Date: Sun, 27 Dec 2009 01:19:49 +1100 (EST) From: Ian Smith <smithi@nimnet.asn.au> To: Gary Kline <kline@thought.org> Cc: freebsd-questions@freebsd.org Subject: Re: clicky driver Message-ID: <20091227001029.N28370@sola.nimnet.asn.au> In-Reply-To: <20091226120028.0A8FC10657A0@hub.freebsd.org> References: <20091226120028.0A8FC10657A0@hub.freebsd.org>
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On Fri, 25 Dec 2009 20:23:22 -0800 Gary Kline <kline@thought.org> wrote: > On Sat, Dec 26, 2009 at 01:10:45AM +0000, Chris Whitehouse wrote: > > Gary Kline wrote: > > >>On Fri, 25 Dec 2009 13:37:13 -0800, Gary Kline <kline@thought.org> wrote: > > >>> at first I'm lookings for a "cots" (commericial, off-the-shelf) > > >>> solution. The XO has stereo speakers and so do the notebooks. > > >>> I am thinking of the 'PC speaker'; something that would sound for > > >>> around a 25th/second, very low and with at least some loudness > > >>> control. > > > > Hi Gary, > > > > someone posted recently about the play-string language for /dev/speaker, > > see speaker(4). Could you do something with that? > > > > btw thanks to whoever posted the play-string code for frere jaques - > > cracked me up :) > > > > Chris Yeah :) I play little tunelets on certain battery power events, when some IP gets blacklisted by some logtailing script, things like that. > Wow; the stuff I've never heard about:-) --I just tried spkrtest > and have no /dev/speaker. # kldload speaker device speaker isn't in kernel GENERIC. If it doesn't work immediately, try adding speaker_load="YES" to /boot/loader.conf .. this assumes that your box _has_ a working speaker, eg beeps once while booting? Some laptops use the sound'card' for speaker, and provide a mixer level. > The short answer [Guess] is no, I dont think so. If getting the > keys to have an auditory feedback with beeps or shorter clicks were > that easy, it would have been done after 15 years. Even Linux > lacks this--and I'd bet Minux too. > > What I've got to do is pick up where I kwit ten years ago with the > kernel driver code and drop the the code to make the speaker-audio > create tiny, brief clicks, preferably low, thunky sounds like ye > ancient IBM Selectrics. You can do quite a lot with various tempos, intervals and frequencies; see speaker(4) and play around. Making a short click or thunk! should be easy enough, but spkrtest and echoing playstrings >/dev/speaker are userland processes; I've no idea how much 'fun' it would be to invoke /dev/speaker ioctls from the kbd drivers. But if you're really keen: % find /sys/ -name "speaker*" -o -name "spkr*" cheers, Ian
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