- Stopping a non-locking sound
- Size of sound files
- Locking sound
- Sound and component
In french: Son
Plays a sound in WAV format. This sound can be:
- stored on the disk.
- included in the library (.WDL).
- in an HFSQL memo.
This function can also be used to:
- play a system sound.
- play a sound of a given frequency for the desired time.
Remark: A sound card must be installed on the computer. The sound will be played according to the Windows settings (volume, balance, quality, etc.).
<Name of WAV file>: Character string
Full or relative name of file to play. This file can be:
- a WAV file.
- an audio file corresponding to all the formats supported by the OS (wav, mp3, 3gp, ogg, etc.). A summary of the supported audio files is available from the following address: http://developer.android.com/guide/appendix/media-formats.html.
- Android does not support 32-bit wav files.
- This parameter can correspond to a URL. In this case, it is necessary to add the INTERNET permission when generating the application.
- a file in wav format.
- a file in mp3, wav, wma or m4a format.
<Option>: Optional integer constant
Sound execution mode:
|The code continues to run as soon as the sound is started.|
|soundLoop||The sound is played in a loop.|
Caution: The file to play must be found on disk and not in the library (WDL file).
|soundWait||The code is locked as long as the sound is not entirely played.|
Playing a sound of a given frequency during the requested time Hide the details
<Result> = Sound(<Frequency> , <Duration>)
- True if the sound was played,
- False otherwise.
Remark: Until Windows 7, the sound is played on the inside speaker of the PC. From Windows 7, the sound is played on the sound card.
<Frequency>: Unsigned integer
Frequency of the sound in Hertz.
Remark: For the versions earlier than Windows 7, only the audible frequencies can be used (between 37 and 32767).
<Duration>: Unsigned integer
Duration (in milliseconds) during which the sound is played. Caution: the sound is locking. This parameter can correspond to:
- an integer corresponding to the number of milliseconds,
- a Duration variable,
- the duration in a readable format (e.g., 1 s or 10 ms).
Stopping a non-locking sound
A sound played in non-locking mode can be stopped by the following code, called on a user action for example (click, control modification, etc.):
Size of sound files
Using large WAV files may trigger several problems (not enough RAM to load the sound, system stopped depending on the Windows version, etc.). For large ".WAV" files (several dozen megabytes), we recommend that you use the MCI functions
A sound is necessarily locking:
- If the sound is stored in a WINDEV library (.WDL file).
- If the sound comes from a binary memo.
Sound and component
Sound is a non-blocking function by default. To use Sound in a component without locking the application, you must comply with the following constraints:
- The file corresponding to the sound must not be found in the WDL or in the component.
- The file corresponding to the sound must be found in the EXE directory of the application.
Business / UI classification: UI Code
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