Simple abstraction, that adds or removes those 3 guard-points of an array, required for 4-point interpolation of tabread4, tabread4~, tabosc~ ect

1 at the beginning and 2 at the end.

Could be done cheaper, but is cleanly layed out ...
array-guard.pd
array-guard-help.pd

late edit / some additional notes:
. Syntax is: 51234512
. Audio example uses a very short array, the bigger it gets the less audible artifacts become
. [tabread4~] helpfile (pd 0.55.0) is wrong about right inlet had to be a signal, control input works too.