Electro 6D not in tune

[pterm]

In fact in smaller sized samples the original stretching (of the piano that was sampled) is still present on the notes/keys actually sampled (mapped), so the test would show if the Piano engine of Nord is well designed and preserves the stretching (i.e. reproduce it correctly) also when using that sample for adjacent notes/keys or not.

Understood. This is what I meant to suggest: that there might be two phenomena (one analog "stretching" and the other digital "mapping"). Thanks for clarifying this.