how did Tao do this?

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Gunstick
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how did Tao do this?

Post by Gunstick »

Hi

please explain how this works?
http://www.youtube.com/watch?v=h5x1hWBexG8


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Nyh
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Re: how did Tao do this?

Post by Nyh »

Gunstick wrote:please explain how this works?
http://www.youtube.com/watch?v=h5x1hWBexG8
What is so special about this screen?
Low res, pixels with rasters and a mouse cursor. Nice musix.

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Re: how did Tao do this?

Post by alexh »

Gunstick is talking about the music effects.
End credits part featuring incredible music from TAO using sync buzzer effect and emulates a kind of analog band pass filter! Unbelievable!
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NiceGuyUK
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Re: how did Tao do this?

Post by NiceGuyUK »

DMA trickery. The music (like most of the Nostalgic Demo tunes) is in his new TSD format. From the Cream website :-
Cream wrote:TSD
TSD is a DMA-based format. It emulates the main features of the C64 SID-soundchip. Songs using this player have been first used in "...do things. These songs can be replayed using "Jam".
The website has a link to a ZIP full of TSD songs for playing in JAM
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Re: how did Tao do this?

Post by Nyh »

alexh wrote:Gunstick is talking about the music effects.
I should have known. I didn't see this was a post in YM rocking. Some nice musix indeed!

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Re: how did Tao do this?

Post by Gunstick »

NiceGuyUK wrote:DMA trickery.
yeah, so... any more details?
This is just explaining one mystery with another :-)

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Stefan jL
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Re: how did Tao do this?

Post by Stefan jL »

NiceGuyUK wrote:DMA trickery. The music (like most of the Nostalgic Demo tunes) is in his new TSD format. From the Cream website :-
That tune is not using DMA it's a standard ST/YM2149 tune with the sync-buzzer effect.
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Re: how did Tao do this?

Post by Gunstick »

Stefan jL wrote: That tune is not using DMA it's a standard ST/YM2149 tune with the sync-buzzer effect.
nice, but that was already written in the youtube description. So I guess I wait for Leonard to come along and give me the technoguru explanation :-)
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Re: how did Tao do this?

Post by Stefan jL »

Gunstick wrote: nice, but that was already written in the youtube description.
Yes, but that was just a reply to NiceGuyUK comment as he did not understand :wink:
Why not try to contact Tao directly: http://www.creamhq.de/
Or other Sync-Buzzer guy's (like GwEm) http://www.preromanbritain.com/maxymiser/
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Re: how did Tao do this?

Post by lotek_style »

Gunstick:

TSD is a DMA-based format. It emulates the main features of the C64 SID-soundchip.

For deeper technical stuff you should mail TAO directly: Tao [FuckSpamBots] creamhq.de
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Re: how did Tao do this?

Post by lotek_style »

Maybe this might bring some light into the syncbuzzer technique... as far as I know he discovered it by mistake :)

http://www.myatari.net/issues/may2003/tao.htm
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Re: how did Tao do this?

Post by Twilighte »

lotek_style wrote:Maybe this might bring some light into the syncbuzzer technique... as far as I know he discovered it by mistake

http://www.myatari.net/issues/may2003/tao.htm
It might have done had that link worked but perhaps it just expired.
Anywayz, i'm very new to this forum having wollowed in the Oric for too long. :S
But back to Tao, i reckon Buzzer acts on the EG cycle register. Because the register uniquely triggers the envelope everytime it is written to, by writing alternate values at the frequency of the note, it is possible to create complex waveforms.
Or even just a single value that defines a slope envelope would be enough to produce interesting sounds by then modifying the EG period. :)

Not sure if my terminology is up to scratch with Atari ym stuff since i am much more familiar with the AY-8912 of the Oric. :P

Incidentally i emailed tao about a week ago but as yet no reply. :(
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Re: how did Tao do this?

Post by lotek_style »

Hm well first... the article worked perfectly one year ago when I wrote the post :)

well here's archive org:

http://web.archive.org/web/200801202051 ... 03/tao.htm


Tao didn't reply to any of my mails since weeks... I'm not sure if he's still reading the mails
or if he's just too busy.
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Re: how did Tao do this?

Post by Twilighte »

Well that interview was very interesting but unfortuately it did not give any insight into how sync-buzzer or buzzer works. :(
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Re: how did Tao do this?

Post by Gunstick »

Well you may be right. As we found out here: http://www.atari-forum.com/viewtopic.ph ... =15#p35126
writing the envelope form register (register 13) restarts the envelope even if the written value is the same already there. So if we take the SID interrupt, but instead of switching on/off the volume we do a similar thing on the envelope there are interesting waveforms to create.
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