Audio input, why need gain and attenuation?
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Posted by Boki on December 7, 2006, 10:32 am
Please log in for more thread options Hi All, I have a audio sink ( it is chip's audio input ), there are gain and attenuation settings. My audio source is constant level, so, I think I only need gain or only need attenuation for this sink, am I right ? What I am confusing is I saw a setting both have gain and attenuation ... I feel it is strange, is the setting is correct ? could you please advice ? Thank you very much! Best regards, Boki. | |||||||||||||||||||
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Posted by martin griffith on December 7, 2006, 12:17 pm
Please log in for more thread options On 7 Dec 2006 07:32:32 -0800, in sci.electronics.design "Boki" martin | |||||||||||||||||||
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Posted by Andrew Holme on December 7, 2006, 2:32 pm
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> Hi All,
> > I have a audio sink ( it is chip's audio input ), there are gain and > attenuation settings. > > My audio source is constant level, so, I think I only need gain or only > need attenuation for this sink, am I right ? > > What I am confusing is I saw a setting both have gain and attenuation > ... > > I feel it is strange, is the setting is correct ? could you please > advice ? > > > Thank you very much! > > Best regards, > Boki. > It might be for the same reason you have two gear levers on your bicycle. | |||||||||||||||||||
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Posted by Le Chaud Lapin on December 7, 2006, 4:33 pm
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Andrew Holme wrote: > It might be for the same reason you have two gear levers on your bicycle.
Or the reason that you can move the main sail both inward and outward on a sailboat. -Le Chaud Lapin- | |||||||||||||||||||
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Posted by Eeyore on December 7, 2006, 4:27 pm
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Boki wrote: > Hi All,
> > I have a audio sink ( it is chip's audio input ), there are gain and > attenuation settings. What do you mean by a 'sink' ? > My audio source is constant level,
Only continuous tones are *constant level* ! Perhaps you could be more specific ? > so, I think I only need gain or only
> need attenuation for this sink, am I right ? Depends what you're doing ! >
> What I am confusing is I saw a setting both have gain and attenuation Gain and attenuation are used to control 'volume' and the sensitivity of an input so that it isn't overloaded ( doesn't clip ) as well as optimise signal to noise ratio. A more detailed decription or simple block diagram with signal levels and chip types would help. Graham | |||||||||||||||||||
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>
>I have a audio sink ( it is chip's audio input ), there are gain and
>attenuation settings.
>
>My audio source is constant level, so, I think I only need gain or only
>need attenuation for this sink, am I right ?
>
>What I am confusing is I saw a setting both have gain and attenuation
>...
>
>I feel it is strange, is the setting is correct ? could you please
>advice ?
>
>
>Thank you very much!
>
>Best regards,
>Boki.