git: 98a62ccab6ac - main - pcm.4: Document dev.pcm.%d.eq*

The branch main has been updated by christos:

URL: https://cgit.FreeBSD.org/src/commit/?id=98a62ccab6ac30d13c2dbcdc7468af8f87df4ec9

commit 98a62ccab6ac30d13c2dbcdc7468af8f87df4ec9
Author:     Christos Margiolis <christos@FreeBSD.org>
AuthorDate: 2026-04-17 15:47:44 +0000
Commit:     Christos Margiolis <christos@FreeBSD.org>
CommitDate: 2026-05-27 15:27:11 +0000

    pcm.4: Document dev.pcm.%d.eq*
    
    Sponsored by:   The FreeBSD Foundation
    MFC after:      1 week
    Pull Request:   https://ron-dev.freebsd.org/FreeBSD/src/pulls/15
---
 share/man/man4/pcm.4 | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/share/man/man4/pcm.4 b/share/man/man4/pcm.4
index 3f228d703b1a..b0f944a0d443 100644
--- a/share/man/man4/pcm.4
+++ b/share/man/man4/pcm.4
@@ -430,6 +430,17 @@ the definitive format/rate target.
 The recommended way to use bitperfect mode is to disable VCHANs and enable this
 sysctl.
 Default is disabled.
+.It Va dev.pcm.%d.eq
+Set to 1 or 0 to enable (1) or disable (0) the equalizer.
+Default is disabled.
+When enabled, the mixer bass and treble controls can be used, as well as the
+.Va dev.pcm.%d.eq_preamp
+tunable.
+.It Va dev.pcm.%d.eq_preamp
+Equalizer preamp (in dB).
+.Va dev.pcm.%d.eq
+has to be enabled, in order for this tunable to take effect.
+Read the tunable's description to see the available range of values.
 .It Va dev.pcm.%d.[play|rec].vchans
 Enable (1) or disable (0) VCHANs.
 Default is enabled.