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MS-20EX Overview Series

 
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CharlesFerraro
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PostPosted: Fri Aug 11, 2017 11:35 pm    Post subject: MS-20EX Overview Series Reply with quote

Complete series below.


CharlesFerraro wrote:
There is something I messed up on (maybe two things but the other one doesn't really matter). The ring mod setup in MS-20 behaves super strange in that the pulse width control on oscillator 1 seems to fade up the signal of oscillator 2. At first I thought it was simply an AM configuration but it's not! I was only able to mimic the same sound on AL-1 by assigning a macro to the pulse width of osc 1 and mix level of osc 2 so that when the osc 1 pw was pushed to the point of zero output osc 2 would have it's gain all the way up in the mixer. Very strange!

Turns out that behavior is explained by the Ring Mod in the MS-20 actually being an XOR configuration. A modern synth that I can think of with this same configuration is Steinberg's Retrologue 2.

---------------------------


Interesting to note that the output waveform of the square LFO has a DC offset because it is unipolar. Haven't listened to see if the triangle/saw is bipolar but I suspect it is. (Turns out the graphic in the patch panel shows the tri/saw MG output is in fact bipolar). It would be neat if the saw up/down transformations are actually offset too while the tri remained centered. I don't think this is the case but I can check.
If anyone would like me to find the LFO rates of the 20 lmk. It would be interesting to find out if I can get a faster rate with it tempo sync'd at 300bpm vs AMS boosted.
Since I can't use an AMS mixer source for LFO rate (or in the very least the option is greyed out in the editor), as of right now, I don't think it's possible to keytrack the LFO rate to tune it like I did with the LFO's in AL-1. There might be a trick or two to examine in the patch panel but I haven't gone over that section yet.





----------------------------


It's simply impossible to go super in-depth while keeping the video around ten minutes long. There are tons of subjects that I could go into detail on like CVs, linear vs exponential FM, signal flow... But I'd rather these tutorials be bite-sized snippets that include at least some information or techniques that aren't in the manual. All that being said, something that IS in the manual but still worth mentioning: when EG1 is manually patched into pitch via the panel it acts as a conventional envelope. That is to say, the start of the attack is the same pitch as note-on while the sustain pitch is pushed further and further from that start point with more EXT intensity.

----------------------------


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Last edited by CharlesFerraro on Tue Sep 05, 2017 7:18 pm; edited 6 times in total
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chris
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PostPosted: Sat Aug 12, 2017 5:57 am    Post subject: Reply with quote

Thanks Charles for this series of tutorials.
Very intuitive and instructive.
Helps to tackle some dark areas of the MS20EX.
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CharlesFerraro
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PostPosted: Sat Aug 12, 2017 7:26 am    Post subject: Reply with quote

You're welcome chris, thanks for the positive feedback. If you have any question feel free to ask. Also if you have some MS-20 tips of your own definitely post them up!
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CharlesFerraro
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PostPosted: Mon Aug 21, 2017 2:37 am    Post subject: Reply with quote

Edited a new video into the original post. MG, EG, and Modulation part three. I focus on the strange and unintuitive behavior of EG2 on the MS-20.
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DAZZA3483



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PostPosted: Mon Aug 21, 2017 8:08 am    Post subject: Reply with quote

Appreciate your time and effort to make these..very helpful.
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CharlesFerraro
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PostPosted: Mon Aug 21, 2017 11:30 am    Post subject: Reply with quote

Happy you're getting some use from them, DAZZA3483! Started this series because there are things about the MS-20 that I don't fully understand myself. Looking forward to diving into the details of the patch panel next week.
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Niven8
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PostPosted: Tue Aug 22, 2017 8:50 am    Post subject: Reply with quote

Many thanks Charles hugely helpful...
niven.
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CharlesFerraro
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PostPosted: Sat Aug 26, 2017 1:07 pm    Post subject: Reply with quote

Thank you, Niven. I appreciate it.
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CharlesFerraro
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PostPosted: Sat Aug 26, 2017 1:09 pm    Post subject: Reply with quote

New video in the original post: The Patch Panel. Included some footnotes.
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CharlesFerraro
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PostPosted: Tue Sep 05, 2017 6:54 pm    Post subject: Reply with quote

check original post for the final video uploading here in just a second. The ESP.
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dtscape
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PostPosted: Wed Sep 06, 2017 6:58 pm    Post subject: Reply with quote

This is brilliant...
Thank you.

I don't suppose anyone has done a similar thing on the AL-1 engine? Wink
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CharlesFerraro
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PostPosted: Wed Sep 06, 2017 9:17 pm    Post subject: Reply with quote

dtscape wrote:
This is brilliant...
Thank you.

I don't suppose anyone has done a similar thing on the AL-1 engine? Wink


Not to my knowledge. But just for you I'll do a demystification of the ring mod section in AL-1 for the next vid.

Cheers
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