Harmonic distortion after OS 1.2.1 upgrade

[MartinHines]

It may even be because of some changes to global settings, but I don't know. It's really quite difficult to write down all the settings for Global Mode for OS 1.1.0 and then for OS 1.2.1 and then reset those setting.

Global Settings are part of .pcg file. Look at the v1.2 Parameter Guide pg. 718, under "Save PCG". If you performed this operation and UNCHECKED all boxes EXCEPT the "Global Setting" box, the resulting .pcg file would only contain global settings.

You could then reload this file after the v1.2 update. This is the same mechanism you would use if you want to save global settings for pedal polarity, etc.

This way, you shouldn't have to write down anything.

[elvisjohndowson]

You're the one who brought this info up. (Korg probably only knows it from you.) I'm only asking you to write down one setting - Global - Velocity Curve (upper left). Okay, just remember the number "4" and see if that changes.

Hi Mike,
You mis-understood my response. I mean if the global setting have been altered after loading the LAC-1 PCG file, then I should not automatically assume that the velocity curve was the only setting that was altered. Since I have not way at present to do an object comparision of the global settings data between two pcg files, I will be forced to write most of the relevant global settings parameters and then update from OS 1.1.0 to 1.1.1 and then to 1.2.1, checking at each step, which of the global parameters from 1.1.0/1.1.1 default factory.pcg have been altered.

No dis-respect intended, ok?!!

Elvis Dowson

[Mike Conway]

On a positive note, it's great to see Jerry, Dan and Stephen on hand for some quick assurances. Like Stephen said, Korg should probably check two units, side by side.

[Mike Conway]

No dis-respect intended, ok?!!

None taken. If there is a sound difference, then I'm glad that you were the one to find it. We all want our Os sounding the best they can.

[StephenKay]

Guys, I wouldnt be spending so much time stating this over and over again, unless I can hear an actual difference between OS 1.1.0 and OS 1.2.1.

OK, but - you don't have two machines side by side.

I'm working on a sequence right now, and I swear sometimes when I come in to start a new day of work, that it sounds different from the day before, even though it can't, so I don't know. The mind can sometimes play tricks. The only true way of getting to the bottom of this is empirical comparisons.

You're the one claiming that there's a difference, so the way I see it, if you want something more than people saying "I don't hear it", you've got to somehow prove that there *is* a difference - it's not really up to Korg to prove that there *isn't*, if you know what I mean.

And if it's so obvious (to you), I can't see how a WAV file recorded at 48k 16 bit would not show it.

[MartinHines]

[Since I have not way at present to do an object comparision of the global settings data between two pcg files, I will be forced to write most of the relevant global settings parameters and then update from OS 1.1.0 to 1.1.1 and then to 1.2.1, checking at each step, which of the global parameters from 1.1.0/1.1.1 default factory.pcg have been altered.

Elvis Dowson

Elvis,

Read my post above. You should be able to re-load your Global settings via a saved .pcg file, meaning you wouldn't have to compare anything.

In theory this is no different than saving Program Bank A .pcg data as an example.

[elvisjohndowson]

Global Settings are part of .pcg file. Look at the v1.2 Parameter Guide pg. 718, under "Save PCG". If you performed this operation and UNCHECKED all boxes EXCEPT the "Global Setting" box, the resulting .pcg file would only contain global settings.

You could then reload this file after the v1.2 update. This is the same mechanism you would use if you want to save global settings for pedal polarity, etc.

Thanks a lot Martin, you're a life saver. This will certainly help try to isolate if it is some global setting parameter that is causing all this.

So the proposed sequence is:
a. OS 1.1.0 full internal hard disk format & re-authorization. [Done]
b. Create a MIDI sequence for all the test candidate combis and programs.
c. Save only the global settings into a O110.PCG file
d. Resample the MIDI sequence performance to the internal hard disk, but I'm not so sure about the results since the playback resolution and frequency maybe higher at the analog output stages than the one used for internal resampling and recording to hard disk
e. Upgrade to OS 1.1.1 and playback MIDI sequence and check for any differences.
f. Upgrade to OS 1.2.1 and playback the MIDI sequence and check for any differences. Resample the sequencer playback if differences are detected. Check if perceptible differences exist between the WAV file recordings for the two versions
f. Load the LAC-1 PCG file and playback the MIDI sequence and check for differences. Again resample if differences exists and check for differences between the two WAV files.
g. If differences exist between the two OS versions during playback, then save OS 1.2.1 global setting to hard disk, load the OS 1.1.0 global settings and see if the problem goes away. If it does then it can be narrowed down to modified global settings in OS 1.2.1. If it cannot be isolated or narrowed down to the global settings, then it must be some other problem, which only Korg can comment on.

Does this test sequence sound acceptable to everyone? If so, then I'll go back home in about 10 hours and try this out and post the results in about 14 hours.

Elvis Dowson

[elvisjohndowson]

And if it's so obvious (to you), I can't see how a WAV file recorded at 48k 16 bit would not show it.

I know Stephen, I'm just calling it as I hear it. Not every problem or situation will have a direct and straight forward explaination.

Remember the gain loss issue with samples being played back in Sample/Program mode and within a drum kit? Atleast that was readily apparent.

This situation isn't. If I had cybernetic ears, then I could have done a spectral analysis to confirm !!

Elvis Dowson

[elvisjohndowson]

You're the one claiming that there's a difference, so the way I see it, if you want something more than people saying "I don't hear it", you've got to somehow prove that there *is* a difference - it's not really up to Korg to prove that there *isn't*, if you know what I mean.

Innocent until proven guity, is it? Well, all I can see is me spending more of my time doing this. It's not like I'm going to get a medal or something for doing it

All I know is that I spent quite a lot of money on the OASYS and I really freaked out yesterday. This in addition to all the other problems that I observed in the past three months such as improperly fastened loose screws inside the OASYS and it falling off internally during transport due to low freq vibration, CD player play back problems, faint burning smell from the OASYS and now this.

Mind you, problems such as gain loss in the drum sample compared to sample/program mode, I can forgive, since that can be fixed and may have been an oversight, but this difference in sound quality after installing the OS 1.2.1 upgrade, I cannot. It still remains to be see if there really is a problem/difference, however, but these are my initial reactions.

Elvis Dowson

[StephenKay]

So the proposed sequence is:

That sounds about right to me, that's what I'd do, although I'm not sure what the difference between e and a is, since you're already in 1.1...

[elvisjohndowson]

That sounds about right to me, that's what I'd do, although I'm not sure what the difference between e and a is, since you're already in 1.1...

Sorry about that, e. should have read upgrade to OS 1.1.1.

I will run this test on all three versions 1.1.0, 1.1.1 and 1.2.1.

Elvis Dowson

[thekeymaster]

Thanks a lot Martin, you're a life saver. This will certainly help try to isolate if it is some global setting parameter that is causing all this.

So the proposed sequence is:
a. OS 1.1.0 full internal hard disk format & re-authorization. [Done]
b. Create a MIDI sequence for all the test candidate combis and programs.
c. Save only the global settings into a O110.PCG file
d. Resample the MIDI sequence performance to the internal hard disk, but I'm not so sure about the results since the playback resolution and frequency maybe higher at the analog output stages than the one used for internal resampling and recording to hard disk
e. Upgrade to OS 1.1.1 and playback MIDI sequence and check for any differences.
f. Upgrade to OS 1.2.1 and playback the MIDI sequence and check for any differences. Resample the sequencer playback if differences are detected. Check if perceptible differences exist between the WAV file recordings for the two versions
f. Load the LAC-1 PCG file and playback the MIDI sequence and check for differences. Again resample if differences exists and check for differences between the two WAV files.
g. If differences exist between the two OS versions during playback, then save OS 1.2.1 global setting to hard disk, load the OS 1.1.0 global settings and see if the problem goes away. If it does then it can be narrowed down to modified global settings in OS 1.2.1. If it cannot be isolated or narrowed down to the global settings, then it must be some other problem, which only Korg can comment on.

Does this test sequence sound acceptable to everyone? If so, then I'll go back home in about 10 hours and try this out and post the results in about 14 hours.

Elvis Dowson

Elvis

Sounds acceptable but what a load of hassle.I wish you all the best at this but I would'nt personally put myself through all that.Reloading 3 OS's ,reformatting of hard drives etc etc.

The sound difference would have to be immense for me to do all that.I'm sorry I cant hear it mate....even though ive had 1.2.1 on my machine for quite a while.

[RC-IA]

concerning sound overall quality since 1.2 upgrade, i'm not so sure right now, but again, maybe sounds that use filtering or any other parameter evolution during playback (using karma ou step seq or LFO controlling..etc) may sound different in 1.2 because of the smoothing algo.

see my post :

http://www.korgforums.com/forum/phpBB2/ ... hp?t=19254

thanx

[Derm]

Maybe suggested already and possibly too late, but why not try a reinstall of 1.21 first? Could save a lot of hassle.

[sebbytriton]

concerning sound overall quality since 1.2 upgrade, i'm not so sure right now, but again, maybe sounds that use filtering or any other parameter evolution during playback (using karma ou step seq or LFO controlling..etc) may sound different in 1.2 because of the smoothing algo.

see my post :

http://www.korgforums.com/forum/phpBB2/ ... hp?t=19254

thanx

One question, does someone try to listen the factory demos with 1.1.1 and 1.2.1 ?
I think it's a good reference that everyone have onto his OASYS.
A WAVE record with 1.1.1 and 1.2.1 can make a possible choise of comparison.