Tutorial - fix minor spelling issues

Author: samaaron

etc/doc/tutorial/10.1-Set-and-Get.md

@@ -30,7 +30,7 @@ set :intensity, 3000
 
 In the above example, as we stored both numbers under the same key, the
 last call to `set` 'wins', so the number associated with `:intensity`
-will be `3000` as the first call to `set` is effectively overriden.
+will be `3000` as the first call to `set` is effectively overridden.
 
 ## Get
 
@@ -156,7 +156,7 @@ live_loop :sorted do
 end
 ```
 
-Notice how this code is pretty much idential to the version using
+Notice how this code is pretty much identical to the version using
 variable before it. However when you run the code, it behaves as you
 would expect with any typical Sonic Pi code - *it does the same thing
 every time* in this case thanks to the Time State system.

etc/doc/tutorial/11-MIDI.md

@@ -8,7 +8,7 @@ syntax and sound system can be exciting and put you into a new creative
 position. However, sometimes it is essential to break out of the code
 into the real world. We want two extra things:
 
-1. To be able to convert actions in the real world into Sonic Pi events to work with programtically 
+1. To be able to convert actions in the real world into Sonic Pi events to code with
 2. To be able to use Sonic Pi's strong timing model and semantics to control and manipulate objects in the real world
 
 Luckily there's a protocol that's been around since the 80s that enables

etc/doc/tutorial/11.1-MIDI-In.md

@@ -26,7 +26,7 @@ room: http://gitter.im/samaaron/sonic-pi
 ## Receiving MIDI Events
 
 Once your device is connected, Sonic Pi will automatically receive
-events. You can see for yourself by manipulating yoru MIDI device and
+events. You can see for yourself by manipulating your MIDI device and
 looking at the cue logger in the bottom right of the application window
 below the log (if this isn't visible go to Preferences->Editor->Show &
 Hide and enable the 'Show cue log' tickbox). You'll see a stream of
@@ -136,7 +136,7 @@ that easy!
 ## Getting Values
 
 Finally, as our MIDI events are going straight into the Time State, we
-can also use the `get` fn to retreive the last seen value. This doesn't
+can also use the `get` fn to retrieve  the last seen value. This doesn't
 block the current thread and returns `nil` if there's no value to be
 found (which you can override by passing a default value - see the docs
 for `get`). Remember that you can call `get` in any thread at any time

etc/doc/tutorial/11.2-MIDI-Out.md

@@ -3,7 +3,7 @@
 # MIDI Out
 
 In addition to receiving MIDI events we can also send out MIDI events to
-trigger and control external hardward synths, keyboards and other
+trigger and control external hardware synths, keyboards and other
 devices. Sonic Pi provides a full set of fns for sending various MIDI messages such as:
 
 1. Note on - `midi_note_on`

etc/doc/tutorial/12.1-Receiving-OSC.md

@@ -6,7 +6,7 @@ By default when Sonic Pi is launched it listens to port 4559 for
 incoming OSC messages from programs on the same computer. This means
 that without any configuration, you can send Sonic Pi an OSC message and
 it will be displayed in the cue log just like incoming MIDI
-messages. This also means that any incomign OSC message is also
+messages. This also means that any incoming OSC message is also
 automatically added to the Time State which means you can also use `get`
 and `sync` to work with the incoming data - just like with MIDI.
 
@@ -64,12 +64,12 @@ address (a unique identifier for your computer on your network - kind of
 like a phone number or an email address). You can discover the IP
 address of your computer by looking at the IO section of the preferences
 pane. (If your machine happens to have more than one IP address,
-hovering the mouse over the listed address will popup a list of all
-known addresses).
+hovering the mouse over the listed address will pop up with a list of
+all known addresses).
 
 Note, some programs such as TouchOSC for iPhone and Android support
 sending OSC as a standard feature. So, once you're listening to remote
-machines and know your IP adress you can instantly start sending
+machines and know your IP address you can instantly start sending
 messages from apps like TouchOSC which enable you to build your own
 custom touch controls with sliders, buttons, dials etc. This can provide
 you with an enormous range of input options.