Show HN: Ambiphone, an ambient music and sound mixer (ambiph.one)

Hi everyone,

I've built a minimalist sound mixer that lets you combine music and sounds to create ambient soundscapes. I've found it really helpful for concentration. It's free and web-based (installable PWA coming soon)

There's a pretty big selection of sounds already but I'd love to hear any suggestions of sounds you'd like to be included.