1. The act of rehearsing a difficult passage of a composition.
This typically where a single performer rehearses the passage
over and over until it can be performed flawlessly.    2. In
singing barbershop music, this term refers to the art of
harmonizing by ear (or without notated music). This means the
singers will create their own harmonies around a melody in the
barbershop style without notated music. Woodshedding typically
starts with the lead singing the melody of a song, often a song
unfamiliar to the others. This is followed by all four singers
singing the melody in unison. As they sing the melody in unison,
each singer needs to determine the chord progression implied by
the melody. Then each of the singers will try to sing notes that
would be typical harmonies based on that melody and implied
chord progression. This practice goes back to the early days of
barbershop music where most music was sung without notated
music. Today the practice provides a great way for singers of
barbershop music to hone th