Why are those little hashtags in sheet music?

[887]

My friend is a violin player, and I just glanced at her sheet music. And I saw three little hashtags in the corner. I asked her what those hashtags were, and she just looked at me like I'm an idiot. Seriously, what idiot writes hashtags on music??

[Rachel]

. . . . .. . . . . . . . . . . ,.-‘”. . . . . . . . . .``~.,
. . . . . . . .. . . . . .,.-”. . . . . . . . . . . . . . . . . .“-.,
. . . . .. . . . . . ..,/. . . . . . . . . . . . . . . . . . . . . . . ”:,
. . . . . . . .. .,?. . . . . . . . . . . . . . . . . . . . . . . . . . .\,
. . . . . . . . . /. . . . . . . . . . . . . . . . . . . . . . . . . . . . ,}
. . . . . . . . ./. . . . . . . . . . . . . . . . . . . . . . . . . . ,:`^`.}
. . . . . . . ./. . . . . . . . . . . . . . . . . . . . . . . . . ,:”. . . ./
. . . . . . .?. . . __. . . . . . . . . . . . . . . . . . . . :`. . . ./
. . . . . . . /__.(. . .“~-,_. . . . . . . . . . . . . . ,:`. . . .. ./
. . . . . . /(_. . ”~,_. . . ..“~,_. . . . . . . . . .,:`. . . . _/
. . . .. .{.._$;_. . .”=,_. . . .“-,_. . . ,.-~-,}, .~”; /. .. .}
. . .. . .((. . .*~_. . . .”=-._. . .“;,,./`. . /” . . . ./. .. ../
. . . .. . .\`~,. . ..“~.,. . . . . . . . . ..`. . .}. . . . . . ../
. . . . . .(. ..`=-,,. . . .`. . . . . . . . . . . ..(. . . ;_,,-”
. . . . . ../.`~,. . ..`-.. . . . . . . . . . . . . . ..\. . /\
. . . . . . \`~.*-,. . . . . . . . . . . . . . . . . ..|,./.....\,__
,,_. . . . . }.>-._\. . . . . . . . . . . . . . . . . .|. . . . . . ..`=~-,
. .. `=~-,_\_. . . `\,. . . . . . . . . . . . . . . . .\
. . . . . . . . . .`=~-,,.\,. . . . . . . . . . . . . . . .\
. . . . . . . . . . . . . . . . `:,, . . . . . . . . . . . . . `\. . . . . . ..__
. . . . . . . . . . . . . . . . . . .`=-,. . . . . . . . . .,%`>--==``
. . . . . . . . . . . . . . . . . . . . _\. . . . . ._,-%. . . ..`\



I have lost faith in all humanity

[☢ ASOT600 ☢]

It means a note is 'sharp'. Let's take the note 'C'. 'C#' means (apart from being a programming language) that you play the BLACK note, ONE TO THE RIGHT of the standard 'C' white note. Here's a nice diagram:

http://www.piano-keyboard-guide.com/imag...gram_2.JPG

Notice that sharp notes (#) are always one to the RIGHT, whereas flat notes (b) are one to the LEFT. Obviously a C# is the same as a D flat. If you look at C flat though (ie the black note one to the left of white C), there isn't one. There's a gap.

[Clove Horan]

can i stab you please

[Chloe Tiscali]

* FacePalm*
They mean that the line that the "Hashtag" is on you play as a sharp not as a normal. Unless instructed otherwise.

[Laurel]

That little 'hashtag' indicates a note that is sharp, which means a half-step higher than it would regularly be. Since there were three, your friend has to play three notes sharp each time she comes across it in her music.

[dlashof]

Every single "Idiot" that has ever written music uses "hashtags - #" that is the international symbol for sharps. Without them and the "b" (although it is slanted) that is used to symbolize a flat, that is how you define the key that the music is written in. They have been used for that a long time before Twitter came along.

[Fat Patricia]

honey, you're embarrassing our generation.

The "hashtag" (actually a "sharp") means to play the note you would normally play one half-step above it.(usually the black key--for a piano) since there were three "hashtags" every time your friend sees an F, C, or a G, she will play an F#, C#, or G# unless otherwise instructed