Ties between whole notes
I'm using a well-known piano instruction book, "Adult Piano Adventures" by Nancy and Randall Faber.
Several tunes have two or more whole notes -- of the same tone -- in 4/4 time, connected by ties or a daisy-chain of ties.
Most (all?) books say that a tie between two identical notes means that you strike the tone once, but its duration is the sum of the time intervals, eg. two whole notes tied together in 4/4 would be 8 beats worth.
Trouble is, no note is going to sustain that long on a piano, at any reasonable tempo, even if I hold the key down.
So how am I to interpret these marks? Let the note fade away (usually by the first measure or two) or re-strike it, which seems to be at odds with what I've read about ties?
I see videos on Youtube of people playing these tunes and see them being played both ways.
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