Date: Mon, 08 Nov 2004 20:25:12 +0100 From: "Poul-Henning Kamp" <phk@phk.freebsd.dk> To: "Kevin Oberman" <oberman@es.net> Cc: Paul Richards <paul@originative.co.uk> Subject: Re: cvs commit: src/sys/kern subr_param.c Message-ID: <11439.1099941912@critter.freebsd.dk> In-Reply-To: Your message of "Mon, 08 Nov 2004 11:19:05 PST." <20041108191905.4D47B5D04@ptavv.es.net>
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In message <20041108191905.4D47B5D04@ptavv.es.net>, "Kevin Oberman" writes: >> > Can we play music by modulating the value of hz? :) >> >> I remember some code for the Commodore Pets that you could use to play >> notes on a nearby radio by tweaking some spinning loops. Quite a neat >> trick at the time since there wasn't any sound hardware. > >Actually, this technique predates the PET by any years. I know that we >could play music on the PDP-1 and that goes back to the late '05s or >early 60's. I did it on my PDP-11 in the early '70s. I also heard a CDC >MASStore tape system played as an organ by adjusting the tape movement >in the vacuum columns. The first danish computer (DASK) built in 1956... had a loudspeaker connected to a bit in one of the registers and music were played as a demo. The successor (GIER) has a simulator which also simulates the similarly attached loudspeaker: http://www.datamuseum.dk/site_dk/rc/giersimulator/ I have so many computers with PCI slots running without a lid in my basement that the commercial "FM100" station can't be received in a 20m radius around my house... -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 phk@FreeBSD.ORG | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence.
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