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authorOswald Buddenhagen <oswald.buddenhagen@gmx.de>2023-04-05 23:12:20 +0300
committerTakashi Iwai <tiwai@suse.de>2023-04-06 11:14:23 +0300
commitd3330cb8e36a50184a1a7d36019937c1f62f2a04 (patch)
tree1a1dc00f412e56701d33e5d221d544682d0a8c57 /Documentation/sound
parent3ab06bf1389f2649e73bfa0d524d1a4890bd68d5 (diff)
downloadlinux-d3330cb8e36a50184a1a7d36019937c1f62f2a04.tar.xz
ALSA: emu10k1: documentation updates
- Less misinformation - Language and whitespace fixups Signed-off-by: Oswald Buddenhagen <oswald.buddenhagen@gmx.de> Link: https://lore.kernel.org/r/20230405201220.2197893-1-oswald.buddenhagen@gmx.de Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'Documentation/sound')
-rw-r--r--Documentation/sound/alsa-configuration.rst5
-rw-r--r--Documentation/sound/cards/audigy-mixer.rst27
-rw-r--r--Documentation/sound/cards/sb-live-mixer.rst17
3 files changed, 28 insertions, 21 deletions
diff --git a/Documentation/sound/alsa-configuration.rst b/Documentation/sound/alsa-configuration.rst
index 5f31fa5e2435..af71c68f1e4e 100644
--- a/Documentation/sound/alsa-configuration.rst
+++ b/Documentation/sound/alsa-configuration.rst
@@ -723,9 +723,10 @@ Module for EMU10K1/EMU10k2 based PCI sound cards.
* Sound Blaster Live!
* Sound Blaster PCI 512
-* Emu APS (partially supported)
* Sound Blaster Audigy
-
+* E-MU APS (partially supported)
+* E-MU DAS
+
extin
bitmap of available external inputs for FX8010 (see below)
extout
diff --git a/Documentation/sound/cards/audigy-mixer.rst b/Documentation/sound/cards/audigy-mixer.rst
index c506f8d16f2e..aa176451d5b5 100644
--- a/Documentation/sound/cards/audigy-mixer.rst
+++ b/Documentation/sound/cards/audigy-mixer.rst
@@ -19,9 +19,9 @@ Digital mixer controls
These controls are built using the DSP instructions. They offer extended
functionality. Only the default built-in code in the ALSA driver is described
here. Note that the controls work as attenuators: the maximum value is the
-neutral position leaving the signal unchanged. Note that if the same destination
-is mentioned in multiple controls, the signal is accumulated and can be wrapped
-(set to maximal or minimal value without checking of overflow).
+neutral position leaving the signal unchanged. Note that if the same destination
+is mentioned in multiple controls, the signal is accumulated and can be clipped
+(set to maximal or minimal value without checking for overflow).
Explanation of used abbreviations:
@@ -32,17 +32,17 @@ ADC
analog to digital converter
I2S
one-way three wire serial bus for digital sound by Philips Semiconductors
- (this standard is used for connecting standalone DAC and ADC converters)
+ (this standard is used for connecting standalone D/A and A/D converters)
LFE
- low frequency effects (subwoofer signal)
+ low frequency effects (used as subwoofer signal)
AC97
- a chip containing an analog mixer, DAC and ADC converters
+ a chip containing an analog mixer, D/A and A/D converters
IEC958
S/PDIF
FX-bus
the EMU10K2 chip has an effect bus containing 64 accumulators.
- Each of the synthesizer voices can feed its output to these accumulators
- and the DSP microcontroller can operate with the resulting sum.
+ Each of the synthesizer voices can feed its output to these accumulators
+ and the DSP microcontroller can operate with the resulting sum.
name='PCM Front Playback Volume',index=0
----------------------------------------
@@ -218,8 +218,8 @@ LFE outputs.
name='IEC958 Optical Raw Playback Switch',index=0
-------------------------------------------------
If this switch is on, then the samples for the IEC958 (S/PDIF) digital
-output are taken only from the raw FX8010 PCM, otherwise standard front
-PCM samples are taken.
+output are taken only from the raw iec958 ALSA PCM device (which uses
+accumulators 20 and 21 for left and right PCM by default).
PCM stream related controls
@@ -237,8 +237,8 @@ as follows:
name='EMU10K1 PCM Send Routing',index 0-31
------------------------------------------
-This control specifies the destination - FX-bus accumulators. There 24
-values with this mapping:
+This control specifies the destination - FX-bus accumulators. There are 24
+values in this mapping:
* 0 - mono, A destination (FX-bus 0-63), default 0
* 1 - mono, B destination (FX-bus 0-63), default 1
@@ -306,6 +306,9 @@ MANUALS/PATENTS
ftp://opensource.creative.com/pub/doc
-------------------------------------
+Note that the site is defunct, but the documents are available
+from various other locations.
+
LM4545.pdf
AC97 Codec
diff --git a/Documentation/sound/cards/sb-live-mixer.rst b/Documentation/sound/cards/sb-live-mixer.rst
index 357fcd619d39..819886634400 100644
--- a/Documentation/sound/cards/sb-live-mixer.rst
+++ b/Documentation/sound/cards/sb-live-mixer.rst
@@ -15,7 +15,7 @@ The ALSA driver programs this portion of chip by default code
IEC958 (S/PDIF) raw PCM
=======================
-This PCM device (it's the 4th PCM device (index 3!) and first subdevice
+This PCM device (it's the 3rd PCM device (index 2!) and first subdevice
(index 0) for a given card) allows to forward 48kHz, stereo, 16-bit
little endian streams without any modifications to the digital output
(coaxial or optical). The universal interface allows the creation of up
@@ -33,9 +33,9 @@ Digital mixer controls
These controls are built using the DSP instructions. They offer extended
functionality. Only the default built-in code in the ALSA driver is described
here. Note that the controls work as attenuators: the maximum value is the
-neutral position leaving the signal unchanged. Note that if the same destination
-is mentioned in multiple controls, the signal is accumulated and can be wrapped
-(set to maximal or minimal value without checking of overflow).
+neutral position leaving the signal unchanged. Note that if the same destination
+is mentioned in multiple controls, the signal is accumulated and can be clipped
+(set to maximal or minimal value without checking for overflow).
Explanation of used abbreviations:
@@ -46,11 +46,11 @@ ADC
analog to digital converter
I2S
one-way three wire serial bus for digital sound by Philips Semiconductors
- (this standard is used for connecting standalone DAC and ADC converters)
+ (this standard is used for connecting standalone D/A and A/D converters)
LFE
- low frequency effects (subwoofer signal)
+ low frequency effects (used as subwoofer signal)
AC97
- a chip containing an analog mixer, DAC and ADC converters
+ a chip containing an analog mixer, D/A and A/D converters
IEC958
S/PDIF
FX-bus
@@ -313,6 +313,9 @@ MANUALS/PATENTS
ftp://opensource.creative.com/pub/doc
-------------------------------------
+Note that the site is defunct, but the documents are available
+from various other locations.
+
LM4545.pdf
AC97 Codec
m2049.pdf