Feature request: Please complete MuseScore's default soundfont.

I need to withdraw my feature request, and instead ask for some guidance in using unpitched percussion.

Part of my issue was that I didn't really know how to enter unpitched percussion correctly. But I found your thread on that topic at https://musescore.org/en/node/274702 Thank you for that.

The other, more major part, is that most of the sounds do not sound at all like real life to me. The sleigh bells come closest. But I cannot get the others to work. Here are some examples.

The shakers have too fast of a decay. IMHO, they need to have a more sustained "shhhhhhsh" sound. The other thing is that, even though they are much, much quieter than a frame drum (in the soundfont a timpani), their timbre is heard clearly in spite of the volume of the frame drum. In the case of MuseScore playback, relative volume seems to dominate, and the effects of the shaker keeping the same rhythm as the frame drum are not heard at all. For some reason, the volume drowns them out even though, in real life, they add a special timbre to the rhythm.

The other issue that I have, is that all of the unpitched sounds (except the sleigh bell and perhaps some that I have not tried), sound like they are a one shot strike. Whereas one should be able to have whole notes tied across measures where a tamborine or a shaker or a rattle (in the sound font a morocca) produce a continuous shaking sound. Note duration and "Tr" ornamentation have no effect. Repeated 32nd notes do not sound at all like the instruments; they sound flat and sterile.

I struggle to produce Native American music. For the Native American Flute, I use a Baroque Oboe. For the frame drum, I use a Timpani. I still have not found sounds suitable for a shaker (even though you define one), or a rattle (which I would expect a Moracca to sound like). I also use Baroque Oboe for a Shakuhachi.

Here are some other sounds that, to me, do not sound anything like their names imply:
The thundersheet is a high-pitched wimpy sound (I envision a thundersheet as a large sheet of aluminum that sounds like thunder when you shake it).
The hand clap sounds like a gun shot.
The finger snap sounds like a high pitched wood block.
The slap sounds like a knock at the door.
The stamp sound like a stick hitting a piece of wood.

Pehaps a better feature request would be to provide a more realistic soundfont.

But for now, let me just request some help in utilizing existing sounds that work for Native American, and also Asian, music.