Centralized Notification Ringtone/Sound Management

Android allows me to have different sounds (ringtones) for different notification events.  This is good.

However, each seems to be managed in isolation. This is bad.

The most important thing about sound notifications is that they be distinct, so that you can remember which is for what. Best if there is some natural connection - like the sound of mail dropping through a slot for incoming email. (Although I get so much email... this is the only natural one I can think of.)

But distinct.  Not good to have the same sound for incoming email (low priority), as for the reminder to get in the car and drive across town to an appointment you don't want to miss.

Manged in isolation, need to jump to each notifying app and change.

Want cenralised management, where I can see a list of all the different types of notifications I use, and can hear their sounds back to back.

I think Blackberry had this.  But "all the differet typs of notifications I use".  *I* *USE*.  I recall the Blackberry list had all the notifications on the phone, includng many I had no idea about.  Wasted time setting distinct notificaions, n one case thinking that incoming mssages meant incoming SMS text messages, not some other service.

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Want different notifications for calendar items.  E.g. different notifications for the "Leave now, drive 1 hour across town", and the "Pick up the phone for a meeting".