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Trifox
Account closed
Registered: Mar 2006
Posts: 108 |
sid timing ntsc/pal
hi c64 experts, i am wondering how to play a tune on ntsc AND PAL machines with the same speed, using the rasterinterrupt leads to different timing on ntsc, i heard about a timer interrupt in c64 is this one suitable for using in a playing routine =?! |
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enthusi
Registered: May 2004
Posts: 677 |
0.5 Hz?
Ignore it :) No two SIDs sound the same anyway.
If you want accuracy dont use SID.
Sorry to say that.
loving it all,
enthusi |
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Raf
Registered: Nov 2003
Posts: 343 |
woah ;p you sarcastic bastards ;-)
SID's freq changes with driving clock;s freq. there is approx 40KHz diff so it's about 4% on the SID too (actually depending on note playing as LAxity said).
once I heard there is minor difference but I never tried to actually check it (honestly I raher don't care about NTSC living in PAL zone ;- ). you may try to use sidplay2/w and select "adjust to" in SID type config to have approximation of what would you get .
www.vulture.c64.org |
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cadaver
Registered: Feb 2002
Posts: 1160 |
IMO pitch/tempo change is bearable, ADSR bugs and note trigger failures are worse. Liked Graham's suggestion to keep amount of clock cycles same, since that's what SID cares about internally. |
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