Immersed Music: All music is immersed in some medium, such as a solid
(e.g. buried instruments), liquid (underwater instruments), or gas (e.g.
the standard concert hall).
<p>
More generally, consider:
<ul>
 <li>(A) the sound-producing medium of the instrument in
     the Hornbostel Sachs, Schaeffner, or Physical Organology sense;
 <li>(B) the surrounding medium in which the instrument plays; and
 <li>(C) the medium in which the listener is immersed: usually liquid or gas,
     but you can also press your ear to the ground to "immerse" yourself
     in solid matter.
</ul>
Examples:
<ul>
 <li>A flute in a concert hall produces sound with gas and the
     medium surrounding both the instrument and the listener is gas.
 <li>A piano in a concert hall produces sound with solid matter
     (strings and percussion)
     and the medium surrounding both the instrument and the listener is gas.
 <li>A piano submerged in a swimming pool
     (e.g. "Pool Piano", S. Mann, 2006) still produces sound with solid
     matter, but the medium surrounding the instrument is liquid.
     The listeners may choose to immerse themselves in liquid (water)
     or gas (air).
</ul>
Aerophone air sound;
Aeraud air hear
Audaero hear air

Sound    Surround    Hear

<p>
Previously known instruments produce sound by matter in its solid
or gas state, whereas some newly invented instruments produce sound
by matter in its liquid or plasma states.
<p>
One such newly invented instrument, the hydraulophone, produces sound
by matter in its liquid state.  Hydraulophones can be experienced

<p>
<strong>Physical Organology</strong> classifies instruments based on
the sound-producing medium,
regardless of the medium that surrounds the instrument or listener:
<p>
<img src=fivestates.png width=600>
<p>
Earth/Solid; Water/Liquid; Gas/Wind; Plasma/"Fire"; Quintessence/Idea
<p>
<h1>Put instruments under each corresponding part of diagram, like branches
    in a tree:</h1>
<ol>
 <li>piano
  <ul>
   <li>strings (violin)
   <li>percussion (glockenspiel)
  </ul>
 <li>hydraulophone
 <li>serpent
  <ul>
   <li>woodwinds (tin flute)
   <li>brass (french horn)
  </ul>
 <li>plasmaphone
 <li>???
  <ul>
   <li>theremin
   <li>synthesizer
   <li>direct brain machine interface
  </ul>
</ol>
<p>
<img src=http://upload.wikimedia.org/wikipedia/commons/1/18/Piano.jpg width=100>
<img src=http://wearcam.org/oscfuntain/southnessie_hands_imgp2559prc.jpg width=100>
<img src=http://upload.wikimedia.org/wikipedia/commons/3/35/Serpent-bonanni.jpg width=100>
<img src=http://upload.wikimedia.org/wikipedia/en/0/07/Electric_plasmaphone_instrument.jpg width=100>
<p>
Strings, Percussion;   ...  Woodwind, Brass; ...  
<br>
<img src=Violin_VL100crop.jpg width=50>
<img src=http://upload.wikimedia.org/wikipedia/commons/6/6e/Glockenspiel-malletech.jpg width=50>
<img src=Boneflute_rot90.jpg width=50>
<img src=http://upload.wikimedia.org/wikipedia/commons/6/63/French_horn_front.png width=50>
<img src=http://upload.wikimedia.org/wikipedia/commons/3/36/Leon_Theremin_Playing_Theremin.jpg width=33>
<img src=http://upload.wikimedia.org/wikipedia/commons/2/22/Minimoog.JPG width=33>
<img src=http://upload.wikimedia.org/wikipedia/en/9/98/Musical_brainwave_performance_at_deconism_gallery.jpg width=33>


<pre>
Quintessence/Idea
main() {
        printf("hello, world");
 }
<pre>

mechanical:<br>
<img src=http://upload.wikimedia.org/wikipedia/commons/9/9c/Romanian_pickup2.jpg width=50>
<p>
optical:<br>
<img src=http://upload.wikimedia.org/wikipedia/en/3/34/Optiganglen.jpg width=50>
<p>
electrical:<br>
theremin

<p>
aaaaaaaaaa circular sawblades, work in all 5 states of matter;
<p>

hybrids: tod machover hyperinstrument;
<p>
s. mann hyperacoustic instrument.

<p>