I've recently been researching the harp and have learned things such as the pedaling system, register colors, and idiomatic playing. I've also been exposed to a technique called "pres de la table" which basically means to pluck the strings close to the soundboard. The effect is a darker, edgier sound. I was hoping if a knowledgeable composer or harpist could answer my questions: Is pres de la table an extended technique that should be used sparingly, or is it a color choice that is up to the composer? Also, are there any other "extended techniques" on the harp that I should know about?