static mlt_frame filter_process( mlt_filter this, mlt_frame frame )
{
// Only call this if we have a means to get audio
- if ( mlt_frame_is_test_audio( frame ) != 0 )
+ if ( mlt_frame_is_test_audio( frame ) == 0 )
{
// Push the filter on to the stack
mlt_frame_push_audio( frame, this );