Editing Round (music) (section)

==Mechanics==
{{Blockquote|The canon, or rule, of a simple round is that each voice enters after a set interval of time, at the same pitch, using the same notes.{{sfn|Mead|2007|p=371}}}}

[[File:Row your boat.svg|thumb|upright=2.0|"Row, Row, Row Your Boat"{{audio|Row Your Boat round.mid|Play round}}]]
Rounds work because after the melody is divided into equal-sized blocks of a few [[bar (music)|measures]] each, corresponding notes in each block either are the same, or are different notes in the same [[chord (music)|chord]]. This is easiest with one chord, as in "Row, Row, Row Your Boat".{{audio|Row, Row, Row Your Boat.ogg|Play melody}}

A new part can join the singing by starting at the beginning whenever another part reaches any asterisk in the above music. If one ignores the [[eighth note]]s that [[nonchord tone|pass]] between the main chords, every single note is in the [[tonic (music)|tonic]] triad—in this case, a C, E, or G.

Many rounds involve more than one chord, as in "Frère Jacques" {{audio|Frère Jacques.ogg|Play melody}}:
{{multiple image|align=center
|image1=Frère Jacques.svg|width1=400
|image2=Frère Jacques four voice round.png|width2=300
|footer="Frère Jacques", traditional four voice round {{audio|Frère Jacques.mid|Play round}}}}

The texture is simpler, but it uses a few more notes; this can perhaps be more easily seen if all four parts are run together into the same two measures:
{{Image frame|mode=no|align=center|content=
<score raw sound>
\header { tagline = ##f }

% LilyPond doesn't easily want to align 4 voices, some with different lengths.
% So we create a print score, using 2 voices with some chords, and a MIDI score of 4 voices.
global = { \key f \major \time 4/4 }
firstP  = \relative c'' { \global \repeat unfold 2 { \stemUp c8 d c bes a4 f } \bar "||" }
secondP = \relative c'' { \global \repeat unfold 2 { \stemDown <a f>4 <bes g c,>  <c f,>2 } }
thirdP  = \relative c'  { \global \repeat unfold 2 { \stemDown s2. f4 } }

first  = \relative c'  { \global \repeat unfold 2 { f4\fff g a f } }
second = \relative c'' { \global \repeat unfold 2 { a4 bes c2 } }
third  = \relative c'' { \global \repeat unfold 2 { c8 d c bes a4 f } }
fourth = \relative c'  { \global \repeat unfold 2 { f4\pppp c f2 } }

kords = \chordmode { \repeat unfold 2 { f4 c:7 f2 } }

\score {
  <<
    \new ChordNames { \kords }
    \new Staff << \firstP \\ \secondP \\ \thirdP >>
  >>
  \layout { }
}

% The MIDI part plays the 4 voices, but not the chords.
\score {
  <<
    \new Staff \with { midiInstrument = "trumpet" } \new Voice \first
    \new Staff \with { midiInstrument = "violin"  } \new Voice \second
    \new Staff \with { midiInstrument = "celesta" } \new Voice \third
    \new Staff \with { midiInstrument = "tuba"    } \new Voice \fourth
  >>
  \midi { \tempo 4=102 }
}
</score>
|caption=All four parts simultaneous: [[authentic cadence]]}}

The second [[beat (music)|beat]] of each measure does not sketch out a tonic triad, it outlines a [[dominant (music)|dominant]] seventh chord (or "V7 chord").
[[File:Viva, Viva la Musica Michel Praetorius three voice round.png|thumb|"Viva, Viva la Musica", three voice round by [[Michael Praetorius]] (1571–1621){{sfn|MacDonald|Jaeger|2006|p=8}} {{audio|Viva, Viva la Musica Michel Praetorius three voice round.mid|Play}}]]