So I've seen quite a few places - and I assume well known trumpet people naming the the C in the staff as middle C. Unless I am misreading the page, Bbtrumpet.com does this, "Middle C or 3rd space C is the exception." see Trumpet Lessons That's what I thought it was in my high school days. However, when I took up piano, unless my mind is playing tricks on me - middle C was - below the treble cleff staff. Of course it's the middle of the grand staff, so maybe that's the rub. In the end it's just words, but it's very basic, and when we talk about music, we should all have the same basic reference. This started with comments about G above high C and double G. Again a referential problem. From Wikipedia Middle C Middle C (on the grand staff) is named so because it appears exactly in the middle between the bass and treble clefs. Middle C is not exactly in the middle of any keyboard instrument, including the piano. Middle C is usually the splitting point between the two staves on the grand staff, and can be shared between the staves. Grand staff - Wikipedia, the free encyclopedia This is consistent with my understanding. However also wiki: Although C4 is commonly known by the expression "middle C", the expression is somewhat keyboard-specific: players of some instruments may refer to the note by another name, and may use "middle C" to refer to a different note. For example, that note (C4) would be "low C" to the player of a Western concert flute (as it is in the lowest register of that instrument â€” see playing range), while C5 would be middle C. Nevertheless, the expression "middle C" is generally clear across instruments and clefs. C (musical note) - Wikipedia, the free encyclopedia So some see C5 as middle C? Now the question, is there a resource that "names" these notes properly? This came up initially because of the "double g" vs "g above high C" terminology, which I learned wrong (or maybe never really learned).