ti.trail.editBegin( edit );
try {
ti.trail.editInsert( this, insertSpan, edit );
if( ti.trail instanceof AudioTrail ) {
audioTrail = (AudioTrail) ti.trail;
audioTrail.editAdd( this, audioTrail.allocSilent( insertSpan ), edit );
}
}
finally {
ti.trail.editEnd( edit );
}