Continued writting EM essay

2016-04-18 15:20:08 +01:00
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@@ -99,27 +99,49 @@
    \footnotetext{Diagram taken from:
    \url{http://www.mediacollege.com/audio/howto/feedback.html}}

-    This is a common problem in the context of live audio, as the
-    exponential nature of the feedback causes a distinct "howling" sound
-    that builds rapidly and is commonly considered unplesant. As a result,
-    a great deal of research has been carried out into methods for
-    attenuating and controlling this effect.~\parencite[p.1]{}
-    However, the volatile and unpredictable nature of acoustic feedback has
-    been used to great effect in both popular and avant-garde music.
-    Pioneering guitarists such as Jimi Hendrix have used the loop created
-    through placing an electric guitar pickup close to it's amplifier to
-    compliment virtuosic guitar solos in pieces such as Foxy Lady~\citeyearpar{}
-    This is taken one step further in works such as Steve Reich's Pendulum
-    Music, where feedback becomes the focus of the piece entirely. This is
-    discussed further in section~\ref{wolfman}
+    This is a common problem in the context of live audio, as the exponential
+    nature of the feedback causes a distinct "howling" sound that builds
+    rapidly and is commonly considered unplesant. As a result, a great deal of
+    research has been carried out into methods for attenuating and controlling
+    this effect.~\parencite[p.1]{} However, the volatile and unpredictable
+    nature of acoustic feedback has been used to great effect in both popular
+    and avant-garde music.  Pioneering guitarists such as Jimi Hendrix have
+    used the loop created through placing an electric guitar pickup close to
+    it's amplifier to compliment virtuosic guitar solos in pieces such as Foxy
+    Lady~\citeyearpar{} This is taken one step further in avante-garde works
+    such as Steve Reich's Pendulum Music, where feedback becomes the focus of
+    the piece entirely. This is discussed further in section~\ref{pendulum}
    
    \subsection{Electronic Feedback}
+    Electronic feedback takes the principal of recursively feeding an output
+    back into an input into the analog electronics domain. In this situation,
+    the recursive processing is performed purely on electrical signals,
+    replacing the initial acoustic input from the microphone found in acoustic
+    feedback, with a purely electronic input as part of an electronic circuit.
+    The result of this process is then produced in the listening space via
+    amplification~\parencite[p.187]{holmes2012eaem}. Composers such as David
+    Tudor and Gordon Mumma explore these techniques through their creation and
+    use of custom electronic circuits designed to exploit the characteristics
+    of this effect.~\parencite[p.186, 390]{holmes2012eaem} A detailed analysis
+    of these techniques are presented in section~\ref{ElecFeed}\\
+
+    Although it is outside the scope of this essay, it is worth noting that
+    delay feedback forms the basis for electronic IIR filtering, both in the
+    analog and digital domain, and by extension is an integral part of almost
+    any composition that utilises audio
+    filters/equalizers.~\parencite[p.71-72]{zolzer2011dafx} This is an example
+    of how the precice control of electronic feedback can lead to a plethora of
+    creative musical possibilities.
+
+    \subsection{Amplification}
+    It has been stated that feedback (particularly audio feedback) is difficult
+    to control. This is due to it's recursive nature. 
+
    \subsection{Mathmatical Feedback}
    Rational Melody XXI - Tom Johnson
    Not electronic feedback, but serves as an example that feedback is not
    limited to electronics.
    IIR filter example?
-    \subsection{Amplification}

    \section{Musical Aspects and Implications of Feedback Systems}
    \subsection{Indeterminacy}
@@ -130,11 +152,11 @@

    \section{Composition Analysis}
    \subsection{Acoustic Feedback}
-    \subsubsection{Steve Reich's Pendulum Music}
+    \subsubsection{Steve Reich's Pendulum Music}\label{pendulum}
    \subsubsection{Robert Ashley's The Wolfman}\label{wolfman}
    - ref: kyle gann - robert ashley

-    \subsection{Electronic Feedback}
+    \subsection{Electronic Feedback}\label{ElecFeed}
        David Tutor's Untitled (1996), Toneburst (2004), and Pulsers (1996)
        Gordon Mumma's Hornpipe

@@ -142,6 +164,8 @@
        John Cage's Cartridge Music
        Stockhausen's Mikrophonie

+    \section{Conclusion}
+
    \printbibliography

 \end{document}