From 44c5b8459b18fe23017b645ce085890525e711a2 Mon Sep 17 00:00:00 2001
From: mdodd <mdodd@FreeBSD.org>
Date: Wed, 9 Apr 2003 15:25:52 +0000
Subject: Implement relative mixer adjustment.

PR:		46679 (similar functionality)
---
 usr.sbin/mixer/mixer.8 | 22 +++++++++++++++++-----
 1 file changed, 17 insertions(+), 5 deletions(-)

(limited to 'usr.sbin/mixer/mixer.8')

diff --git a/usr.sbin/mixer/mixer.8 b/usr.sbin/mixer/mixer.8
index 3f5a926..1f5a571 100644
--- a/usr.sbin/mixer/mixer.8
+++ b/usr.sbin/mixer/mixer.8
@@ -37,19 +37,24 @@
 .Nm
 .Op Fl f Ar device
 .Op Fl s
-.Oo
 .Oo Ar dev
-.Op Ar lvol Ns Op : Ns Ar rvol
-.Cm | recsrc |
+.Op Oo +|- Ns Oc Ns Ar lvol Ns Op : Ns Oo +|- Oc Ns Ar rvol Oc
+.Ar ...
+.Nm
+.Op Fl f Ar device
+.Op Fl s
+.Cm recsrc
+.Ar ...
+.Nm
+.Op Fl f Ar device
+.Op Fl s
 .Sm off
 .Eo \&{
 .Cm ^ | + | - | =
 .Sm on
 .Ec \&} Ns Cm rec
 .Ar rdev
-.Oc
 .Ar ...
-.Oc
 .Sh DESCRIPTION
 The
 .Nm
@@ -87,6 +92,13 @@ arguments may be from 0 - 100.  Omitting
 .Ar dev
 and including only the channel settings will change the main volume level.
 .Pp
+If the left or right channel settings are prefixed with
+.Sq +
+or
+.Sq -
+the value following will be used as a relative adjustment, modifying the
+current settings by the amount specified.
+.Pp
 If the
 .Fl s
 flag is used, the current mixer values will be displayed in a format suitable
-- 
cgit v1.1