By default HippoEDIT beeps every time after running the tool with capture output flag set.
To disable this default behavior you can change xml flag in hippoedit.config.
Put this into hippoedit.config to disable beep:
<XMLConfigSettings>
<GENERAL>
<BeepOnOutputEnd>false</BeepOnOutputEnd>
</GENERAL>
</XMLConfigSettings>
as whole hippoedit.config file, this flag is not overwritten after update.
available with beta 1.47.741 and higher