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Forums > CSDb Discussions > The 6581 has fallen into oblivion
2022-07-17 14:14
Laurent

Registered: Apr 2004
Posts: 40
The 6581 has fallen into oblivion

Musicians seem to have lost interest for the original 6581 model.

Is it because of how it sounds (low resonant filter, combined waveforms) or because of technical challenges (huge filter variability between revisions, quality of filter emulation) ?
There are so many 6581 tunes that we all enjoy that I cannot believe the "sound" is the issue.
The funky distorted 6581 filter is absolutely loveable, not better or worse than 8580's, just different.

There are so many awesome examples..
Googachild
Miami Vice
4-Mat's Filter
Dirty Pair

Now that reSID is doing a good job at emulating the 6581, I assume one of last issues is that musicians have no guarantee that a tune will be played back correctly, with the same filter characteristics that they used when composing their tunes. Especially when they're played on a real c64, it just cannot work perfectly.
As of today, even if we wanted to organize a 6581 music competition it would be laborious to play them back correctly even with an emulator.
Some extra info could be certainly added to a .sid header, but running the .prg in Vice would be more difficult, the SID player init code would have to write to some unused SID addresses to "configure" the SID. This would please all emulators but would have no effect on the real thing (except if it had an emulated chip)..

Do you believe the 6581 is doomed ? :(
2022-07-17 14:42
Jammer

Registered: Nov 2002
Posts: 1289
Some musicians prefer 6581 and tailor their tunes for it strictly. I wouldn't fear too much, tbh ;) Kinda contrived topic.
2022-07-17 14:51
Mibri

Registered: Feb 2018
Posts: 197
One word: Mutetus.
2022-07-17 15:39
DeMOSic

Registered: Aug 2021
Posts: 126
Its a shame the 6581 has a VERY small scene, but there are still some people using it (And more people should too!) The 6581s Filter Distortion may be sometimes a pain but use it good and OOOOOH your gonna get some good stuff!

Quoting Mibri
One word: Mutetus.

Yeah Mutetus is the KING of 6581.
2022-07-17 17:26
Adam

Registered: Jul 2009
Posts: 321
Quoting Laurent
Musicians seem to have lost interest for the original 6581 model.

I haven't.

Quote:
I assume one of last issues is that musicians have no guarantee that a tune will be played back correctly

this has always been an issue.

Quote:
As of today, even if we wanted to organize a 6581 music competition it would be laborious to play them back correctly even with an emulator.

musicians can clearly state what model 6581 they used, or a compo could recommend what models of 6581 they should use. not complicated.

Quote:
Do you believe the 6581 is doomed ? :(

how can it survive four decades and somehow only now in 2022 it's doomed? makes no sense to me at all.
2022-07-17 17:43
Oswald

Registered: Apr 2002
Posts: 5017
Evolver
2022-07-17 19:03
F7sus4

Registered: Apr 2013
Posts: 112
Quoting Adam
musicians can clearly state what model 6581 they used, or a compo could recommend what models of 6581 they should use. not complicated.


It still doesn't help much since the filter offset discrepancies between each 6581 chip, even inside the same revision, are huge, to say the least.

However, R4ARs seem to be an exception here. No matter what their production date/batch is, they tend to sound quite consistent with each other (at least from my personal tests with 10+ different chips).

This is why I've chosen this particular revision while working on Timewarp Spheres [2sid]

Quoting deMOSic
The 6581s Filter Distortion may be sometimes a pain but use it good and OOOOOH your gonna get some good stuff!

The output sounds different depending on the current filter offset and current volume, which is quite unique feature. However, switching the filter mask on/off leads to awfully loud clicks, so it requires some additional planning to properly handle them. In the end, it's quite impossible to use the "usual" 8580 editing logic and expect simirarily successful results when conducting 6581.

Quoting Adam
how can it survive four decades and somehow only now in 2022 it's doomed? makes no sense to me at all.


Exactly. As long as the very last ninja still uses 6581, it can't be claimed dead.
2022-07-17 20:41
chatGPZ

Registered: Dec 2001
Posts: 11107
Quote:
R4ARs seem to be an exception here.

its just yet another myth. the R4AR chips are not special in any way.
2022-07-17 21:21
F7sus4

Registered: Apr 2013
Posts: 112
Quoting Groepaz
its just yet another myth. the R4AR chips are not special in any way.


I have considered that somehow all the owned R4AR used for tests might have provided similar filter sound by pure luck, but unless appropriate recording samples show up to prove otherwise, it's merely just a claim.
2022-07-17 21:42
chatGPZ

Registered: Dec 2001
Posts: 11107
I'm more interested in what the AR marking actually means ("advanced resonance" is... just another myth =P)
2022-07-17 23:39
hedning

Registered: Mar 2009
Posts: 4594
Spread Eagle Idaho. <3
 
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