This is a photo of Adolf Adel, a "Waldhornist" with the band of the Hälsingland Regiment of the Swedish Army. The name and information were written in ink on the back of this small photo and it is dated 1896. I think Adolf is no more than 15 years old and perhaps as young as 13. His instrument is a piston valve horn similar to the French style horns used at this time. Note that he has sword at his side.
The photographer is S. Petterson from Söderhamn, which is in the east central province of Hälsingland, Sweden.
Searching the web brought up a site devoted to Swedish military uniforms and there I found a similar period photograph of a regular soldier with the same crest on the shako. The regiment's motto is "Solidity, Ability, Confidence", a good slogan for a musician.