Sound effects

• [synit]/protocols/schemas/soundEffects.prs

From time to time, it makes sense for the device to use sound to communicate with the user.

Implementation. As of October 2022, the implementation resides within classes RingToneDaemon and SoundEffectsDaemon in the SqueakPhone Smalltalk image.

Continuous sounds

Continuous sounds such as a user’s ringtone may be produced by asserting ContinuousSound with an appropriately-type-tagged sound file (such as an mp3 file) as data. In response, the sound effects daemon play the file in a loop and will assert ContinuousSoundPlaying.

ContinuousSound = <continuous-sound @data mime.Value> .
ContinuousSoundPlaying = <continuous-sound-playing> .

Alert sounds

One-off sound effects such as the notification of a received SMS may be produced by sending an AlertSound message with an appropriately-type-tagged sound file (such as an mp3 file) as data. In response, the sound effects daemon will play the file once and will assert AlertSoundPlaying until the playback is complete.

AlertSound = <alert-sound @data mime.Value> .
AlertSoundPlaying = <alert-sound-playing> .

Copyright © 2021–2023 Tony Garnock-Jones, CC BY 4.0