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#1789294 - 11/15/11 05:20 AM MP6 stange overtones
Talaf Offline
Full Member

Registered: 08/14/11
Posts: 68
Hi!

While trying to play around with TADutchman presets on the MP6, I came across something strange. I had people coming over so I didn't have the time to go through it further but I'll test it out again.

http://fex.insa-lyon.fr/get?k=n0AtzdIo5HjeHuZePJh

This is the Mellow Grand, and from my limited test this happens clearly with String Resonance pushed to 9-10. From what I gathered the other resonance/key off parameters didn't matter, and I didn't test the other sounds. It seems to happen on chords, mainly major thirds/minor sixth more easily, but it probably does it on others, I just couldn't test-drive it more...

Does this replicates on other MP6 boards or is it some fault in mine?


Edited by Talaf (11/15/11 05:21 AM)

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#1789359 - 11/15/11 09:21 AM Re: MP6 stange overtones [Re: Talaf]
dewster Offline
4000 Post Club Member

Registered: 12/07/09
Posts: 4675
Loc: Northern NJ
Interesting. It sounds to me like the string resonance algorithm thinks one or more keys are down when they aren't.
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#1789442 - 11/15/11 12:29 PM Re: MP6 stange overtones [Re: Talaf]
EssBrace Offline
2000 Post Club Member

Registered: 12/01/09
Posts: 2821
Loc: Suffolk, United Kingdom
I agree with Dewster - it is very like that sound.
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#1789502 - 11/15/11 02:08 PM Re: MP6 stange overtones [Re: Talaf]
voxpops Offline
3000 Post Club Member

Registered: 03/20/07
Posts: 3204
Loc: Wales
What the OP fails to say is whether other notes were depressed during the test. It may be simply the exaggeration of the normal sympathetic resonance effect, which on the MP6 also includes the resonance of adjacent notes (a semitone above or below the played note - there's a technical term for this, which escapes me). I'm assuming that the resonant note was depressed sufficiently for it to ring in this way. I cannot get my MP6 to trigger its resonance unless a harmonically related note is depressed.

HOWEVER, I have noticed that very occasionally the resonance fails to trigger on the first attempt - which is definitely a small software bug.
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#1789579 - 11/15/11 04:46 PM Re: MP6 stange overtones [Re: Talaf]
Talaf Offline
Full Member

Registered: 08/14/11
Posts: 68
No other notes were depressed, although I can't reproduce the bug today... ho well, it's probably better that way. I did try to silently depress a note and the exaggerated resonance did sound the same as what happened yesterday, so it may be some sort of ghosting? A note I played at some point which stayed depressed?

Sorry for the annoyance, let's hope it won't happen again smile

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#1789612 - 11/15/11 05:32 PM Re: MP6 stange overtones [Re: Talaf]
dewster Offline
4000 Post Club Member

Registered: 12/07/09
Posts: 4675
Loc: Northern NJ
To pass the DPBSD silent replay test, a DP requires more complex tracking of active notes. Not sure if the latest MP6 firmware supports silent replay, but if it does perhaps the active note tracking algorithm is getting confused?

Another thought: perhaps this is an emulation of sympathetic resonance of the undamped highest notes on a real piano?
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THE RD-700NX Thread!
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