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tlr
Vic 20 Devotee
Joined: 04 Oct 2004
Posts: 212
Location: Stockholm/Sweden
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 Posted: Mon Oct 12, 2009 1:27 pm Post subject: Datapop! (new music demo, new player) |
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Name: Datapop!
Author: tlr
Release Date: 2009-10-12
Download: tlr_-_datapop_vic20.zip
Audio: tlr_-_datapop_vic20.mp3 (sampled from PAL hw)
(Pouet: Datapop!)
Datapop is a music demo for the unexpanded Commodore Vic-20 computer.
Runs best on PAL but works on NTSC (wrong tempo), should run in all
memory configurations.
The core of the demo is my new player: Ultraplayer!
Hold <SHIFT> to see some player gore.
See the included README.txt for details.
Last edited by tlr on Fri Oct 16, 2009 11:58 am; edited 2 times in total |
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Mermaid
Vic 20 Poser
Joined: 19 Jun 2004
Posts: 18
Location: Kristiansund, Norway
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| Posted: Mon Oct 12, 2009 3:00 pm Post subject: |
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Sounds great! :)
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Happy owner of Mega-Cart #0178 :) |
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carlsson
Class of '6502
Joined: 10 Mar 2004
Posts: 5511
Location: Västerås, Sweden
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| Posted: Tue Oct 13, 2009 12:29 am Post subject: |
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| Quote: | | Ultraplayer uses tight control of the 4 oscillators to provide 9 bits of frequency resolution and up to 6 bits of PWM. All you hear is the original VIC oscillators. No volume register modulations. |
Hm, is this approach the same as TBC just implemented?  I know Stockholm is a small city but it seems quite remarkable if two people within a half year made pretty much the same thing.
However I wonder how IRQ/CPU intensive the tight control is. For applications where the music is prioritized I am sure these new routines are superb but once you start to add advanced graphical effects requiring both CPU time and exact timing, the music player is preferred to take as few raster lines as possible.
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Anders Carlsson
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Diddl
Vic 20 Devotee
Joined: 10 Jun 2009
Posts: 230
Location: Austria
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| Posted: Tue Oct 13, 2009 12:30 am Post subject: |
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Ultraplayer - very nice work!
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Final Expansion 3, the most powerful cartridge for your VIC-20 |
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Mermaid
Vic 20 Poser
Joined: 19 Jun 2004
Posts: 18
Location: Kristiansund, Norway
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| Posted: Tue Oct 13, 2009 1:31 am Post subject: |
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| carlsson wrote: | | For applications where the music is prioritized I am sure these new routines are superb but once you start to add advanced graphical effects requiring both CPU time and exact timing, the music player is preferred to take as few raster lines as possible. |
It'd be awesome for title tunes for games though :)
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Happy owner of Mega-Cart #0178 :) |
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tlr
Vic 20 Devotee
Joined: 04 Oct 2004
Posts: 212
Location: Stockholm/Sweden
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| Posted: Tue Oct 13, 2009 2:06 am Post subject: |
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| carlsson wrote: | | Quote: | | Ultraplayer uses tight control of the 4 oscillators to provide 9 bits of frequency resolution and up to 6 bits of PWM. All you hear is the original VIC oscillators. No volume register modulations. |
Hm, is this approach the same as TBC just implemented? I know Stockholm is a small city but it seems quite remarkable if two people within a half year made pretty much the same thing. |
I don't know him or what approach he uses and I don't think he knows my approach.
I did hear the mp3 he posted yesterday in the games forum so I decided it was time to take my player of the shelf and do a first release. 
PWM is something I've been trying to do for quite a while using the same principle but didn't fully realize exactly how tight the control has to be.
I started implementing it mid December 2008 using new insights into the internals of the oscillators.
The new player and this music was completed by the end of January 2009/beginning of February 2009.
| carlsson wrote: | | However I wonder how IRQ/CPU intensive the tight control is. For applications where the music is prioritized I am sure these new routines are superb but once you start to add advanced graphical effects requiring both CPU time and exact timing, the music player is preferred to take as few raster lines as possible. |
In Ultraplayer the control is quite CPU intensitive, both NMI and code outside interrupt.
(enabling PWM for less voices makes it a bit less CPU intensitive)
The aim was maximum control and to make it fit on unexpanded VICs. |
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Vic20-Ian
Vic 20 Enthusiast
Joined: 24 Aug 2008
Posts: 196
Location: Isle of Man
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| Posted: Tue Oct 13, 2009 2:15 am Post subject: |
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I love it and I don't usually like demo music at all.
I love the way it is put together.
Holding down Shift for a glimpse of the Vic20 "Matrix" is fun too!
Now if you could get it to sound like the violin like qualities of Brian May's guitar and play Queen's Keep Yourself Alive on the Vic I will have all my favourite things combined.
Great work. Thank you.
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Vic20-Ian
The best things in life are Vic-20
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Boray
Musical Smurf
Joined: 03 May 2004
Posts: 2443
Location: Sweden
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tlr
Vic 20 Devotee
Joined: 04 Oct 2004
Posts: 212
Location: Stockholm/Sweden
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| Posted: Tue Oct 13, 2009 2:06 pm Post subject: |
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Thanks for the positive comments!
I've added an mp3 download to the original post. (sampled from my PAL Vic-20) |
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