added loudspeaker response for tutorial

a23c05bf · Jan-Gerrit Richter · 9aa13e8c · a23c05bf · a23c05bf
Commit a23c05bf authored Jan 13, 2017 by Jan-Gerrit Richter
--- a/tutorials/loudspeaker_response.ita
+++ b/tutorials/loudspeaker_response.ita
--- a/tutorials/loudspeaker_response_raw.ita
+++ b/tutorials/loudspeaker_response_raw.ita