Sound credits

Every sound in ChaChing Alerts came from Wikimedia Commons. Each one is trimmed to under two seconds, levelled to a consistent volume and encoded as mono MP3, so no sound is louder than another. The originals are linked below.

Sound sources, licences and attribution
Sound	Original	Licence	By
Cha-ching	Cha Ching RegisterBy Laxerboyd	CC BY-SA 4.0	Laxerboyd
Cash register	Cash registerBy n/a	Public domain	n/a
Level Up	Level Up 1By Gravity Sound	CC BY 4.0	Gravity Sound
Gong	Gong or bell vibrant (short)By stephan	CC0	stephan
Vibraphone	Vibes Cm7By Serolillo	CC BY 2.5	Serolillo
Marimba	Attraction MarimbaBy see source page	CC BY 4.0	see source page
Coins	Coins dropped in metallic moneyboxBy ezwa	Public domain	ezwa

The Points option is not a recording. It is generated in your browser as you hear it, so it carries no third-party licence.

What these licences ask for

Public domain and CC0: Free to use. Nothing is required of anyone.
CC BY 2.5 and CC BY 4.0: The author must be credited. This page is that credit.
CC BY-SA 4.0: The author must be credited, and any adapted version of that clip stays under the same licence. Our trimmed and normalised copy is such an adaptation and is licensed CC BY-SA 4.0. That applies to the audio file on its own, and places no obligation on anything else.