can i add text to rawtobytedata ?

[Madammar]

Code:

procedure TForm1.udpreciverUDPRead(AThread: TIdUDPListenerThread;
  const AData: TIdBytes; ABinding: TIdSocketHandle);
var
AudioDataSize: Integer;
deData : TIdBytes;
straudio : string;
begin

straudio := BytesToString(AData, 6, AData[High(AData)]); // here i have tried to get the orginal Bytes without Audio1


dedata := Tobytes(straudio);
end;

i tried to keep the original bytes after cutting it out

but its always get corrupted what i am doing wrong ?