Whitelisting pings from specific channels in muted servers

You can already mute specific channels in an unmuted server but I want to be able to do the opposite. For larger servers with lots of channels it can be a huge chore to mute all of them except for a few you want to hear from, and this would completely eliminate that need. And if you're in a conversation in a server you normally have muted, you can just whitelist the channel for a bit and not have to check neurotically for updates every few seconds.