Random atonal note issue

[Kinokoma]

Anyone else who experienced this issue reported on gearslutz?

„What was worse was that seemingly once per 'session' I'd encounter an issue where wildly atonal notes - typically an octave or more away from the notes I was playing - would randomly start sounding, and would sometimes require a restart to fix.“

I had the same issue with my 8 voice. I’ve had my Prologue for a week now and have played it every day for an hour or so, but the problem has only appeared on the first two days.

[RikMaxSpeed]

I've noticed two related issues:

- Tuning of the analogue oscillators isn't always great, both at the low & high end of the keyboard. I've tried rebooting the Prologue so it retunes its oscillators once the keyboard has been running for 10mn (assuming it takes a little while to heat up) but that had no discernible effect.

- Presets that use the ring modulator can generate some far off frequencies, so playing a high note can generate a low bass rumble for example - this is to be expected, that's what a ring modulator does. But this also had me thinking that the keyboard was generating random notes or aliasing badly.

[Synthee]

I had a few atonal notes that came suddenly in the beginning, but after re-updated the firmware of other reasons, they haven't appear again, not on the sounds I have been playing anyway.

When this guy did his live stream with his new prologue, the sudden atonal tone happened at one time, and he reacted to that, but I dont remember at what time it was and its to long for me to try and find it.


<iframe width="560" height="315" src="https://www.youtube.com/embed/chYXCYg4aSk" frameborder="0" allow="autoplay; encrypted-media"></iframe>

[RikMaxSpeed]

Yes, I've bumped into this now too, 2 issues:
1. osc1 on some voices playing out of tune.
2. completely random oscillator pitch on some voices. I wish there was a line of LEDs, 1 per voice, like on the DSI synths, it would help pinpoint the issue.

In both cases rebooting the Prologue and that fixed the problem.
I've now updated to OS 1.1, hopefully what will help.

Problem 1 sounds like a problem with the tuning.
Problem 2 sounds like a bug when changing presets or in dual mode where some voices don't appear to pick up the correct settings.

[mookid]

Hey guys , think I got the same issue on my prologue 8, random oscillator pitch bug happened to me before the 1.10 update and after the update, it goes away when I change mode (last time was in chord mode, move back to poly mode, issue disappear) pretty strange, hope it's not hardware related ? any info from korg ?

[steve79]

Anyone else who experienced this issue reported on gearslutz?

„What was worse was that seemingly once per 'session' I'd encounter an issue where wildly atonal notes - typically an octave or more away from the notes I was playing - would randomly start sounding, and would sometimes require a restart to fix.“

I had the same issue with my 8 voice. I’ve had my Prologue for a week now and have played it every day for an hour or so, but the problem has only appeared on the first two days.

Just to say that I solved this problem! Made the voice update....the procedure is written on the firmware uodate guide!!! Try it out!!