This is correct. A Bb clarinet is a "transposing instrument", it sounds a note lower than what is played, and that is what composers, publishers, and clarinettists expect. If you add, say, a violin, you will see the three flats. Parts for Bb instruments have two flats fewer than non-transposing instruments. If a clarinettist plays a C scale, others will hear a Bb scale. Please find out about "transposing instruments." See https://musescore.org/en/handbook/3/transposition#transposing-instrumen… for a start.
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Are you using transposing instruments such as a Bb clarinet? Do you have a score showing this alleged failure>
In reply to Are you using transposing… by [DELETED] 1831606
Yes, it is a separate part for Bb clarinet. To get F major as a home key, I had to choose Eb major.
This is correct. A Bb clarinet is a "transposing instrument", it sounds a note lower than what is played, and that is what composers, publishers, and clarinettists expect. If you add, say, a violin, you will see the three flats. Parts for Bb instruments have two flats fewer than non-transposing instruments. If a clarinettist plays a C scale, others will hear a Bb scale. Please find out about "transposing instruments." See https://musescore.org/en/handbook/3/transposition#transposing-instrumen… for a start.