edl->local_session->zoom_atrack = zoom;
for( Track *track= edl->tracks->first; track; track=track->next ) {
if( track->data_type != TRACK_AUDIO ) continue;
edl->local_session->zoom_atrack = zoom;
for( Track *track= edl->tracks->first; track; track=track->next ) {
if( track->data_type != TRACK_AUDIO ) continue;