Editing Prepared piano (section)

== Related techniques ==
=== Tack piano ===
{{Main|Tack piano}}

Strictly speaking, a tack piano is not a prepared piano, since
* No objects are inserted into or onto the strings;
* The strings' original pitches remain perceptible; and
* The preparation is not fully reversible.

Although the tacks can be removed from the hammers, inserting them causes permanent damage to the felt; for this and other reasons, the use of tacks is generally discouraged by piano technicians.<ref>{{Cite web|url=http://www.perfessorbill.com/help/help.htm|title=RagPiano.com - Site Help|website=www.perfessorbill.com}}</ref>

=== Acoustisizer ===
''The Acoustisizer'' is an electroacoustic musical instrument built from a small grand piano with built-in speakers, magnetic guitar pickups, [[Boundary microphone|PZM]]s, and ''prepared piano'' strings. It was built as part of a graduate thesis project at California State University Dominguez Hills by Bob Fenger (1983), a student of [[Richard Bunger Evans|Richard Bunger]] (author of the ''Well Prepared Piano''). Speakers are built into the bottom of the instrument, redirecting its own amplified sound back onto the sounding board, with strings and magnetic pickups creating an amplitude intensity loop, which in turn drives and vibrates suspended ''kinetic oscillators'' (assemblages of vibration sensitive materials). Secondary control parameters allow extraction of vibration and sound phenomena from the ''kinetic oscillators'' through a series of proximity microphones and ''PZMs'' (piezo-electric contact mics). An article by the inventor was published in ''Experimental Musical Instruments Magazine'' April 1991, Nicasio, California.<ref>Fenger, Bob Icon. [http://windworld.com/products-page/back-issues/ "The Acoustisizer"], Nicasio, California, volume 6, no. 6, April 1991.</ref> It includes pictures of the ''kinetic oscillators'' and stages of the construction process, including an underbody view of the speaker system configuration.<ref>Fenger, Bob, "The Acoustisizer" {{cite web |url=http://preparedpianos.com/ |title=Piano Bob-UJAM MAN ! |access-date=2013-08-19 |url-status=dead |archive-url=https://web.archive.org/web/20131202231654/http://preparedpianos.com/ |archive-date=2013-12-02 }} Joshua Tree, California, April 1991</ref>