<div>Setting conference_set_auto_outcall_flags=mute only sets the initial state to muted. The attendees can still press 0 to unmute (if the key mappings are left at their default values). So you can use send_dtmf to unmute the loopback extension, and then stream the audio.</div>
<div> </div>
<div>E.g., expanding my code from earlier:</div>
<div> </div>
<div>streamwelcomefile.lua<br><code><br> <br>if ( session:ready() ) then<br> session:answer();</div>
<div> -- Must wait a couple seconds after connecting before sending DTMF, </div>
<div> -- or it will get lost:<br> session:sleep(2000)</div>
<div> -- Unmute this attendee:</div>
<div> session:execute("send_dtmf","<a href="mailto:0@200" target="_blank">0@200</a>")</div>
<div> session:sleep(1000)<br> session:streamFile("ivr/8000/ivr-welcome.wav");<br> session:streamFile("ivr/8000/ivr-thank_you_for_calling.wav");<br> session:hangup("NORMAL_CLEARING");<br>
end<br> <br></code><br></div>