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Archived:AAC recording for different sampling rates using Symbian C++

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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}}.

Article Metadata
Tested with
Devices(s): Tested on: Nokia N93,
Nokia N78,
Nokia 6210 Navigator
Compatibility
Platform(s): S60 3rd Edition, FP1
S60 3rd Edition, FP2
S60 3rd Edition FP2
S60 3rd Edition FP1
Article
Keywords: AAC Recording, Audio
Created: User:Kbwiki (05 Mar 2009)
Last edited: hamishwillee (14 Jun 2013)

Description

Not all the sampling rates and channel settings described in TMdaAudioDataSettings will work on all devices for PCM recording. For example, the Nokia 6210 Navigator records PCM audio only at 8kHz, 16kHz, and 48kHz sampling rates. If the samples need to be converted to AAC with a different sampling rate (such as 24kHz or 32 kHz), the PCM data must be resampled to the required sampling rate before passing it to the CMMFCodec for encoding.

Solution

Implement an upsampler or downsampler algorithm to convert each recorded PCM audio buffer to the desired sampling rate before passing it to the CMMFCodec for AAC encoding.

This page was last modified on 14 June 2013, at 05:10.
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