Hace ya algunos años que no trasteo con el sounset editor pero en la página oficial dan esta información:
Alguien escribió:
Installing a sound set
- Download the sound set you want, and extract the archive. (En tu caso el archivo generado por el programa)
- One or more XML files (e.g. Sibelius Essentials.xml) will be extracted.
- Copy the XML file or files into your sound set installation directory (the location of which is described below).
Localizaciones de las carpetas en Sibelius 7 y superior:
Windows XP: C:\Documents and Settings\<your username>\Application Data\Avid\Sibelius 7\Sounds
Windows Vista/7: C:\Users\<your username>\AppData\Roaming\Avid\Sibelius 7\Sounds
Mac OS X: /Users/<your username>/Library/Application Support/Avid/Sibelius 7/Sounds
Note: If the Sounds folder does not exist at first, simply create it and place your sound set inside.
To use this sound set inside Sibelius, use the Play > Setup dialog. See chapter 6.2 Playback devices in File > Help > Sibelius Reference for more details.
Localizaciones en Sibelius 6 y anteriores
Windows XP: C:\Documents and Settings\<your username>\Application Data\Sibelius Software\Sibelius x\Sounds
Windows Vista/7: C:\Users\<your username>\AppData\Roaming\Sibelius Software\Sibelius x\Sounds
Mac OS X: /Users/<your username>/Library/Application Support/Sibelius Software/Sibelius x/Sounds
Note: If the Sounds folder does not exist at first, simply create it and place your sound set inside.
To use this sound set inside Sibelius, use the Play > Playback Devices dialog. See the chapter on Playback devices in Help > Sibelius x Reference for more details.
Para más información sobre Sibelius SoundSets:
Programa y plantillas
http://www.sibelius.com/download/sse/main.html
Instalación
http://avid.force.com/pkb/articles/en_US/how_to/How-to-install-a-Sibelius-sound-set
The Sound Set Project (página en la que obtener o encargar soundsets para Sibelius)
http://www.soundsetproject.com