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Archived:Background noise while streaming zero-filled buffers (Known Issue)

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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]]
 
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==Description==
 
==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.
 
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.
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==Solution==
 
==Solution==
 
Applications should not implement a <nowiki>’</nowiki>mute<nowiki>’</nowiki> functionality by streaming zero-filled &nbsp;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.
 
Applications should not implement a <nowiki>’</nowiki>mute<nowiki>’</nowiki> functionality by streaming zero-filled &nbsp;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.
 
[[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 07:55, 14 March 2012

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Article Metadata
Compatibility
Platform(s): S60 2nd Edition and FP1, FP2, FP3
S60 3rd Edition and FP1
S60 3rd Edition FP1
S60 3rd Edition (initial release)
S60 2nd Edition (initial release)
Article
Created: User:Technical writer 1 (21 May 2007)
Last edited: debjit.roy (14 Mar 2012)

Archived.pngArchived: This article is archived because it is not considered relevant for third-party developers creating commercial solutions today. If you think this article is still relevant, let us know by adding the template {{ReviewForRemovalFromArchive|user=~~~~|write your reason here}}.

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.

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