You can obtain a Loopback license key by purchasing a license from the SoundSource website or an authorized reseller. Once you've made the purchase, you'll receive an email with the license key and instructions on how to activate it.
“A loopback license key never contacts an external vendor server. Instead, the license validation request is sent to a local service running on 127.0.0.1. This is ideal for air-gapped systems.”
