Instrument selected in 'Instruments', has no sound or 'wrong' sound when selected in Mixer
this is mostly for clarification, but, if I understand incorrectly, a correction would be great..... I want to add Sandpaper Blocks to a score. I can find it in Stave Properties/Change Instruments as part of 'All instruments' or in 'Classroom'. The sound that comes with the choice is a cymbal. I go to Mixer to change the Sound, and I do not find 'Sandpaper Blocks'. So, I am unable to add Sandpaper Blocks. I can do a sort-of workaround by using 'Breath Noise' but it's just not the same.
If I understand the handbook correctly, this is because Sandpaper Blocks sound is not included in the default MuseScore Soundfont set. Therefore, I suppose I need to find a Sandpaper soundfont somewhere and add it, per the instructions in the manual. I'm not sure where to find such a sound file, but I know how to look. But, before I do the searching, is my analysis correct? And if so, a mild comment -- if the sound is not included, why is it listed in the Instrument list? Thanks.