changing rtrio to boot sonic pi

 after installing sonic pi, I try to run it, get error:

`You don't appear to have a sane system configuration.`

lol. yeah probably. 

`It is very likely that you encounter xruns.`

no idea what that means. anyway, I take the advice and add 

`  @audio          -       rtprio          99` to `/etc/security/limits.conf`

I note it here beccause I _suspect_ it's going to stop me pushing my volume levels over 100, which will probably baffle and anger me down the line.


update: 


as per my usual reckless approach, I've installed realtime-priveleges package and added my username to the realtime group. no diff

that "sane system" and "realtime scheduling" message comes from jackd. running "jackd -d backend --help" shows it in the terminal. Now I'm thinking it's to do with pulsaudio settings maybe.


did all this: https://github.com/sonic-pi-net/sonic-pi/issues/2341#issuecomment-628016039


which feels dumb, because these are big packages I'm adding and I don't know what they do


update:


welp, it still doesn't boot, but a different error this time - no ports available. can't be bothered doing more for now.

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