wanted to add their twitter post because it adds some more context
"While the decision to delay was made due to the additional development time required for SAROS' "special addition" to their voice database, this demo does not utilize that update. This demo is, instead, the first usage of Rap Mode for pitch generation in the lineup! (Though SAROS does not have Rap data) Koge also uses 8 of SAROS' 10 vocal modes here, but primarily as parameters and never up to 150% application."