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Diffstat (limited to 'Documentation/sound/cards/audigy-mixer.rst')
| -rw-r--r-- | Documentation/sound/cards/audigy-mixer.rst | 27 |
1 files changed, 15 insertions, 12 deletions
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 |