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Sound_Speaker
SoundDMA
» SWI Calls
» Sound_Speaker
Sound_Speaker
(SWI &40143)
| Entry | |
|---|---|
| R1 | Speaker setting: |
| 0 → No change (just return previous setting) | |
| 1 → Turn speaker off | |
| 2 → Turn speaker on | |
| Other values reserved |
| Exit | |
|---|---|
| R0 | Previous speaker setting (1 or 2) |
Use
This SWI is used to turn the machines internal speaker on or off.
If a machine does not have an internal speaker, or has no control over the speaker power, this SWI will always report that the speaker is on.
On RISC OS 5 this SWI simply calls SoundCtrl_SetMix and SoundCtrl_GetMix to mute or unmute the speaker.
See also
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