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Forums > CSDb Entries > Event id #2967 : 25Hz Music Compo 2020
2020-07-01 20:53
Jammer

Registered: Nov 2002
Posts: 1289
Event id #2967 : 25Hz Music Compo 2020

Welcome to the first and hopefully not the last edition of 25Hz Music Compo!

Basic premise is to create a piece of music with player that updates SID registers at rate of 25Hz or to put it in other words - every 2nd frame. There are very few tunes out there playing at such slow speed but maybe it's the right time to change it? :) Here are couple of examples:

Low Frequency
Half-Funk


Compo rules:

1. No covers and remixes allowed.
2. No upper limit for playtime.
3. No limit of tunes per author but playtime of each has to be at least 2 minutes.
4. Use any editor that allows you to use such playback rate or go for custom player if you need. Goat Tracker surely offers 25Hz playback (Multispeed 0).

Good luck and have fun! <3
 
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2020-07-01 21:11
Jammer

Registered: Nov 2002
Posts: 1289
Do we have NTSC musicians at all nowadays? :D
2020-07-01 21:22
acrouzet

Registered: May 2020
Posts: 80
Some of my covers play at 60hz (using the CIA timer) in order to get more accurate tempos, but are still in PAL. This is just cause SidTracker64 doesn't support NTSC (and all of the players are in PAL anyways). I guess that counts somewhat.

Anyway, neat idea for a compo! I might participate.
2020-07-01 21:31
Jammer

Registered: Nov 2002
Posts: 1289
Does SidTracker64 support half-speed?
2020-07-01 21:35
Ksubi
Account closed

Registered: Nov 2007
Posts: 87
I'm looking forward to this compo! Always loved Conrad's tune.
2020-07-01 21:37
Jammer

Registered: Nov 2002
Posts: 1289
IMPORTANT MESSAGE:

Results will be based entirely on CSDb votes. There's going to be one week of voting phase after compo time.
2020-07-01 21:44
acrouzet

Registered: May 2020
Posts: 80
Quote: Does SidTracker64 support half-speed?

Yes. It strangely supports all whole number frequencies between 25 Hz and 240 Hz, which is why you might find a lot of ST64 tunes with weird CIA timings. (This also presents cool opportunities for tuning multispeed effects to specific keys.)
2020-07-01 22:50
Frantic

Registered: Mar 2003
Posts: 1627
defMON can be set to play at half speed, since you can explicitly set the timer value for the timer that drives the player. Maybe most other editors can do that too?
2020-07-02 01:15
McMeatLoaf

Registered: Jan 2005
Posts: 105
Quote: Yes. It strangely supports all whole number frequencies between 25 Hz and 240 Hz, which is why you might find a lot of ST64 tunes with weird CIA timings. (This also presents cool opportunities for tuning multispeed effects to specific keys.)

Makes me wish that Goattracker 2 could support finetuned CIA timings the same way it allows for non-440Hz tunings (which sadly doesn't seem to be used that much).
2020-07-02 05:31
Ray Manta

Registered: Jun 2014
Posts: 10
Presume SID Wizard can do half speed :)
2020-07-02 08:55
Conrad

Registered: Nov 2006
Posts: 833
Quote: Presume SID Wizard can do half speed :)

Unfortunately not.

But you could go into Vice monitor and add a quick hack like this:

a 0380:
.0380:
	lda #$00
	eor #$80
	sta $0381
	bmi $038c
	jsr $10d3     <-- (this is the address shown in the "Normal" configuration, might be different on light / bare / extra)
	rts


a 1003
.1003:
	jmp $0380


... or beg Hermit for another version. ;)
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