The following issue has been ASSIGNED. ====================================================================== <https://bugtrack.alsa-project.org/alsa-bug/view.php?id=1909> ====================================================================== Reported By: andersin Assigned To: Clemens Ladisch ====================================================================== Project: ALSA - driver Issue ID: 1909 Category: USB - usb-audio Reproducibility: always Severity: text Priority: normal Status: assigned Distribution: Kernel Version: ====================================================================== Date Submitted: 03-11-2006 16:33 CET Last Modified: 08-04-2006 18:50 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 11:43 ---------------------------------------------------------------------- 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 Refer to appearance of EQ peaks in alsamixer.png in https://bugtrack.alsa-project.org/alsa-bug/view.php?id=1366 , alsamixer is supposed to handle up to 8 channels ( 2 , 2 , 1 , 1, 2 ) with 5 sliders (i.e. front, rear, centre, lfe , side ) when the count of the control is greater than two and up to eight only. 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 08-03-06 09:55 Raymond Note Edited: 0011397 08-03-06 09:57 Raymond Note Edited: 0011397 08-03-06 09:58 Raymond Note Edited: 0011397 08-03-06 09:59 Raymond Note Edited: 0011397 08-03-06 11:43 Raymond Note Edited: 0011397 08-04-06 18:49 Clemens LadischProject ALSA - utils => ALSA - driver 08-04-06 18:50 Clemens LadischAssigned To => Clemens Ladisch 08-04-06 18:50 Clemens LadischStatus new => assigned 08-04-06 18:50 Clemens LadischCategory alsamixer => USB - usb-audio ====================================================================== ------------------------------------------------------------------------- Take Surveys. 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