Psion Teklogix 7527S User's Guide download pdf (Page 173)

Chapter 16: Sound

Sound Hardware

Psion Teklogix Mobile Devices SDK Developers Guide 161

16.1 Sound Hardware

The Mobile Devices SDK controls beepers and speakers on Psion Teklogix computers as well as

playing beeps and waveform audio. Beepers, which are capable of providing louder sounds than

speakers, are useful in environments with high background noise levels. Beepers and speakers are

available as follows:

The 7530 has both a beeper and a speaker. When an application plays a beep on a 7530, it is

played on the beeper and no attempt is made to play it on the speaker.

16.2 Playing Beeps

The following table defines the valid ranges for parameters that define beeps in the Mobile

Devices SDK:

On devices with beepers only, this value is overridden by the volume setting in the Control Panel

and has no effect. The volume value specified in the API call is only used on devices with wave-

form audio support through a speaker.

16.3 Playing WAV Audio Format Files

The Mobile Devices SDK enables the playing of WAV audio format files on Psion Teklogix com-

puters that have a speaker. Any valid WAV file that fits into memory can be played.

Psion Teklogix speakers can play all audible frequencies.

WAV files are played by specifying one of the following:

•A WAV file.

• A WAV file contained in a resource file—a JAR file or a ZIP file.

• A system sound.

• Waveform audio data contained in memory.

The following options are available when a WAV file is played:

Psion Teklogix Computer Beeper Speaker

7530

Yes Yes

7535 Yes No

8515 Yes No

8525 Yes No

8530 Ye No

Ikôn No Yes

NEO Yes No

WORKABOUTPRO No Yes

Parameter Range

Frequency Range (Hz) 800 to 3000

Beep Duration (ms) 1 to 2000

Volume (% of maximum)

0 to 100

1 2 ... 168 169 170 171 172 173 174 175 176 177 178 ... 261 262

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Psion Teklogix 7527S User's Guide Page 173