Didn’t there used to be a feature to use a custom notification sound for bedtime? I’ve changed phones, and I no longer see this as an option.
I see an option under Bedtime and notifications that just take me to the system wide Android settings. There doesn’t seem to be a selector for the audio to use.
There was a big change in how Android handles notifications (just google Notification Channels), and now it ain’t possible to choose your own ringtone for them 
Thank you for your reply @jiri-urbandroid I had the same problem as @ElectroLund when changing to a new phone running 8.1.
This disappointing. It really was a nicer way to be reminded that it was bed time!
Hi, I disabled the bedtime notification sound by mistake and now I’m unable to find and select the default sound. Could someone help me download the bedtime notification audio, please?