6.4.9 Writing music in parallel

Music for multiple parts can be interleaved

     
     \parallelMusic #'(voiceA voiceB) {
       r8     g'16[ c''] e''[ g' c'' e''] r8     g'16[ c''] e''[ g' c'' e''] |
       c'2                                c'2                                |
       r8     a'16[ d''] f''[ a' d'' f''] r8     a'16[ d''] f''[ a' d'' f''] |
       c'2                                c'2                                |
     }
     \new StaffGroup <<
       \new Staff \new Voice \voiceA
       \new Staff \new Voice \voiceB
     >>

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