Applies to the last two Db notes in the picture in question. (G clef). The music was originally copied into this project from another Dorico project which was an imported XML file. If I change the instrument to Cornet, the notes play. But when I change it back to trumpet the notes stop playing. What could be the cause of this issue? In the alto sax part I also have I can move the notes several octaves up and down into the red, but the notes still play back, so the issue seems to be tied to the trumpet somehow. As I can see in the instrument definition, advanced range is all the way up to F6, so the Db should be playable.
This is most likely connected to the sound engine that Dorico is being told to use. The default one can get a little bit funky sometimes with upper and lower range notes (contrabass clarinet suffers from the same issue in the lower register, last time I looked). Sometimes, itâs a case of those samples not being triggered properly - in others, itâs a case of the samples simply not being there at all. To be honest, I donât know which issue applies in your instance. Someone with more default sound engine experience will have to help you.
This is one of the issues that made me switch to NotePerformer, and early on in my Dorico life, too. I have yet to run into this kind of problem with NP. There might be a case where there is a missing sample somewhere in its vast sound map, but if there is, I have yet to encounter it.
My 2 cents.
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yep! I continued my search into the program and found that the sample for the trumpet stopped at the C just below the Db, hence why it didnât play. Managed to change the sample, so it plays now!
Yup, I might consider NP someday, but for now regular sounds ar okay.
Thanks for the help! 
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I assume you realise red notes are Dorico indicating notes out of conventional range, and many VSTâs for lots of instruments donât have samples outside ânormalâ range. This is controversial as most players nowadays can get higher notes than expected in the past, but VSTâs donât always cater for this, which is understandable, but limiting. For example, ask what the highest note on the violin is. There is no agreement on that at all!
Yup, that was the issue. I managed to switch sample which had a couple more semitones up in range, and everything worked perfectly!
Yeah, highest note is always relative to the player, to a certain degree at least.
I wonder if thereâs a trumpet library out there somewhere thatâs sampled notes high enough to render Tom Johnsonâs Celestial Music for Imaginary TrumpetsâŚ
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NotePerfomer of course has an unlimited range because itâs largely a modelled and not sampled library so @leejackson , I think youâd struggle to find any note NP cannot play. VSL libraries tend to have a decent range if you want proper sampling. Unlike with many other vendors, I canât remember ever having found a note I wanted to write which it wouldnât play.
Just to clarify, the note coloring is based on the instrument definition in Dorico, so it may not match the playable range on whatever VST youâre using.
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Here is the keyboard glockenspiel part of Le jardin fĂŠerique from Ma mère lâOye by Maurice Ravel, played by the General MIDI glockenspiel and the NotePerformer glockenspiel. Even though the NotePerformer glockenspiel is playing all of the notes, some of the pitches arenât close to being correct.
General MIDI glockenspiel
NotePerformer glockenspiel
Havenât heard that piece in particular, but I sure do love me a Piccolo Trumpet for soaring high trumpet parts! I use the one by SM Brass and itâs awesome.
Iâm guessing no oneâs ever heard itâŚ
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Nice catch (and demo), @johnkprice.
Yeah, NP is either âgoosingâ a few of those notes or needs to!
I hear the fundamentals correctly, but the (non-harmonic) overtones of the bells overpower them on the low notes.
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No one except dogs and cats perhaps! 
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Hi Judd, Do you know what those pitches are in kHz, roughly? If not I might try to work it out.
Iâve never thought to calculate. Have at it!!
Thatâs certainly higher than the âĂberpianoâ examples in the P.D.Q. Bach biography (which was one of the first things I attempted to copy when I got Finale in 1988). I think itâs even beyond the compass of a Photoshopped piano in a magazine ad for Sony from around the same time (which spans about 20 octaves):
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