[ALSA - utils 0001909]: Labelling of controls for SB Extigy is confusing

[bugtrack@alsa-project.org]

A NOTE has been added to this issue.
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<https://bugtrack.alsa-project.org/alsa-bug/view.php?id=1909> 
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Reported By:                andersin
Assigned To:                
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Project:                    ALSA - utils
Issue ID:                   1909
Category:                   alsamixer
Reproducibility:            always
Severity:                   text
Priority:                   normal
Status:                     new
======================================================================
Date Submitted:             03-11-2006 16:33 CET
Last Modified:              08-03-2006 09:47 CEST
======================================================================
Summary:                    Labelling of controls for SB Extigy is confusing
Description: 
The controls for the SB Extigy are all labelled as Master. The names should
reflect the channel(s) that they control. Amixer shows this information
(albeit its mapping of controls to actual channels is off).
Additionally a Master 1 control exists that changes the volume of all
channels.
======================================================================

----------------------------------------------------------------------
 Raymond - 08-03-06 04:16 
----------------------------------------------------------------------
Most likely both alsamixer and amixer cannot handle these two controls
properly

http://www.alsa-project.org/~iwai/writing-an-alsa-driver/x851.htm

The index field holds the index number of this control. If there are
several different controls with the same name, they can be distinguished
by the index
number. This is the case when several codecs exist on the card. If the
index is zero, you can omit the definition above. 

You have to ask the ALSA developer why index controls can have different
count.
The mixer applications need to be very smart to handle this difference in
count

       control.16 {
                 comment.access 'read write'
                 comment.type INTEGER
                 comment.count 6
                 comment.range '0 - 200'
                 iface MIXER
                 name 'Master Playback Volume'
                 value.0 130
                 value.1 130
                 value.2 130
                 value.3 130
                 value.4 130
                 value.5 130
         }
         control.17 {
                 comment.access 'read write'
                 comment.type INTEGER
                 comment.count 1
                 comment.range '0 - 200'
                 iface MIXER
                 name 'Master Playback Volume'
                 index 1
                 value 130
         }



----------------------------------------------------------------------
 Raymond - 08-03-06 09:47 
----------------------------------------------------------------------
Syntax: SOURCE [DIRECTION] FUNCTION

The following controls appear in capture view of alsamixer because it miss
the 'Playback' direction

Simple mixer control 'Bass',0
  Capabilities: volume volume-joined
  Playback channels: Mono
  Capture channels: Mono
  Limits: 0 - 96
  Mono: 48 [50%]
Simple mixer control 'Treble',0
  Capabilities: volume volume-joined
  Playback channels: Mono
  Capture channels: Mono
  Limits: 0 - 96
  Mono: 48 [50%]

The following control should only appear in capture view of alsamixer,
because the control name did not follow Syntax: SOURCE [DIRECTION]
FUNCTION

Simple mixer control 'Capture Input Source',0
  Capabilities: enum
  Items: 'Input 0' 'Mic' 'Mixer'
  Item0: 'Input 0'

Simple mixer control 'Digital In',0
  Capabilities: volume volume-joined pswitch pswitch-joined
  Playback channels: Mono
  Capture channels: Mono
  Limits: 0 - 200
  Mono: 200 [100%] Playback [on]

These control also not follow the syntax.

Simple mixer control 'Channel Routing Mode Select',0
  Capabilities: volume volume-joined
  Playback channels: Mono
  Capture channels: Mono
  Limits: 0 - 6
  Mono: 6 [100%]

similar bug report https://bugtrack.alsa-project.org/alsa-bug/view.php?id=1971
and https://bugtrack.alsa-project.org/alsa-bug/view.php?id=1366

http://hg-mirror.alsa-project.org/alsa-kernel?f=2cd9765e57f6;file=Documentation/ControlNames.txt;style=gitweb

Issue History
Date Modified  Username       Field                    Change              
======================================================================
03-11-06 16:33 andersin       New Issue                                    
08-02-06 02:40 Raymond        Note Added: 0011384                          
08-02-06 14:31 andersin       Note Added: 0011388                          
08-02-06 14:31 andersin       Note Added: 0011389                          
08-03-06 04:06 Raymond        Note Added: 0011395                          
08-03-06 04:16 Raymond        Note Edited: 0011395                         
08-03-06 09:47 Raymond        Note Added: 0011397                          
======================================================================



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