"With the organs of Bach's time, the blower (human-driven) had limited power, nowhere near enough to sound all the pipes at once. So if you had a steady long note in one part and staccato chords in the others, the long note would have an audible drop in power as each chord sounded, producing subtle articulations that weren't explicitly notated. "


I exploited this on the pipe organs I used to play - even modern electric blower fed ones can exhibit this effect.

But this is a very useful technique when exploited on a Piano Accordion!!!

It's part of the side effect of the 'bellows flutter' technique.

Also you can use the staccato on one side and legato on the other to 'bring forward' one side or the other as desired.


As I've said before the Piano Accordion is more closely related in playing technique to a Pipe Organ than a Piano!