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On Wednesday, April 15, 2015 12:25:03 AM lee wrote: |
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> |
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> Hi, |
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> |
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> when the pcspkr module (or how it's called; I haven't compiled atm) is |
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> loaded, somehow the built-in speaker is used to sometimes beep. There |
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> also seems to be the option to play this beep via the sound card --- |
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> which usually sounds nicer. |
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> |
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> How is this done? Do I need to load a different module for that, or |
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> does it require to use some sort of additional software? |
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If you mean how to configure the kernel for it then just load the right module. |
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I remember seeing a "PC Speaker Emulation" or similar module but I can't find |
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it now so it may be gone. |
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Anyways, this only applies to the console (VT). Software just writes the BEL |
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character (0x07) to it's terminal (stdout) to play a beep. You can also open |
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"/dev/console" directly and play this character or use ioctl calls to play |
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sounds with different frequencies and duration but this requires root |
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privileges. Modern desktop terminal emulators will already be using the sound |
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card to play the BEL character. On KDE for example you can choose any sound |
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file to play or just show a notification. |
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-- |
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Fernando Rodriguez |
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