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I'm working with a section of music where the right hand (treble clef) plays the same thing twice, but the left hand (bass clef) differs the second time round.

Usually I would just rewrite out the second treble part identically, but I was just wondering if there was a special, accepted way of representing this more compactly.

Even as I ask this question I realise there would be unnecessary difficulty in matching up the notes when sight reading, but still I'd like to hear any suggestions you have.

Thank you :)

PS: Now I'm thinking it might be possible to align the second bass part underneath the first, with the bar lines matching....hmmm

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You should accept Luke's answer. It's better than mine. – luser droog Aug 6 '12 at 4:38
Thats good of you - I think you meant awe's answer – Aralox Aug 6 '12 at 8:11
up vote 6 down vote accepted

Examples for beat repeat, single measure repeat and double measure repeat:

Repeat examples

Also see this for more examples and details on repetition in music notation.

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It seems even the last notation here would only repeat two measures, not a whole section. – American Luke Aug 2 '12 at 12:43
@Luke: Yes, when using double slash, it means repeat two measures unless specified with a number above. I have actually never seen repetition more than 2 measures, but I'm sure it exists. In this example you see that there is also a vertical line across the middle, wich also indicates that there are two measures, but this is how Lilypond does it. I have also seen the double percentage repeat used without the extra measure split line, but it still means repeat two measures. – awe Aug 3 '12 at 7:29

You could write it on three staves, with an instruction on one staff saying "Play first time" and an instruction on another staff saying "Play second time".

In some pieces, for instance Liszt's "Mephisto Waltz", at some points you will see three staves, one of them labeled "ossia", meaning "play this one if the other one is too difficult for you" (or sometimes "play this one if the other one is too easy for you").

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I can't vouch for how easy to read it might be in this particular case (your alignment idea sounds promising), but there is a 'normal' way to notate repeated sections like this. Dot Slash Slash Dot, centered in the measure. If more than one measure is being repeated, you indicate the extent of it with a thick line extending from the symbol to roughly the beginning and ending of the desired measures, with thick end-caps. If it continues for more than one stave, the absence of an end-cap will serve as a cue and you can repeat the symbol (in parens) hovering over the thick line on subsequent staves.

You should write the number of measures being repeated next to the symbol if it's more than one. And if it's very long, you can provide a countdown next to the reminder symbols. This is common in Band Music.

If it's a rhythmic figure, you can give it a name (fig.1, riff A, pattern alpha, etc.) either in-line when it first happens or in a side-bar and refer to it by name when needed. This is common in Guitar transcriptions.

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What is it called? I'm guessing something similar to the simile notation. – American Luke Jul 30 '12 at 13:07
I've only seen them called "percent repeats", as in this: Lilypond example repeats – Dave Jul 30 '12 at 13:30
Yes! thank you - now I remember these from stage band in high school – Aralox Jul 30 '12 at 13:57
@luserdroog I cannot find anything about the notation that you describe (with the long line and cap). I don't think it is standard notation. Do you have any sources? – American Luke Aug 2 '12 at 12:41
@Luke, you know what? I think I may have conflated the notations for repeats and rests. Good catch! – luser droog Aug 4 '12 at 3:41

If it's more than a repeated one or two-bar riff (which Bar Repeats will take care of) write it out. You're giving the player problems just to save a little bit of space.

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