Message pop (when you send a message):

https://audio.nostr.build/0c344cf6cb799f31d200507db9ba86259004c09f1bd9fecd7d7f4d69e441e5c8.mp3

Message pop (when you receive a message, while using the app / the chat is open):

https://audio.nostr.build/90025a89fefe3439dfc2ec97c5d67a4f0af5b9ce0d63a2ba90e5b3f1f6b64a78.mp3

Double pop (not sure what to use this for... perhaps a pop-up message?):

https://audio.nostr.build/5a14e9e7e83c67ed30c3ef5fa537ebc6d5f68208953a8325f663c2ccce4e5a68.mp3

For Zaps, I couldn't figure out an 'electric' sound without sounding bad, but considering zaps are money, so went with coin sounds.

Zap (When sending someone):

1.

https://audio.nostr.build/0d0621b898b92d2cc5684745a305bf0bc8f6e5b76eea1a7dbcc5e683ef2328e4.mp3

2.

https://audio.nostr.build/49a49de559f1945bd1ee9aa6c2495b80ded9210aa70a70f9ad045079740cd4fc.mp3

Zap (When receiving):

1.

https://audio.nostr.build/640a195072d314ca81c57e3479c3b4b9f1e7395a594c315d2201d9a91549d35a.mp3

2.

https://audio.nostr.build/201133cd2c3b8d4430ffbbe2687332058c42b59ace9927766e7c144ee2c09e6b.mp3

Call ringtone:

1.

https://audio.nostr.build/40d3c0ce60a81afa766949303b216b977eabc8f2c05e15a0cf6d40aea90d21e2.mp3

2. (with an extra sound):

https://audio.nostr.build/20590127923c7f67a8300be6a00d67f11d3d4075c0a4cdbbd05753ff282f93da.mp3