creating music freely
https://linuxmusicians.com/
Mainly peacable vacation/cooking/napping tunes:
Graveyard Shift In The Garden
Approaching Sunset
Seabirds Rising
Swingshift Above The Garden
Point Of No Return
Well, I had the first one playing and it's nice...
but...
these are all very long!
Hi, and thanks for listening. The song length is easily adjusted, a quick whack, snip and/or fade in/out, copy-paste etc using audacity, and 30 minutes can be 6, or 60, if one desires. Personally, I've heard a lot of fine 3 minute 'non-pro' songs that I wished had been 7 minutes 
Rick Beato's resident music-biz expert, Ted Gioia has studies that show music doesn't 'sink-in' or resonate in the listener, in the few minutes allowed by airplay, or youthfull attention spans. I also use longer pieces as frames for thought, practice sessions, and the more comatose tunes for naps and sleep-sets. For example, I loved most of a pop-diva's 5 minute hit, so I whacked out the parts I didn't like, and did creative cut/paste operations on parts I wanted more of...now it's a 15 minute monnnsssstttaaaaa 
I can email 10 minute versions of a song, if there's one worth hearing twice or thrice
Cheers
I do have 80 songs on my spotify list between 3 and 8 minutes, if your app can 'sort by duration', and most of the linux spotify clients can do that.
Cheers