Korg Forums Forum Index Korg Forums
A forum for Korg product users and musicians around the world.
Moderated Independently.
Owned by Irish Acts Recording Studio & hosted by KORG USA
 
 FAQFAQ   SearchSearch   MemberlistMemberlist   UsergroupsUsergroups   RegisterRegister 
 ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in 

Defective multisample Saw (Kross 2 and maybe others)

 
Post new topic   Reply to topic    Korg Forums Forum Index -> KORG Kross
View previous topic :: View next topic  
Author Message
Puukka



Joined: 11 May 2018
Posts: 25
Location: Krems an der Donau

PostPosted: Fri Jun 01, 2018 3:10 pm    Post subject: Defective multisample Saw (Kross 2 and maybe others) Reply with quote

I´m currently studying the Kross 2 and I realized a strang behavior of the sample wave Saw.

1.) Take an InitProg patch,
2.) At the P-OSC page select Saw (311)
3.) Filter Cutoff Frequency to as example 50-60

You´ll realise a big sound difference when changing from D5 to D#5

A workaround would be to use Saw-MG3 (I guess MG means Moog. But what means 3, anyone having a clue?

Thanks and kind regards,
Herbert
_________________
https://www.youtube.com/channel/UC7e5fedB7Kcl7IfAW1PpOmg
Nord Lead A1
Korg Kross 2
Back to top
View user's profile Send private message Visit poster's website
OpAmp
Platinum Member


Joined: 07 Jun 2013
Posts: 1173
Location: Brussels, BE

PostPosted: Fri Jun 01, 2018 7:42 pm    Post subject: Reply with quote

Hi,

I replicated the issue also on the Kross (1). The sample number is different (266) but, indeed there is a huge difference.
I looked at spectra of the D5 and D#5 notes and played around with the cut off frequency. There is indeed something wrong with the sample.

From D5#, it looks like
1. another sample is taken for which harmonics abonve +/- 10kHz are gone
2. the cut off frequency of the filter halves
Given that by default the filter is a 4 pole one, the shift of the cut off frequency substracts suddenly a lot more harmonics by going from D5 to D#5, resulting in a huge difference in sound (saw to sine like).

Looks like a bug in the sample and/or engine. Too bad...
_________________
microKORGXL, Kaossilator Pro, monotribe, SQ-1, volca fm, Kross 88 BK
Alesis SR18, Akai Miniak, Fender Strat, Line 6 Spider II 112, Zoom MS-50G
Back to top
View user's profile Send private message
Puukka



Joined: 11 May 2018
Posts: 25
Location: Krems an der Donau

PostPosted: Sat Jun 02, 2018 6:35 am    Post subject: Reply with quote

Thanks for replicating and your accurate analysis.
Yes, as would react the filter as you stated.
But because it seems to get normal again at F#6, it seems to be the streched sample at that range.

I´ll be able to live with it using Saw MG3 instead but I´ll try to communicate it to Korg support, that they might correct it for the next workstation.
I also guess, that Krome and maybe Kronos are using the same sample.

Kind regards from Austria,
Herbert
_________________
https://www.youtube.com/channel/UC7e5fedB7Kcl7IfAW1PpOmg
Nord Lead A1
Korg Kross 2
Back to top
View user's profile Send private message Visit poster's website
Puukka



Joined: 11 May 2018
Posts: 25
Location: Krems an der Donau

PostPosted: Tue Jul 10, 2018 9:01 am    Post subject: Reply with quote

Here´s an update.
German Korg support confirmed the issue and told me to report it.
By the way, Krome don´t have that issue even using the same sample "Saw".
So maybe it could be repaired by a firmware update?

Regards,
Herbert
_________________
https://www.youtube.com/channel/UC7e5fedB7Kcl7IfAW1PpOmg
Nord Lead A1
Korg Kross 2


Last edited by Puukka on Tue Jul 10, 2018 8:41 pm; edited 1 time in total
Back to top
View user's profile Send private message Visit poster's website
OpAmp
Platinum Member


Joined: 07 Jun 2013
Posts: 1173
Location: Brussels, BE

PostPosted: Tue Jul 10, 2018 8:38 pm    Post subject: Reply with quote

Hi,

That would be great!

But I doubt I will get an update for my Kross (1)...

Thanks for contacting Korg Support concerning the issue and reporting here back.

Bye
_________________
microKORGXL, Kaossilator Pro, monotribe, SQ-1, volca fm, Kross 88 BK
Alesis SR18, Akai Miniak, Fender Strat, Line 6 Spider II 112, Zoom MS-50G
Back to top
View user's profile Send private message
Display posts from previous:   
Post new topic   Reply to topic    Korg Forums Forum Index -> KORG Kross All times are GMT
Page 1 of 1

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum


Powered by phpBB © 2001, 2005 phpBB Group