Single cycle waveform rips from old digital gear

VST, AU, AAX, etc. plug-in Virtual Instruments discussion
KVRist
59 posts since 23 Feb, 2015

Post Tue May 11, 2021 3:33 pm

More specifically I found a collection of Jd-800 single cycle wave forms on a site that created a jd-800 vsti emulation but can't seem to access it right now

Anyone in the know as to where it gone too

Since reading about wavetable synthesis I would like to design sounds with wavetable creators stolen from old pcm or digital synths/keys/modules or memory card patch rips

If you can link me or whatever that would be awesome, thanks

KVRist

Topic Starter

59 posts since 23 Feb, 2015

Post Tue May 11, 2021 3:41 pm

http://www.modularsynth.co.uk/patchpages/jaded800.shtml

Found the jd-800 emulation thing

Still definitely interested in more lofi single cycle waveforms if you know of them

KVRAF
5730 posts since 15 Sep, 2005 from East Coast of the USA

Post Wed May 12, 2021 7:51 am

matthewisgrand wrote:
Tue May 11, 2021 3:33 pm
More specifically I found a collection of Jd-800 single cycle wave forms on a site that created a jd-800 vsti emulation but can't seem to access it right now

Anyone in the know as to where it gone too

Since reading about wavetable synthesis I would like to design sounds with wavetable creators stolen from old pcm or digital synths/keys/modules or memory card patch rips

If you can link me or whatever that would be awesome, thanks
I am not sure where the Adventure Kid waveforms are actually from, but you can check them out:
https://www.adventurekid.se/akrt/wavefo ... waveforms/
Last edited by Examigan on Wed May 12, 2021 8:38 am, edited 2 times in total.

KVRist

Topic Starter

59 posts since 23 Feb, 2015

Post Wed May 12, 2021 8:02 am

Cool thanks

KVRAF
1692 posts since 2 Jul, 2010

Post Wed May 12, 2021 8:24 am

I've been trying to make some single-cycle waveforms and wavetables with my modular synth and really struggling to find an appropriate tool for trimming cycles exactly. The time-honoured approach seems to be pitching a note to a somewhat friendly frequency and then cutting with an editor, but this is still going to introduce a bit of distortion as the ends will not line up perfectly.

I'm been playing with some Python code to interpolate the waveform and resample an exact zero-to-zero cycle. But there is probably still a discontinuity in the gradient :scared:

KVRist
76 posts since 14 Sep, 2020

Post Wed May 12, 2021 9:12 am

imrae wrote:
Wed May 12, 2021 8:24 am
I've been trying to make some single-cycle waveforms and wavetables with my modular synth and really struggling to find an appropriate tool for trimming cycles exactly. The time-honoured approach seems to be pitching a note to a somewhat friendly frequency and then cutting with an editor, but this is still going to introduce a bit of distortion as the ends will not line up perfectly.
had good results with audacity when cutting waves. arranging them to wavetables is tricky though.
Last edited by garryO on Thu May 13, 2021 8:02 am, edited 1 time in total.

KVRist
191 posts since 12 Sep, 2007

Post Wed May 12, 2021 9:32 am

Zero cross point editing will get you there.
Anything other than that will leave artifacts.

User avatar
KVRian
1315 posts since 22 Sep, 2016

Post Wed May 12, 2021 9:44 am

You can do the maths... if we assume a single cycle in a wt synth takes 2048 samples, then let's compute 44100 samples per second / 2048 samples per cycle ~ 21.5 cycles per second ... if you look up which musical note has the frequency of 21.5 then closest is F0 with 21.83... tweak it by a few cents and then sample it... voila!
if I remember correctly AdventureKit additionally to the samples gas a writeup how he created the samples...

In Vital Synth you could live a little more comfortabel because in Vital you can set the size of your single cycle as you wish. Like if you have a sample at c4 the set the cycle size ... or even better let vital set it for you.
viral afaik even lets you then export these folliwing the 2048 definition.

Another method is using resampling facilities of synths like tone2 icarus. You start with an arbitrary sample of a single pitch and let the resample import it for you.
Last edited by ] Peter:H [ on Wed May 12, 2021 10:10 am, edited 2 times in total.

KVRAF
5730 posts since 15 Sep, 2005 from East Coast of the USA

Post Wed May 12, 2021 9:58 am

I’d like to make a wavetable from the Sub Phatty I have here but never got around to it.

KVRist
76 posts since 14 Sep, 2020

Post Wed May 12, 2021 10:59 am

yes with vital you can make stuff like this quickly...

wanted to upload an example wt but kvr says its to big...

KVRAF
1692 posts since 2 Jul, 2010

Post Wed May 12, 2021 11:11 am

I haven't tried it in Vital yet, but I found when importing synth sweeps into Europa (which also has sample->wavetable import) that it didn't work reliably. While filter sweeps of simple waveforms seem to work ok, synced waveforms or sub-containing waveforms are detected incorrectly and the resulting table contains different parts of the fundamental cycle in different slots. I think a bit of user-intervention is needed to solve those cases.

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