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carlsson
Registered: Nov 2002
Posts: 41 |
SID out of tune?
Recently a Speccy person elsewhere posted that:
Quote:The SID .. tended to be out of tune at extreme frequencies (the Speccy's beeper also suffers this problem). Where as the AY is much closer to perfect pitch.
Apart from being typical C64/SID-bashing (most Speccy people despise the SID for muddy sound blah blah blah), does the poster have a point? I can't recall I ever heard a SID tune that suffers from lack of frequency resolution so it sounds out of tune, except from when it was done on purpose or the musician didn't bother to get a good frequency table.
I know from personal experience that the VIC-20 has a very limited frequency resolution, but it is a completely different chip and supposedly nobody mixes up the two. Maybe if one uses very high frequencies (several thousand Hz?) on the SID, these notes will not be in tune, but few people can hear the difference, and it depends on monitor or other speakers if they can reproduce the notes faithfully. |
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jailbird
Registered: Dec 2001
Posts: 1578 |
Quote: Calculator scene rulez (TI-83 4-eva!!!) :D
No way dude, HP-19C would kick TI-83's arse! It has a thermal printer! |
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Oswald
Registered: Apr 2002
Posts: 5095 |
jailbird, haha well this is a well known pattern. This is why amiga ppl hate PC, while the pc dudes doesnt give a shit, or plus4 wars with the c64, the ones with the weaker machine always try to prove they have the superior hardware.
graham, zp adressing cant be really looked at like 128 index regs, as the manipulation of those 'registers' is much slower than of the real ones. |
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Shadow
Account closed
Registered: Apr 2002
Posts: 355 |
Quote: No way dude, HP-19C would kick TI-83's arse! It has a thermal printer!
Bah, let mee se you thermal print this:
http://sdw.mikhailov.biz/prods.html?prodplatform=6
:) |
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jailbird
Registered: Dec 2001
Posts: 1578 |
Quote: Bah, let mee se you thermal print this:
http://sdw.mikhailov.biz/prods.html?prodplatform=6
:)
But... but... HP-19C has pimpy red screen which glows in the dark!
Seriously, very cool stuff there! :D |
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McMeatLoaf
Registered: Jan 2005
Posts: 108 |
This may be waaay OT, but what about the speed of e.g. Atari 8-bit? (I think most, if not all models are clocked at 1.79 MHz) |
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Graham
Account closed
Registered: Dec 2002
Posts: 990 |
Quote:graham, zp adressing cant be really looked at like 128 index regs, as the manipulation of those 'registers' is much slower than of the real ones.
Much slower? 1 cycle slower... Ask the Z80 people if 1 cycle is "much" :D |
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Graham
Account closed
Registered: Dec 2002
Posts: 990 |
Quote: This may be waaay OT, but what about the speed of e.g. Atari 8-bit? (I think most, if not all models are clocked at 1.79 MHz)
It depends on what you do. On the Atari 8-bit computers you have a clock speed of 1.79 MHz, but sadly the bus speed is also 1.79 MHz so if you have a normal bitmap or character display the DMA load will effectively leave you ~1.2 MHz. You only get close to that 1.79 MHz if you turn off the display.
On C64 most DMA cycles are "invisible" to the CPU, so only the badlines every 8 rasterlines slow down the CPU. |
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