Behind it is a creative weapon based on the plugin Comeback Kid. For example, tempo-synchronized, dotted or triplet delays can be created as delays. Ping-pongs can also be implemented without any problems. A free mode gives room for individual delay times that are not bound to the song tempo. A ducker expands the possibilities, for example, to discreetly enrich kick drums with delays. Also included are four exclusive presets that were screwed by KEYS author Carl-Philipp Schmeller. The original and effect signals can be controlled separately. Keylay supports the formats VST, AU and AAX.