#21

my sequencer doesn’t try to emulate the 303’s slide. i use the x0x heart, which has a slide input, so it just sends that a gate. it does emulate the 303’s timing and logic re how to send the slide signal.

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#22

I had the Copper Trace’s SEEK for a while, it’s great to use, and gorgeously built. It feels quite familiar to operate to the 303 itself, some added features like the evolve function which was subtle but nice to add some generative progression to the bassline. I had a euro XoXHeart too, it was DIY, not sure if it was the way I calibrated it, or built it but it never had a perfect 303 flavour.

Catalyst Time’s Arrow is what I originally wanted for my 303 acid skiff, but I could never get my hands on one.

SEEK_shoot_03-2c2_800
SEEK_shoot_03-2c2_800800×466 233 KB

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#23

I’ve never used a 303, but I’ve been looking at the Cyclone Analogic TT-303. It’s an analogue clone at about the same price as the boutique TB-03, and it’s got an input to go through the filter which the Roland does not – could be fun!

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#24

Wow, that’s very cool! Hope you have time to put it online someday. I’d love to play with it.

Great work!

1 Like
#25

I looked into this sequencer for bassline use, but I think it lacks per-note “slide”, doesn’t it?

#26

I use a tb-03 to sequence eurorack. I love it. It’s strange hearing acid style sequencing with something very not acid, like mutable rings for instance. I’ll try and find a clip to post.

6 Likes
#27

Now I regret selling rings

#28

does anybody have any experience with x0x heart mods? it’d be particularly great to expand ranges for some of the parameters. there is some documentation on the rabid elephant site: https://rabidelephant.com/blogs/general/x0x-heart-modifications but no sound examples, so hard to say how much difference these mods make. [also a personal request - not being a DIY person these are not something i would attempt - if anybody would be interested in being hired to build a modded x0x heart please let me know!]

#29

(made a small discovery about the oscillators given the link with oscilloscope pics @scanner_darkly posted awhile back - the sawtooth, being analog, looks curved as bandlimited sawtooths in the digital world do, so when you take two of them, offset in phase, and subtract them from each other, you get the square:

Screen Shot 2020-11-05 at 5.30.44 PM
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Roland probably did it by one single oscillator by introducing a delay to create second saw with phase-offset…
i guess i knew you could get a square subtracting saws before, but since the waves looked so different from what i’m used to seeing in the digital world, didn’t quite piece it together for the look of the analog ones.
so now i just need to study up on softening those curves/sharp-turns in the waveform better(then further scaling if needed to normalize within a more desirable range, followed by the filtering… baby steps :baby:)…
even though the waveforms looks different, i might look into this more to start with:
https://www.semanticscholar.org/paper/Synthesis-of-Quasi-Bandlimited-Analog-Waveforms-3%2F-Schoffhauzer/ee7aede98685275144487265045ad08ce90c2ed5
:point_up:my mind gets curious about so many tangents, but sometimes answers get found there, too… we’ll see :sweat_smile:)

8 Likes
#30

can’t seem to find anything about how the 303 square wave is generated specifically other than it’s “derived from the sawtooth waveform using a simple, single-transistor waveshaping circuit”. there is some interesting discussion here: https://www.kvraudio.com/forum/viewtopic.php?t=455469

i assume it would be easier to generate a square using a comparator, but then it won’t have that characteristic shape i guess? with your approach, the amount of delay has to be based on frequency, right?

on x0x heart you can mix square and saw, and when you do, pitch goes up an octave which might also provide a clue about the phase relationship between the saw and the square.

3 Likes
#31

Mi Super 6 doing some slow acid the other day

“http://hermetechmastering.com/Super6Acid.mp3”

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#32

exactly(i should’ve called it a ‘variable-delay’ which would be varied according to the freq of the saw osc)… but reading that thread, waveshaping sounds much more likely, i’ll have to explore that first(personally, i don’t like the control-response of a variable-delay in a digital realm so i’d prefer to pursue that other possibility, anyways).
:+1:

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#33

I have a tt-303, and today I discovered that while in pattern write mode you can shift the sequence by holding function and pressing back or next. While in syncopation with a drum track, especially one with side-chaining, even single note offsets can completely change the groove.

5 Likes
#34

I’ve been lurking in this thread as a big fan of the acid sound. I’ve owned a few analog clones, but I want to take a second to mention digital acid sounds. I find there’s something really intriguing about acid sounds from digital synths, they often sit in the uncanny valley of sounding like a 303 but not quite and sometimes that can be quite interesting. Also, they often bring new parameters to the table.

Personally, I love the acid sounds I can make with the monomachine. Although not the same bubbly sounds you get from the 303, it has its own charm.

I also really like the acid sounds from the nord that Logos is getting in the following video. I haven’t had a chance to replicate it yet but I’m eager to play with some nord acid.

Anyone have any favourite digital synths for acid lines?

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#35

so this happened unexpectedly:


that’s not my finalized attempt at creating a TB-303 patch in Max, but while researching waveshaping, decided to look into Chebyshev polynomials, then while looking into them found intriguing ways to do sample-by-sample generated Chebyshev waveshaping(as opposed to wavetable-lookup-based), and one thing led to another and it ended up having a sort of ‘acid’ sound, so i created a patch and thread there in case anyone else wants to play/modify:

(i shared some of the articles from here, over there, in case folks there end up researching/tinkering, then maybe over all these threads, we’ll have a nice knowledge-based built for techniques to get this sound in the software world)

still learning, but it was a lucky attempt/find, so i figured i’d share the results so far :beers:

5 Likes
#36

camping out with the intention of keeping up and keeping in the loop here :grimacing:

i’ve had some great results with a dixie, resonant eq, and wasp filter for some really raw basslines. sequencing and quantizing i have a steppy, ornament and crime and pip slope. definitly want to finesse the setup - if anyone has a similar arrangement i’d love some patch suggestions :slight_smile:

#37

yes! especially so because - i’m fond of meticulous recreations of the 303 sound, both hardware and software - but i’m also super curious about deconstructing it and taking it further, while keeping that character. like something unabashedly digital but still having that spirit (as @TomFoolery put it, “the uncanny valley of sounding like a 303 but not quite”). thank you for posting your progress, looking forward to seeing where it takes you (especially since i’ve just started dipping my toes in max world).

same for recreating it with other synths/modular. i do think it’s more than just finding the right osc/filter combo, a lot of it is in dynamics, envelopes affecting the filter, accent also having effect on both the vca and the filter. @laihalll - for further experiments i would add another envelope and then try and replicate what robin whittle describes here: https://www.firstpr.com.au/rwi/dfish/303-unique.html

3 Likes
#38

This is fun whilst you’re supposed to be working

3 Likes
#39

The you are getting are great. Would love to have a look at the code if you’re willing to share - I have an x0xheart, norns and crow so would be great to give this a try by and see where it leads.

No need to tidy anything or provide support - I’d be happy just digging into whatever is there for a few ideas.

1 Like