Hello all, I'm trying this code in Delphi but it does not seem to work: LStub1:= 1; LStub2:= 0; acmStreamMessage(hStream, ACMDM_USER+30, LStub1, LStub2); // 30 = SPEEX_SET_VAD Is there a way to turn VAD on for Speex ACM? Thanks in advance, Ivan.