hi!
i just got a tb303 to repair for a person and after solved its problems i started to investigate how the 303 differs from my xoxbox with sokkos.
and i noticed some small differencies that might not matter that much but anyhow...
the 303 has a shared line for slide and clock impulses for the da concerter, accent ic and slide circuitry. the xox was made with two lines. one for clock/latch and one for slide. the accent ic was removed from the xoxbox aswell.
the clock impulse in the 303 is a very breif burst (havnt measured duration yet) on every gate or 16th step if not a slide is present - then the signal is hold for the whole slide period - in the 303 this short pulse is also connected to the slide circuitry. although it is very brief it could affect the cv in the begining of every step. in the sokkos the clock is a 50% on 50% off pulse.
the slide signal doesnt turn on in the right step in sokkos compared to the 303. the slide should come on in the step after that of where the slide is written... or maybe the very last part of the step which contains the slide. (again, havnt measured in detail..)
sequencer differencies with sokkos
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- antto
- Posts: 1636
- Joined: Thu Apr 15, 2010 3:21 pm
Re: sequencer differencies with sokkos
sokkos2 turns the slide ON in the "mid-step" (but that probably originates from the stock FW)
i've written an article which explains the 303 sequencer's pattern playing logic, with pseudo-code.. you might want to check out the first parts about the Sequencer->Synth, and the following illustration with the actual control signals (gate/accent/slide) against a pattern
i haven't actually probed those signals in a 303, but i'm pretty sure that's what you'll see if you probe it
the only places where i'm not fully sure are those marked with yellow asterisk (the slide signal being set high on a tied note) but i can almost bet i'm right, and even if i'm not - that won't really make an audible difference, since it's about tied notes after all
i've written an article which explains the 303 sequencer's pattern playing logic, with pseudo-code.. you might want to check out the first parts about the Sequencer->Synth, and the following illustration with the actual control signals (gate/accent/slide) against a pattern
i haven't actually probed those signals in a 303, but i'm pretty sure that's what you'll see if you probe it
the only places where i'm not fully sure are those marked with yellow asterisk (the slide signal being set high on a tied note) but i can almost bet i'm right, and even if i'm not - that won't really make an audible difference, since it's about tied notes after all
- aminoacid
- Posts: 352
- Joined: Tue Jun 20, 2006 5:27 am
Re: sequencer differencies with sokkos
cool!
ill make some more detaild measuring/recordings of the logics and get back.
wish i knew how to code..!
ill make some more detaild measuring/recordings of the logics and get back.
wish i knew how to code..!
- rv0
- Posts: 395
- Joined: Tue Jul 14, 2009 4:50 pm
Re: sequencer differencies with sokkos
watch out with learning that 303, you may end up hating your x0xb0x and having to upgrade it with a x0xlarge and n0nx0x2 (which 100% clones the 303 sequencer, and does more and better!)
Please be positive and constructive with your questions and comments.