It has often occurred to me how playing fast pieces of music is quite often to be heard on traditional music ( particularly concertina tunes).. or at least a number of them.
And it is often just as much a challenge to play also the slower pieces; for there is just as much skill in sustaining a slow tune as a very quick one. It is that need to find a way to hold the note a while and in a more sedate manner, to take a moments pause between notes maybe, or to make the sound breathe gently.
There's no one way of doing this,except by playing, and finding your own way; less pressure, more care in bellows use ( Anglo particularly).. slow it all down for a change and try something different; slow and gentle !