Double click on a track to display the notation editor.
Use pencil to enter notes. The icon tools at left allow changing time and flat/sharp.
Use pointer to select many notes.
Add slur by selecting multiple notes, then Phrase/Add Slur
If you add a note to wrong place, it can be dragged to other place
Add a measure
In the main screen where the tracks are displayed:
Use click and drag to copy a track.
Click at the end of a track and drag to add measures. The cursor changes to
a double arrow cursor if the cursor is at the right part of where the track ends.
Click on the "T" button, then click on the note where the dynamics should be placed below.
Save Rosegarden to Sound File
Start Audacity
Select menu Edit Preferences
Select MIDI Devices
Select Host: ALSA
Start recording (Red Circle)
Press Play in Rosegarden
Trumpet Example
The trumpets sound in fields/game/doll-data/trumpets.ogg was created by copying some public domain music.
The music is 3 Jazz Duets from Rondeau and is from
https://musopen.org/music/21683-3-jazz-duets/.
It was entered by hand into Rosegarden. It was saved to a sound that can be played using Audacity.