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Strange behavior on waveform importing... (ModX - V2.51)

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 Fou
Posts: 0
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Topic starter
 

Hi
I try to create a new "sound" (Performance with only one part and only one element) using a one note audio sample.
The root note of this audio sample is C3
The strange behavior I confront is that when I import the audio sample to ModX, all notes above C5 sound the same = as C5 !!!!
Notes below up to the end of the keyboard sound as expected. But anything above C5 doesn't follow the correct pitch template.

I try different ways to solve the problem.
I create the "sound" to Melas Waveform Editor, importing the audio sample and making the appropriate adjustments.
It sounds as expected. The imported audio sample layered across the keyboard.
I save the "sound". I save it as User file (X8U) also export it as Library (X8L)
After loading the data to ModX, the same strange behavior! Anything above C5 sounds as C5!

I also try to import the audio sample on edit environment as "new waveform" .
I was able to import the audio sample but again anything above C5 sounds as C5 and doesn't follow the pitch template!

I try different audio samples (from my personal sample library but also 3rd party audio samples) but the problem remain.
The only I noticed is that if I try to use an audio sample with another root key note (e.g C2) then the note point where the strange behavior begin change respectively (for example, if root is C2 anything above C4 sound as C4 !!!)

Is this a limitation of the ModX?
Did some one else confront the same problem during importing single audio samples?

I'm messing around with audio samples and sound editing for almost 20 years.
Until today this is the first time I confront something like this.
Normally using only one audio sample, the sound just layering across the full keyboard. It doesn't sound fine, but this is how ti works.

I'm really worried that something is wrong with my keyboard....

 
Posted : 13/12/2020 5:21 pm
Jason
Posts: 8212
Illustrious Member
 

Sounds about right. You see clues in the data list. Coarse tune has a maximum of +24 semi-tones. Note shift max is +24. Pitch bend is max +24. The engine seems to support a 2 octave shift from nominal. And furthermore, if you try to shift notes that are between key samples - you'll notice a range of notes that sometimes hit a "ceiling" (stay the same note - as you see) before hitting the next sampled key.

The fix is to either supply more samples that are "true" samples of higher/lower notes or to take the note you have and sample the MODX's output of the stretched note creating a somewhat "artificial" new sample.

There's nothing wrong with the keyboard. If you push even factory sounds hard enough - you'll find the same kind of related behavior.

Current Yamaha Synthesizers: Montage Classic 7, Motif XF6, S90XS, MO6, EX5R

 
Posted : 13/12/2020 7:16 pm
 Fou
Posts: 0
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Topic starter
 

Maybe... but the expatiation you give cover only the shift upwards... You mention +24.
So what about downwards? Why the sample can stretch downwards without limits?
I don't think that the explanation you provide is right.

 
Posted : 13/12/2020 8:57 pm
Jason
Posts: 8212
Illustrious Member
 

My description is functionally accurate and true to what the machine does. This is my and your machine. Both the same. It's in the DNA.

I notice more of a downward range - like you do. But the main complaint is in the upwards direction.

If you look at pitch bend range you see -48 and +24.

A clue that the downwards direction is designed to go further and consistent with the observations.

No matter what you believe is true or not - your keyboard is working as designed. The strategies to help this have been communicated. You could place the sample higher up the keyboard if the stretch downwards covers your working range (as yet another strategy).

Current Yamaha Synthesizers: Montage Classic 7, Motif XF6, S90XS, MO6, EX5R

 
Posted : 13/12/2020 11:24 pm
 Fou
Posts: 0
New Member
Topic starter
 

If so (-48,+24 stretch range) is a huge disappointment from pro-hardware.
Even cheap toys handle this better....
The provided "solutions" aren't solutions actually:
• "supply more samples" And if you don't have more samples? If you have only one audio sample?
• "place the sample higher up the keyboard" C3 must be C3, not something else because of this ridiculous limitation of a high priced professional hardware...

It's a huge disappointment...

 
Posted : 14/12/2020 9:51 am
 rudy
Posts: 0
New Member
 

You can use the free program Audacity to create new samples that are shifted in pitch.

 
Posted : 14/12/2020 4:41 pm
Jason
Posts: 8212
Illustrious Member
 

Here's more discussion on the same subject:

https://www.yamahasynth.com/ask-a-question/limited-note-limits-in-montage
... and another
https://www.yamahamusicians.com/forum/viewtopic.php?t=16356

I'm not saying it's good or bad to have a boat with a hole in it. But if you wish to take that boat out on the water for any extended period of time, you need to plug the hole with something to get the experience you want (a day of fishing without sinking). You may wish the boat didn't come with a hole (or it would self-heal or something else magical). And it is true it takes some amount of effort to plug. But it isn't insurmountable to put in the effort and you do end up with a boat that does what you want.

One strategy was given to arrive at another sample: sample your own MODX (with a computer or other external gear) playing a pitch 2 octaves higher. Place this as root on C4. Keep going.

Or you could use software to pitch shift the sample using a computer and use that second sample as the C4 root sample. I'm not sure if JM Tools can already do this or not. I know some amount of sample editing is available in JM Tools - not sure if you can export modified samples that have been pitch shifted. I know other (free) tools can do this.

Current Yamaha Synthesizers: Montage Classic 7, Motif XF6, S90XS, MO6, EX5R

 
Posted : 14/12/2020 5:04 pm
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