While some composers , notably Mozart , have used this interval to advantage in melodic composition , other composers , having felt it to be an awkward leap , particularly in vocal music , considered a whole step between these two scale degrees more conducive to smooth melody writing , so either the sixth scale degree was raised or the seventh flattened , in both cases by a semitone .
While some composers , like Mozart , have used this interval in melodic composition , other composers found it awkward .