One of the big reasons why many people
have been unable to get the same results with a player piano in
their home, that the salesman does in demonstrating the instrument,
lies in the fact that musical expression is ordinarily difficult
In the Apollo you will find the Dynaline
Device—a guide to musical expression which enables anyone after
a half-hour or so of practice to secure exactly the same results
in the way of expression as a finished artist.
On each music roll is a blue line. This
line represents the correct expression of the composition marked
there by the musician who made it. The Apollo is equipped with an
indicator. When one pedals rapidly this pointer advances to the
right—pedaling slowly, it recedes to the left.
Now all that one has to do to secure correct
expression with the Apollo is to pedal so that this indicator follows
This is simplicity itself.
Now—is it not a fact, that since the musician
who marked the roll indicated the correct expression by his blue
line, that when the player piano owner makes the Dynaline follow
this marking, he is playing with exactly the same expression as
the musician who made the roll?
In this simple way we have enabled our
owners to at all times pedal their instruments correctly, at the
same time not interfering with their putting their own individual
interpretations on the music when desired.
Above test from an Apollo Player Piano Catalogue,