> For the complete documentation index, see [llms.txt](https://docs.radioangrezi.de/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.radioangrezi.de/engineering/behringer-x32-producer-mixer/sound-card.md). # 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) --- # Agent Instructions This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com. ## Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter: ``` GET https://docs.radioangrezi.de/engineering/behringer-x32-producer-mixer/sound-card.md?ask=&goal= ``` `ask` is the immediate question: it should be specific, self-contained, and written in natural language. `goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.