×
Namespaces

Variants
Actions
(Difference between revisions)

Archived:Full duplex with PCM16 codec produces echo on Nokia N95 with AD-54 headset (Known Issue)

From Nokia Developer Wiki
Jump to: navigation, search
debjit.roy (Talk | contribs)
(Debjit.roy -)
hamishwillee (Talk | contribs)
m (Hamishwillee - Bot update - Fix metadata etc)
Line 1: Line 1:
[[Category:Symbian C++]][[Category:Known Issue]][[Category:S60 3rd Edition, Feature Pack 1]][[Category:Hardware]][[Category:Audio]]
+
[[Category:Symbian C++]][[Category:Known Issue]][[Category:S60 3rd Edition FP1]][[Category:Hardware]][[Category:Audio]]
{{KBKI}}
+
{{ArticleMetaData <!-- v1.2 -->
__NOTOC__
+
__NOEDITSECTION__
+
{{ArticleMetaData
+
|id=KIS001042
+
|platform=S60 3rd Edition, FP1
+
|devices=Nokia N95, Nokia N95 8GB
+
|category=Symbian C++
+
|subcategory=Audio, Hardware
+
|creationdate=June 19, 2008
+
|keywords=
+
 
+
 
|sourcecode= <!-- Link to example source code (e.g. [[Media:The Code Example ZIP.zip]]) -->
 
|sourcecode= <!-- Link to example source code (e.g. [[Media:The Code Example ZIP.zip]]) -->
 
|installfile= <!-- Link to installation file (e.g. [[Media:The Installation File.sis]]) -->
 
|installfile= <!-- Link to installation file (e.g. [[Media:The Installation File.sis]]) -->
|sdk=<!-- SDK(s) built and tested against (e.g. [http://linktosdkdownload/ Nokia Qt SDK 1.1]) -->
+
|devices= Nokia N95, Nokia N95 8GB
|devicecompatability=<!-- Compatible devices (e.g.: All* (must have GPS) ) -->
+
|sdk= <!-- SDK(s) built and tested against (e.g. [http://linktosdkdownload/ Nokia Qt SDK 1.1]) -->
|signing=<!-- Empty or one of Self-Signed, DevCert, Manufacturer -->
+
|platform= S60 3rd Edition, FP1
|capabilities=<!-- Capabilities required (e.g. Location, NetworkServices.) -->
+
|devicecompatability= <!-- Compatible devices (e.g.: All* (must have GPS) ) -->
|author=[[User:Technical writer 1]]
+
|dependencies= <!-- Any other/external dependencies e.g.: Google Maps Api v1.0 -->
 +
|signing= <!-- Empty or one of Self-Signed, DevCert, Manufacturer -->
 +
|capabilities= <!-- Capabilities required by the article/code example (e.g. Location, NetworkServices. -->
 +
|keywords= <!-- APIs, classes and methods (e.g. QSystemScreenSaver, QList, CBase -->
 +
|language= <!-- Language category code for non-English topics - e.g. Lang-Chinese -->
 +
|translated-by= <!-- [[User:XXXX]] -->
 +
|translated-from-title= <!-- Title only -->
 +
|translated-from-id= <!-- Id of translated revision -->
 +
|review-by= <!-- After re-review: [[User:username]] -->
 +
|review-timestamp= <!-- After re-review: YYYYMMDD -->
 +
|update-by= <!-- After significant update: [[User:username]]-->
 +
|update-timestamp= <!-- After significant update: YYYYMMDD -->
 +
|creationdate= 20080619
 +
|author= [[User:Technical writer 1]]
 +
<!-- The following are not in current metadata -->
 +
|subcategory= Audio, Hardware
 +
|id= KIS001042
 
}}
 
}}
 
{{Archived|timestamp=20120313123208|user=roy.debjit| }}
 
{{Archived|timestamp=20120313123208|user=roy.debjit| }}

Revision as of 08:51, 15 March 2012

Article Metadata
Tested with
Devices(s): Nokia N95, Nokia N95 8GB
Compatibility
Platform(s): S60 3rd Edition, FP1
S60 3rd Edition FP1
Article
Created: User:Technical writer 1 (19 Jun 2008)
Last edited: hamishwillee (15 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

Simultaneous audio playback and recording (full duplex) may result in echo and/or feedback loop when certain wired headsets are attached and audio is being streamed in uncompressed PCM16 format.

How to reproduce

The example application S60 Platform: Full-Duplex Audio Example supports four codecs: AMR, G.711, G.729, and iLBC.

With the following modifications, also support for PCM16 format can be added:

// Specify PCM16 fourCC as follows:
fourCC = TFourCC(' ', 'P', '1', '6');

// Sample rate:
conf.iRate = EMMFSampleRate16000Hz;
// Buffer size:
const TUint KBufferLength = 0x2000;

Running full-duplex audio with this configuration works fine on most devices, but produces echo on the Nokia N95 when used with the AD-54 headset.

Solution

No solution exists.

69 page views in the last 30 days.

Was this page helpful?

Your feedback about this content is important. Let us know what you think.

 

Thank you!

We appreciate your feedback.

×