Well I can hear a repetitive rattling sound on the low bass notes, but it is rattling very fast and evenly. So I call that tinny. A pure treble note like from

Well I can hear a repetitive rattling sound on the low bass notes, but it is rattling very fast and evenly. So I call that tinny. A pure treble note like from a computer wave form does not rattle like that, to my ears. A normal piano is supposed to have impure frequencies, it's part of the timbre and what gives it warmth. Like a chocolate or winey kind of muddy. Artistically I much prefer that.