Low frequency poping noise

EdisonRex · Posted: Wed Jun 24, 2009 4:26 pm Post subject:

to the forums Urosh. That is a very interesting and thoughtful post. I will try out your tests. I might even post the results here Wink

If someone else doesn't do it first.

torsig1967 · Posted: Sun Jun 28, 2009 1:35 pm Post subject:

recnsci · Joined: Jun 24, 2009 Posts: 4 Location: Belgrade

torsig1967 · Posted: Tue Jun 30, 2009 2:52 pm Post subject:

recnsci · Joined: Jun 24, 2009 Posts: 4 Location: Belgrade

Munchausen · Joined: Jun 18, 2009 Posts: 3 Location: PA

Urosh,

Please send your message to DSI support. You seem quite knowledgable about it and maybe they could tell you if an update would actually be possible.

gd · Joined: Jul 02, 2009 Posts: 16 Location: Canada

I agree with the above assessment as the P 08 suffers from the same so it must be due to the nature of the DCO's vs. the VCO.

Jinsai · Joined: Nov 19, 2005 Posts: 2 Location: San Francisco, CA

Well, here's an MP3 where it's fairly clear: http://www.chillproductions.com/anu/temp/DCOglitch.mp3

Here's what a non-glitched attack looks like:
Posted Image, might have been reduced in size. Click Image to view fullscreen.

Here's what a glitched attack looks like:
Posted Image, might have been reduced in size. Click Image to view fullscreen.

Barely · Joined: Jul 07, 2011 Posts: 3 Location: somewhere else

Antimon · Posted: Thu Jul 07, 2011 3:23 am Post subject:

If you mean the faint sequence that opens the sound, that sounds like common clicks due to a steep attack to me. The noise you get on an Evolver is due to the pitch gliding, and is only apparent when you play two successive notes that have a large difference in pitch.

Another synth where this does appear though, is the Arturia Origin bafflingly enough. I've reported it here:

http://www.arturia.com/evolution/smf/forums.html?topic=3794.0

I can't for the life of me understand how someone could recreate this problem on a VA...

/Stefan

Barely · Joined: Jul 07, 2011 Posts: 3 Location: somewhere else

Antimon · Posted: Thu Jul 07, 2011 4:17 am Post subject:

The Origin is ok, I guess. I just think that the whole VA deal isn't for me - too often I struggle to make it sound anything else than bland. I was hoping that the Origin would be the polysynth with classic-like structure that fills a space between the PEK and the Nord Modular G2 Engine.

The hardware interface on the Origine is nice. I see it as a template machine - you use (and occasinally make) ready-made structures that are tweakable if you feel the need. Being accustomed to the Nord Modular I don't see the Origin as something you patch from scratch a lot - too cumbersome.

BobTheDog · Posted: Thu Jul 07, 2011 4:41 am Post subject:

I quite like patching the Origin.

I think it is because it is fairly simple, there are not that many modules to complicate things. Whereas the G2 makes my mind boggle and steam start appearing form my ears!

I find it easy to make the Origin sound good (to my ears) while I find it very hard to make the G2 sound good, although I know that people here with a bit more savvy than me make exceedingly good sounding G2 patches, if only I could understand them!

Pym · Joined: Apr 13, 2010 Posts: 2 Location: San Francisco

On page 7 of the 3396 preliminary data sheet (link: http://www.synthtech.com/cem/c3396pdf.pdf) you'll read about range of the oscillator and describing how the chip has a practical range of about 6 octaves with a reasonable error rate. To increase this range it's advisable to use a second resistor to switch over when the range goes from the low to high registers. That's probably what you're hearing. In most instruments using these chips and similar ones the total response time of the voice (envelopes, filters, etc) is pretty slow and thus masks small artifacts like this one. In our gear we err on the side of responsiveness, the envelopes and filter response are extremely quick, with the downside that you hear some artifacts that are naturally inherent in the analog circuitry. It's always a matter of compromise with things like this.

Barely · Joined: Jul 07, 2011 Posts: 3 Location: somewhere else

recnsci · Joined: Jun 24, 2009 Posts: 4 Location: Belgrade

littletinymonkey · Joined: Dec 11, 2018 Posts: 1 Location: USA

I am new to the Evolver and spent way to much time trying to track down what I was doing wrong before learning that this issue was more widespread than just my "new to me" unit.

I guess for future internet travelers, here's how I was able to recreate this problem reliably using a different method than what is discussed and by playing the same note over and over.

1. I created an init preset from page 8 of Anu Kirk's 'Definitive Guide To Evolver'.

2. I ensured that my Key Off/Xpose was set to Zero.

3. I copied the init preset that I just created to a neighboring slot so that I could easily toggle between the two identical presets.

4. Turn the program knob to change to one (or the other) of the init presets.

5. Press a key on my MIDI controller and listen for the DCO and VCO not firing at the same time. Press the same key again (without changing programs) and everything sounds as expected.

6. Repeat 4 and 5 until sad because by now you've noticed the issue.

7. Sigh and be sad.