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+This document describes standard names of mixer controls.
+
+Syntax: SOURCE [DIRECTION] FUNCTION
+
+DIRECTION:
+ <nothing> (both directions)
+ Playback
+ Capture
+ Bypass Playback
+ Bypass Capture
+
+FUNCTION:
+ Switch (on/off switch)
+ Volume
+ Route (route control, hardware specific)
+
+SOURCE:
+ Master
+ Master Mono
+ Hardware Master
+ Speaker (internal speaker)
+ Headphone
+ Beep (beep generator)
+ Phone
+ Phone Input
+ Phone Output
+ Synth
+ FM
+ Mic
+ Line
+ CD
+ Video
+ Zoom Video
+ Aux
+ PCM
+ PCM Front
+ PCM Rear
+ PCM Pan
+ Loopback
+ Analog Loopback (D/A -> A/D loopback)
+ Digital Loopback (playback -> capture loopback - without analog path)
+ Mono
+ Mono Output
+ Multi
+ ADC
+ Wave
+ Music
+ I2S
+ IEC958
+
+Exceptions:
+ [Digital] Capture Source
+ [Digital] Capture Switch (aka input gain switch)
+ [Digital] Capture Volume (aka input gain volume)
+ [Digital] Playback Switch (aka output gain switch)
+ [Digital] Playback Volume (aka output gain volume)
+ Tone Control - Switch
+ Tone Control - Bass
+ Tone Control - Treble
+ 3D Control - Switch
+ 3D Control - Center
+ 3D Control - Depth
+ 3D Control - Wide
+ 3D Control - Space
+ 3D Control - Level
+ Mic Boost [(?dB)]
+
+PCM interface:
+
+ Sample Clock Source { "Word", "Internal", "AutoSync" }
+ Clock Sync Status { "Lock", "Sync", "No Lock" }
+ External Rate /* external capture rate */
+ Capture Rate /* capture rate taken from external source */
+
+IEC958 (S/PDIF) interface:
+
+ IEC958 [...] [Playback|Capture] Switch /* turn on/off the IEC958 interface */
+ IEC958 [...] [Playback|Capture] Volume /* digital volume control */
+ IEC958 [...] [Playback|Capture] Default /* default or global value - read/write */
+ IEC958 [...] [Playback|Capture] Mask /* consumer and professional mask */
+ IEC958 [...] [Playback|Capture] Con Mask /* consumer mask */
+ IEC958 [...] [Playback|Capture] Pro Mask /* professional mask */
+ IEC958 [...] [Playback|Capture] PCM Stream /* the settings assigned to a PCM stream */
+ IEC958 Q-subcode [Playback|Capture] Default /* Q-subcode bits */
+ IEC958 Preamble [Playback|Capture] Default /* burst preamble words (4*16bits) */