Again, for details on how to do this, check the manual or documentation for your software.
For applications that don’t give you this option however you can simply adjust the system settings.
To adjust your output channels, you’ll need to go to the Audio MIDI setup utility. This can be found by going to
Finder > Applications > Utilities > Audio MIDI Setup
You should now see a list of audio devices currently connected to the Mac. Select the ID4, go to the Output panel and click “Configure Speakers”. Now set the Outputs to Loopback 1 and Loopback 2.
Click Apply and now all audio will be sent to the Loopback channel instead of the Main outputs ready to be sent to any other applications.
On Windows, you can simply change your output channel by going to the Sound settings in the Control Panel. Go to the Playback device list and select Loopback 1+2 as your Output Device.