diff --git a/Documentation/sound/alsa-configuration.rst b/Documentation/sound/alsa-configuration.rst
index af71c68f1e4e..829c672d9fe6 100644
--- a/Documentation/sound/alsa-configuration.rst
+++ b/Documentation/sound/alsa-configuration.rst
@@ -133,6 +133,19 @@ enable
     enable card;
     Default: enabled, for PCI and ISA PnP cards
 
+These options are used for either specifying the order of instances or
+controlling enabling and disabling of each one of the devices if there
+are multiple devices bound with the same driver. For example, there are
+many machines which have two HD-audio controllers (one for HDMI/DP
+audio and another for onboard analog). In most cases, the second one is
+in primary usage, and people would like to assign it as the first
+appearing card. They can do it by specifying "index=1,0" module
+parameter, which will swap the assignment slots.
+
+Today, with the sound backend like PulseAudio and PipeWire which
+supports dynamic configuration, it's of little use, but that was a
+help for static configuration in the past.
+
 Module snd-adlib
 ----------------