\score {
\transpose c c' \context PianoStaff <<
- \context Staff = "up" { \clef "G" }
- \context Staff = "down" { \clef "F" }
+ \new Staff = "up" { \clef "G" }
+ \new Staff = "down" { \clef "F" }
{ \applyMusic #transform {
\pat {c e g c' e' }
\pat {c d a d' f' }