   <a href="#_sub5" class="code" title="subfunction request_pause(varargin)">request_pause</a>
0306   
0307     <span class="comment">% Help</span>
0308     <span class="keyword">elseif</span> strcmp( keypressed, <span class="string">'h'</span>);
0309         <a href="#_sub20" class="code" title="subfunction audio_instr()">audio_instr</a>
0310 
0311 
0312     <span class="keyword">elseif</span> strcmp( keypressed, <span class="string">'t'</span>);
0313        acq.threshold = acq.threshold + 0.01;
0314 
0315