doc: Bluetooth LE Controller: mention audio case

Mentioned the separate controller for audio usage. Ref: https://nordicsemi.atlassian.net/browse/NCSDK-22510 Signed-off-by: Pekka Niskanen <[email protected]>
jayteemo · Sep 5, 2023 · 3d70f7f · 3d70f7f
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diff --git a/doc/nrf/protocols/ble/index.rst b/doc/nrf/protocols/ble/index.rst
@@ -58,6 +58,7 @@ Usage in samples
 
 Most :ref:`Bluetooth LE samples <ble_samples>` in the |NCS| can use either Bluetooth LE Controller.
 An exception is the :ref:`ble_llpm` sample, which requires the SoftDevice Controller that supports LLPM.
+There is also a separate controller for the :ref:`nrf53_audio_app` application, namely the :ref:`lib_bt_ll_acs_nrf53_readme`.
 
 By default, all samples are currently configured to use SoftDevice Controller.
 To use the Zephyr Bluetooth LE Controller instead, set :kconfig:option:`CONFIG_BT_LL_SW_SPLIT` to ``y`` in the :file:`prj.conf` file (see :ref:`configure_application`) and make sure to build from a clean build directory.