- Download and install SoundSource 5 from the Rogue Amoeba website.
- Once installed, open SoundSource and click Add Effect.
- From the menu that appears, search for MiniMetersServer and select it.
- Open MiniMeters and click Settings from the bottom right.
- Under the Audio Device panel and choose "MiniMeters Plugin" from the Audio Device section.
If the visuals on MiniMeters are delayed try changing the Latency from the Advanced tab inside of SoundSource's Settings.