If JSyn is installed properly, you should only have three files in your sketch folder: the sketch (.pde) file, libJSynV142 under “code” and the sound file under “data”.
/home/reed/sketchbook/Sonia_Tests/code
/home/reed/Desktop/processing-0124/libraries/candy/library
/home/reed/Desktop/processing-0124/libraries/candy/library/candy.jar
/home/reed/Desktop/processing-0124/libraries/dxf/library
/home/reed/Desktop/processing-0124/libraries/dxf/library/dxf.jar
/home/reed/Desktop/processing-0124/libraries/javascript/library
/home/reed/Desktop/processing-0124/libraries/javascript/library/javascript.jar
/home/reed/Desktop/processing-0124/libraries/net/library
/home/reed/Desktop/processing-0124/libraries/net/library/net.jar
/home/reed/Desktop/processing-0124/libraries/opengl/library
/home/reed/Desktop/processing-0124/libraries/opengl/library/jogl.jar
/home/reed/Desktop/processing-0124/libraries/opengl/library/opengl.jar
/home/reed/Desktop/processing-0124/libraries/opengl/library/jogl-natives-macosx-ppc.jar
/home/reed/Desktop/processing-0124/libraries/opengl/library/jogl-natives-windows-i586.jar
/home/reed/Desktop/processing-0124/libraries/opengl/library/jogl-natives-linux-i586.jar
/home/reed/Desktop/processing-0124/libraries/opengl/library/jogl-natives-macosx-universal.jar
/home/reed/Desktop/processing-0124/libraries/pdf/library
/home/reed/Desktop/processing-0124/libraries/pdf/library/pdf.jar
/home/reed/Desktop/processing-0124/libraries/pdf/library/itext.jar
/home/reed/Desktop/processing-0124/libraries/serial/library
/home/reed/Desktop/processing-0124/libraries/serial/library/RXTXcomm.jar
/home/reed/Desktop/processing-0124/libraries/serial/library/serial.jar
/home/reed/Desktop/processing-0124/libraries/sonia_v2_9/library
/home/reed/Desktop/processing-0124/libraries/sonia_v2_9/library/JSynClasses.jar
/home/reed/Desktop/processing-0124/libraries/sonia_v2_9/library/sonia_v2_9.jar
/home/reed/Desktop/processing-0124/libraries/xml/library
/home/reed/Desktop/processing-0124/libraries/xml/library/xml.jar
/home/reed/Desktop/processing-0124/libraries/candy/library
/home/reed/Desktop/processing-0124/libraries/candy/library/candy.jar
/home/reed/Desktop/processing-0124/libraries/dxf/library
/home/reed/Desktop/processing-0124/libraries/dxf/library/dxf.jar
/home/reed/Desktop/processing-0124/libraries/javascript/library
/home/reed/Desktop/processing-0124/libraries/javascript/library/javascript.jar
/home/reed/Desktop/processing-0124/libraries/net/library
/home/reed/Desktop/processing-0124/libraries/net/library/net.jar
/home/reed/Desktop/processing-0124/libraries/opengl/library
/home/reed/Desktop/processing-0124/libraries/opengl/library/jogl.jar
/home/reed/Desktop/processing-0124/libraries/opengl/library/opengl.jar
/home/reed/Desktop/processing-0124/libraries/opengl/library/jogl-natives-macosx-ppc.jar
/home/reed/Desktop/processing-0124/libraries/opengl/library/jogl-natives-windows-i586.jar
/home/reed/Desktop/processing-0124/libraries/opengl/library/jogl-natives-linux-i586.jar
/home/reed/Desktop/processing-0124/libraries/opengl/library/jogl-natives-macosx-universal.jar
/home/reed/Desktop/processing-0124/libraries/pdf/library
/home/reed/Desktop/processing-0124/libraries/pdf/library/pdf.jar
/home/reed/Desktop/processing-0124/libraries/pdf/library/itext.jar
/home/reed/Desktop/processing-0124/libraries/serial/library
/home/reed/Desktop/processing-0124/libraries/serial/library/RXTXcomm.jar
/home/reed/Desktop/processing-0124/libraries/serial/library/serial.jar
/home/reed/Desktop/processing-0124/libraries/sonia_v2_9/library
/home/reed/Desktop/processing-0124/libraries/sonia_v2_9/library/JSynClasses.jar
/home/reed/Desktop/processing-0124/libraries/sonia_v2_9/library/sonia_v2_9.jar
/home/reed/Desktop/processing-0124/libraries/xml/library
/home/reed/Desktop/processing-0124/libraries/xml/library/xml.ja