Archived:Background noise while streaming zero-filled buffers (Known Issue)
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| − | {| | + | __NOTOC__ |
| − | | | + | __NOEDITSECTION__ |
| − | | | + | {{KnowledgeBase |
| + | |id=KIS000656 | ||
| + | |platform=S60 2nd Edition and FP1, FP2, FP3<br>S60 3rd Edition and FP1 | ||
| + | |devices= | ||
| + | |category=Symbian C<nowiki>++</nowiki> | ||
| + | |subcategory=Audio | ||
| + | |creationdate=May 21, 2007 | ||
| + | |keywords= | ||
| + | }} | ||
| − | + | ==Description== | |
| − | + | In some S60 devices the level of background noise may be disturbing when using an audio output stream to play back silence; that is, when the stream is fed with zero-filled buffers. | |
| − | + | ||
| − | + | ==Solution== | |
| − | + | Applications should not implement a <nowiki>’</nowiki>mute<nowiki>’</nowiki> functionality by streaming zero-filled buffers. Instead, the output stream should either be stopped or its volume level should be set to 0.<br>Note that adjusting the volume is a significantly faster operation than stopping/ restarting the stream. | |
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[[Category:Known Issue]][[Category:Symbian C++]][[Category:Audio]] [[Category:S60 2nd Edition]] [[Category:S60 3rd Edition]][[Category:S60 3rd Edition, Feature Pack 1]] | [[Category:Known Issue]][[Category:Symbian C++]][[Category:Audio]] [[Category:S60 2nd Edition]] [[Category:S60 3rd Edition]][[Category:S60 3rd Edition, Feature Pack 1]] | ||
Revision as of 16:56, 27 October 2008
Article Metadata
Compatibility
Platform(s): S60 2nd Edition and FP1, FP2, FP3
S60 3rd Edition and FP1
S60 3rd Edition and FP1
Article
Created: (21 May 2007)
Last edited: extkbeditor2
(27 Oct 2008)
Description
In some S60 devices the level of background noise may be disturbing when using an audio output stream to play back silence; that is, when the stream is fed with zero-filled buffers.
Solution
Applications should not implement a ’mute’ functionality by streaming zero-filled buffers. Instead, the output stream should either be stopped or its volume level should be set to 0.
Note that adjusting the volume is a significantly faster operation than stopping/ restarting the stream.
