The Musical Iconography Databse

Middle section contains angels playing psalteries(?), lute, portative organ, rebec/fiddle, and gittern.

Left panel contains a possible shawm, and trumpet, however the images that are available are not clear. 

Right panel gives a tambourine, two drums and a double pipe.

 

Info

This site gives the most high-definition image that is findable (note the ability to zoom in on different areas):

http://fineartamerica.com/featured/vanni-lippo-the-annunciation-1360-everett.html

Image originally found at: http://thelutesprogress.blogspot.co.uk/2014/07/designing-medieval-lute.html

Further information taken from: https://www.flickr.com/photos/24364447@N05/6559172521/