fade: Add the ALSA mixer implementation.

[paraslash.git] / m4 / gengetopt / fade.m4

diff --git a/m4/gengetopt/fade.m4 b/m4/gengetopt/fade.m4
index e5d08bf00e45b7f17e7b5e8cc6d9a928d071fd50..42f135fa3ee5d3ed6d61faf9b4088fd00d8302e2 100644 (file)
--- a/m4/gengetopt/fade.m4
+++ b/m4/gengetopt/fade.m4
@@ -38,8 +38,10 @@ option "mixer-device" m
        string typestr = "device"
        optional
        details = "
-               If this option is not given '/dev/mixer' is used as
-               the default.
+               The default device (used if this option is not given)
+               depends on the selected mixer API. For ALSA, the
+               default is 'hw:0' which corresponds to the first sound
+               device. For OSS, '/dev/mixer' is used as the default.
        "
 
 option "mixer-channel" C
@@ -48,11 +50,18 @@ option "mixer-channel" C
        string typestr = "channel"
        optional
        details = "
-               The possible values are 'volume', 'bass', 'treble',
-               'synth', 'pcm', 'speaker', 'line', 'mic', 'cd', 'imix',
-               'altpcm', 'reclev', 'igain', 'ogain'. However, not all
-               listed channels might be supported on any particular
-               hardware. The default mixer channel is 'volume'.
+               For the ALSA mixer API, the possible values are
+               determined at runtime depending on the hardware and
+               can be printed by specifying an invalid mixer channel,
+               for example --mixer-channel help. The default channel
+               is 'Master'.
+
+               For OSS the possible values are invariably 'volume',
+               'bass', 'treble', 'synth', 'pcm', 'speaker', 'line',
+               'mic', 'cd', 'imix', 'altpcm', 'reclev', 'igain',
+               'ogain'. However, not all listed channels might be
+               supported on any particular hardware. The default
+               channel is 'volume'.
        "
 
 section "Options for sleep mode"