story of Mel
ajp166 at verizon.net
Thu Feb 23 12:24:13 CST 2017
On 2/23/17 11:16 AM, Bill Gunshannon wrote:
> From: cctech [cctech-bounces at classiccmp.org] on behalf of allison [ajp166 at verizon.net]
> Sent: Thursday, February 23, 2017 11:04 AM
> To: cctech at classiccmp.org
> Subject: Re: story of Mel
> On 2/23/17 3:23 AM, Pontus Pihlgren wrote:
>> On Wed, Feb 22, 2017 at 02:18:50PM -0500, allison wrote:
>>> The sound (not music) card was actually a internally built and not sold
>>> (that I know of).
>> There must have been a few though, since several claim to have one and
>> it even showed up on ebay.
>> (I'm just hoping I'l get lucky and find one.. I have an 11/73 with
>> graphics, it would be nice to add sound to it)
> Last time I needed just a beep it was the DTR line on the async card
> being flipped
> by a simple loop. If you flip it and leave it you get a click....
> Obviously you need
> an amplifier(maybe or a transistor) and speaker to hear it.
> The sound card I have is not part of the OS (any) and there is no
> support so it does
> nothing without code and a d/a or even a few bits will do sound.
> FYI there was many articles in the micro world on doing sound and music
> in Byte and DDJ back when (1975 to mid 80s) in the time before PCs and
> sound cards. For example Processor Technologies Music system.
> See http://www.sol20.org/manuals/music.pdf for the manual on that.
> I believe it was Polymorphic systems that did a polyphonic sound system
> for z80 computers.
> Those are samples of interest connected with computer music back then.
> I always thought music in the old days was more about MIDI and letting
> something designed for it do the work ala Usenix Nashville 1991.
Right after the creation of dirt was the first Philadelphia computer
I have the vinyl created back then for it and its interesting listening.
This is how it was done when programmer wrote code. ;)
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