Both harmonic and inharmonic overtones and a changing mix over time. Would be a big database. https://www.pianobuyer.com/Articles/Detail/ArticleId/40/Digital-P

Both harmonic and inharmonic overtones and a changing mix over time. Would be a big database. https://www.pianobuyer.com/Articles/Detail/ArticleId/40/Digital-Piano-Basics-Part-1 https://www.pianobuyer.com/Articles/Detail/ArticleId/40/Digi... Above reference discusses some of the issues for digital pianos - which are well-established and it is easy to find demonstration models in music shops.