how did Tao do this?

[Gunstick]

Hi

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


Thanks,
Georges

[Nyh]

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.

Hans Wessels

[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!

[NiceGuyUK]

DMA trickery. The music (like most of the Nostalgic Demo tunes) is in his new TSD format. From the Cream website :-

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

[Nyh]

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!

Hans Wessels

[Gunstick]

DMA trickery.

yeah, so... any more details?
This is just explaining one mystery with another

Georges

[Stefan jL]

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.

[Gunstick]

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

[Stefan jL]

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
Why not try to contact Tao directly: http://www.creamhq.de/
Or other Sync-Buzzer guy's (like GwEm) http://www.preromanbritain.com/maxymiser/

[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

[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

[Twilighte]

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.

Incidentally i emailed tao about a week ago but as yet no reply.

[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.

[Twilighte]

Well that interview was very interesting but unfortuately it did not give any insight into how sync-buzzer or buzzer works.

[Gunstick]

Well you may be right. As we found out here: viewtopic.php?f=68&t=3306&st=0&sk=t&sd=a&start=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.