# Sound Card

The mixing console Behringer X32 Producer in the Radio Angrezi studio has a sound card module connected which allows it to function as an audio interface with the studio's Mac Mini through USB connection. The studio's Mac Mini should set this (recognised as "X-USB" on the computer) as the default audio output device **at all time**.  It can be done by clicking the speaker icon on the top right part of the computer.

As a sound card, the routing is set up as following:

**Input Channels**

* 1-16 receive audio directly from the Analog Inputs (XLR input 1-16 behind the Mixer) as pre-fader signal (signal is not affected by the faders)
* 17-18 receive audio from the mixer's Output Channel 9-10 (for audio **to** Call-in during a call-in session (Please refer to the "Call-in (Video Call) & Loopback" page))
* 19-24 are not assigned
* 25-26 receive audio from the mixer's Output Channel 1-2 (Studio Monitor output channels) - post-fader (signal is affected by the output fader)
* 27-28 receive audio from the mixer's Output Channel 3-4 (Passage output channels) - post-fader
* 29-30 receive audio from the mixer's Output Channel 5-6 - post-fader
* 31-32 receive audio from the mixer's MAIN Output (Stream) - post-fader

**Output Channels**

* 1-2 -> Mixer Input Channel 17-18 (Main computer output)
* 3-4 -> Mixer Input Channel 19-20 (for audio **from** Call-in during call-in session (Please refer to the "Call-in (Video Call) & Loopback" page))
* 5-16 -> Mixer Input Channel 21-32 (Not assigned)