The smaller medieval tromba marina is a very strange instrument that was used in place of the harder to learn keyless trumpet for centuries, eventually evolving into a 7 foot plus instrument of which there are tales of the great sensitivity of its sound. You would not know this from my lack of skill with it.
The instrument is played above the note you wish to play, making use of the instrument's harmonics. These are amplified by the trembling bridge that as it vibrates with the string beats a trumpetish sound on the sound board.
I'll make another video of this one later when I can get something resembling a tune out of it.
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