Re: make beep

You could try running a real-time kernel, that may remove the gap between 
removal and it registaring.
https://help.ubuntu.com/community/UbuntuStudio/RealTimeKernel

On Friday, June 03, 2011 08:31:28 PM Carl Karsten wrote:
> I want a light weight way to make a beep using standard tools - no
> writing C, just install from standard repos, or best if it is part of
> the ubuntu-desktop install.   It should respect the system's
> mute/volume controls.
> 
> I am making my laptop beep and blop when I plug/unplug a card.  Turns
> out that the unplug events happen at 2 and 12 seconds after the card
> has actually left the slot.  And now I am paranoid that weird things
> will happen if I plug something in before all the remove events have
> fired.  So I want distinctive noises.  Super cool would be to start a
> tone playing at the 1st remove event and turn it off at the 2nd.
> 
> I have come up with the following:
> 
> /usr/bin/sox -n -d synth .1 sin 700; /usr/bin/sox -n -d synth .1 sin 500
> 
> -n = no input file
> -d = use default alsa device
> synth .1 sin 700 = .1 second 700hz sin wave
> 
> Here is it being used in udev:
> 
> /etc/udev/rules.d/pci-beep.rules
> 
> SUBSYSTEM=="pci", ACTION=="add", RUN+="/usr/bin/sox -n -d synth .1 sin
> 500", RUN+="/usr/bin/sox -n -d synth .1 sin 700"
> 
> SUBSYSTEM=="pci", ACTION=="remove", RUN+="/usr/bin/sox -n -d synth .1
> sin 700", RUN+="/usr/bin/sox -n -d synth .1 sin 500"
> 
> SUBSYSTEM=="firewire", ACTION=="remove", RUN+="/usr/bin/sox -n -d
> synth .3 sin 700"
> 
> My biggest problem with this is the small gap between the 700 and
> 500s.  and sox can do all sorts of stuff, so having a kernel process
> spawing it makes me grumpy.
> 
> and I just wanna know what my options are.
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