Nord User Forum

[geokeys]

Hi,
This is my first post. just bought a new Electro 5.
Playing the pianos with an 88 MIDIed keybed.

I notice that all the Uprights are slightly detuned in the lower octaves.
For example, if you play the lowest two Cs together the detune is obvious.
Have Nord done this on purpose to make it seem authentic ?
Personally I don't like it.
The Grands do not have this issue.

Has this comment come up before ?

[Eumel]

They sampled real pianos with existing idiosyncrasies, so yes they "did it on purpose" - they are all different and there are many to choose from in the Nord library, some have less de-tuning than others. Probably a matter of taste, If I'm going for an obvious upright sound I don't mind the tuning issues. I personally prefer it over some of the antiseptic-sounding stage pianos out there. YMMV.

DH

[baekgaard]

How did you check the tuning of the pianos?

Most real pianos needs a little stretching to make them sound reasonable (partly due to the overtones not being fully "in line" with the fundamentals). Every piano tuner has their own taste on how this should be done, and it may be that you like some tunings more than others -- assuming this is not a grossly over-exagerated tuning issue.

But the bottom line is that the fundamentals may not be in tune even if (some of) the overtones are, and vice versa.

[Mr_-G-]

The CP80 sample is also quite stretched on the low keys.

[analogika]

The CP80 sample is also quite stretched on the low keys.

Necessarily. CP70/80 sound like crap with equal temperament.

[NordPH]

Yes, the cp80 is stretched like an oktave or something in The bass.
Had to do the same when i sampled one too.
Last octave was useless.

[anotherscott]

Yes, the cp80 is stretched like an oktave or something in The bass.

One wouldn't "stretch tune" anything close to an octave, or even a semi-tone. It's much more subtle than that.

[analogika]

Yes, the cp80 is stretched like an oktave or something in The bass.
Had to do the same when i sampled one too.
Last octave was useless.

Er, no, that’s not what we’re talking about. The CP70/80 sound strange in the lower octaves because of their short strings producing inharmonic overtones - that’s how the instrument sounds, and not sampling that, but transposing the higher samples downward is faking an instrument that simply doesn’t exist in reality. CP goes “twang” - that’s its character.

However, this inharmonicity can be compensated somewhat by clever tuning. You lower the bass notes by a couple of cents (and usually raise the high notes by a couple).

https://en.m.wikipedia.org/wiki/Stretched_tuning

This is the tuning chart for a Fender Rhodes:

[baekgaard]

Looks like the OP lost interest in this topic? Anyway, I guess it was related to the stretching then.

[baekgaard]

https://www.youtube.com/watch?v=1Hqm0dYKUx4

Fun videosnip, thanks But equal temperament is not why you need stretching; that is something that happens "on top" of the equal temperament we're all used to hear. Read about it at https://en.wikipedia.org/wiki/Stretched_tuning (which also explains why uprights, with shorter strings, have more problems in this area then large grand pianos.