Museo Organologico, a museum that holds a private collection of around 600 ethnic instruments that Fernando Ramires Escare has.The Fundación Valparaíso is also on the route towards the city.

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Note added at 9 mins (2009-08-03 16:01:29 GMT)
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or: musical instrument museum

The Museo organológico de Valparaíso, an unique musical instrument museum located on 488 Ferrari street (Cerro Bellavista) a few blocks down from La ...
festivalpo.blogspot.com/2008/03/museo-organologico.html - Cached - Similar

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Note added at 11 mins (2009-08-03 16:03:01 GMT)
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I know the English in this ref. is horrendous but I would keep the original Spanish and add the explanation of what it is ...

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Note added at 12 mins (2009-08-03 16:04:08 GMT)
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and my English needs a bit of work too as I see from my first suggestion :)

should read "ethnic instrument museum"

This is the clearest explanation. While "organological" is correct English, it is obscure to everyone but musicologists, and very academic. I've been a working classical musician for 30 years, university trained, and no one I know uses organological. "Ethnic" should be avoided too, as it unnecessarily suggests a hierarchy of European vs. non-European. Other museums of musical instruments are called:

National Music Museum, University of South Dakota
Musée de la musique, Paris