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Audio tone player fails to generate short tones (Known Issue)

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Article Metadata
Tested with
Devices(s): All (S60)
Platform(s): S60 3rd Edition
S60 5th Edition
S60 5th Edition
S60 3rd Edition (initial release)
Keywords: CMdaAudioToneUtility
Created: User:Kbwiki (17 Jun 2010)
Last edited: hamishwillee (30 May 2013)


The CMdaAudioToneUtility class enables the playback of tone sequences and DTMF (Dual-Tone Multi-Frequency) strings.

The tones are generated by parsing the playback string and sending commands to the audio server note-by-note, causing a several-millisecond delay in starting the playback. Because of the way tone playback/stop commands are grouped together, trying to play very short tones (< 15 ms) may produce only a faint clicking noise or no sound at all.


When relatively quick playback of short sounds is needed, WAV files and Audio Streaming API should be used instead. Tone generator is not capable of reliably generating tones shorter than 10-15 ms.

This page was last modified on 30 May 2013, at 02:28.
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