EchoWave Client 3 EchoWave Client 3 Requirements Windows 7 SP1 or higher. Microsoft .Net 4.6.1 or higher. EchoWave Server 2 or higher with EchoWave Services installed and running. EchoWave Services Requirements (Installed on EchoWave Server) Windows 7 SP 1 or higher. Microsoft .Net 4.6.1 or higher.