\def\abcmusix{N}
\input header

\def\freqbarno{99}
\generalsignature{0}%
\def\nbinstruments{2}

\def\Zu#1#2{\zcharnote{-14}{\tt #1}\qu#2}
\def\Zl#1#2{\zcharnote{-14}{\tt #1}\ql#2}
\def\Yu#1#2{\zcharnote{-32}{\tt #1}\qu#2}
\def\Yl#1#2{\zcharnote{-32}{\tt #1}\ql#2}

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

\centerline{Central octaves with inner ledger lines}

\cleftoksi{6}
\cleftoksii{0}
\generalmeter{\meterfrac{}{}}%

\normal\elemskip=18pt%

\debutextrait%
\notes
\Zu{C'}{J}%
\Zl{D'}{K}\Zl{E'}{L}\Zl{F'}{M}\Zl{G'}{N}\Zl{A'}{a}\Zl{B'}{b}\Zl{C''}{c}%
\Zl{D''}{d}\Zl{E''}{e}\Zl{F''}{f}\Zl{G''}{g}\Zl{A''}{h}
\Zl{B''}{i}\Zl{C'''}{j}%
\enotes
\notes
&%
\Yu{c,,}{J}\Yu{d,,}{K}\Yu{e,,}{L}\Yu{f,,}{M}\Yu{g,,}{N}\Yu{a,,}{a}%
\Yu{b,,}{b}%
\Yu{c,}{c}\Yu{d,}{d}\Yu{e,}{e}\Yu{f,}{f}\Yu{g,}{g}\Yu{a,}{h}\Yu{b,}{i}%
\Yl{c}{j}
\enotes
\finextrait

\vbox to 3mm{}
\centerline{Extreme octaves with outer ledger lines}

\normal\elemskip=18pt

\debutextrait%
\notes
\Zu{A,}{A}\Zu{B,}{B}
\Zu{C}{C}%
\Zu{D}{D}\Zu{E}{E}\Zu{F}{F}\Zu{G}{G}\Zu{A}{H}\Zu{B}{I}\Zu{C'}{J}%
\enotes
\notes
&%
\Yl{c}{j}\Yl{d}{k}\Yl{e}{l}\Yl{f}{m}\Yl{g}{n}\Yl{a}{o}\Yl{b}{p}%
\Yl{c'}{q}\Yl{d'}{r}\Yl{e'}{s}\Yl{f'}{t}\Yl{g'}{u}\Yl{a'}{v}%
\Yl{b'}{w}\Yl{c''}{x}%
\enotes
\finextrait

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

\vbox to 3mm{}
\centerline{Lower staff as treble clef}

\cleftoksi{0}
\cleftoksii{0}
\generalmeter{\meterfrac{}{}}%
\normal\elemskip=20pt%

\debutextrait%
\notes
\Zu{C,}{J}\Zu{D,}{K}\Zu{E,}{L}\Zu{F,}{M}\Zu{G,}{N}\Zu{A,}{a}%
\Zu{B,}{b}%
\Zu{C}{c}\Zu{D}{d}\Zu{E}{e}\Zu{F}{f}\Zu{G}{g}\Zu{A}{h}\Zu{B}{i}%
\Zl{C'}{j}
\Zl{D'}{k}\Zl{E'}{l}\Zl{F'}{m}\Zl{G'}{n}\Zl{A'}{o}\Zl{B'}{p}%
\Zl{C''}{q}
%\Zl{D''}{r}\Zl{E''}{s}\Zl{F''}{t}\Zl{G''}{u}\Zl{A''}{v}%
%\Zl{B''}{w}\Zl{C'''}{x}%
\enotes
\finextrait

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

\vbox to 3mm{}
\centerline{Upper staff as bass clef}

\cleftoksi{6}
\cleftoksii{6}
\generalmeter{\meterfrac{}{}}%
\normal\elemskip=20pt%

\debutextrait%
\notes
&%
\Yu{a,,}{A}\Yu{b,,}{B}
\Yu{c,}{C}%
\Yu{d,}{D}\Yu{e,}{E}\Yu{f,}{F}\Yu{g,}{G}\Yu{a,}{H}\Yu{b,}{I}\Yu{c}{J}%
\Yl{d}{K}\Yl{e}{L}\Yl{f}{M}\Yl{g}{N}\Yl{a}{a}\Yl{b}{b}\Yl{c'}{c}%
\Yl{d'}{d}\Yl{e'}{e}\Yl{f'}{f}\Yl{g'}{g}\Yl{a'}{h}
\Yl{b'}{i}\Yl{c''}{j}%
\enotes
\finextrait

\end%
