Tweak new live coding intro section

Author: samaaron

etc/doc/tutorial/en/01.1-Live-Coding.md

@@ -7,10 +7,10 @@ Sonic Pi on stage and gig with it.
 
 ## Free your mind
 
-Before we get into the real details of how Sonic Pi works in this
-tutorial, I'd like to give you an experience of what it's like to live
-code. Don't worry if you don't understand much (or any) of this. Just
-try to hold onto your seats and enjoy...
+Before we get into the real details of how Sonic Pi works in the rest of
+this tutorial, I'd like to give you an experience of what it's like to
+live code. Don't worry if you don't understand much (or any) of
+this. Just try to hold onto your seats and enjoy...
 
 ## A live loop
 
@@ -24,14 +24,19 @@ end
 ```
 
 Now, press the `Run` button and you'll hear a nice fast bass drum
-beating away. Now, whilst it's still running, change the sleep
-value. Try something higher like `1`. Press the `Run` button again -
-notice how the drum speed has changed. Also, *remember this moment*, this
-is the first time you've live coded with Sonic Pi and it's unlikely to
-be your last...
+beating away. If at any time you wish to stop the sound just hit the
+`Stop` button. Although don't hit it just yet... Instead, follow these steps:
 
-Let's add something else into the mix. Above `sample :bd_haus` add the
-line `sample :ambi_choir, rate: 0.3`. Your code should look like this:
+1. Make sure the bass drum sound is still running
+2. Change the `sleep` value from `0.5` to something higher like `1`. 
+3. Press the `Run` button again
+4. Notice how the drum speed has changed. 
+5. Finally, *remember this moment*, this is the first time you've live
+   coded with Sonic Pi and it's unlikely to be your last...
+
+Ok, that was simple enough. Let's add something else into the mix. Above
+`sample :bd_haus` add the line `sample :ambi_choir, rate: 0.3`. Your
+code should look like this:
 
 
 ```
@@ -43,8 +48,12 @@ end
 ```
 
 Now, play around. Change the rates - what happens when you use high
-values, or small values? What happens if you choose a really small
-`sleep` value? Can you make it go so fast your computer can't keep up?
+values, or small values or negative values? See what happens when you
+change the `rate:` value for the `:ambi_choir` sample just slightly (say
+to 0.29). What happens if you choose a really small `sleep` value? See
+if you can make it go so fast your computer will stop with an error
+because it can't keep up (if that happens, just choose a bigger `sleep`
+time and hit `Run` again).
 
 Try commenting one of the `sample` lines out by adding a `#` to the
 beginning:
@@ -62,18 +71,19 @@ Notice how it tells the computer to ignore it, so we don't hear it. This
 is called a comment. In Sonic Pi we can use comments to remove and add
 things into the mix.
 
-Finally, let me leave you something to play with. Take the code below,
+Finally, let me leave you something to fun play with. Take the code below,
 and copy it into a spare workspace. Now, don't try to understand it too
 much other than see that there are two loops - so two things going round
 at the same time. Now, do what you do best - experiment and play
 around. Here are some suggestions
 
 * Try changing the blue `rate:` values to hear the sample sound change
-* Try changing the `sleep` times and hear that both loops can spin round at
-different rates. 
-* Try uncommenting the two sample lines and enjoy the sound of the
-guitar played backwards.
-* Try changing any of the blue numbers
+* Try changing the `sleep` times and hear that both loops can spin round
+  at different rates.
+* Try uncommenting the sample line (remove the `#`) and enjoy the sound
+  of the guitar played backwards.
+* Try changing any of the blue `mix:` values to numbers between `0` (not
+  in the mix) and `1` (fully in the mix).
 
 
 Remember to press `Run` and you'll hear the change next time the loop
@@ -84,19 +94,23 @@ jam again. Making mistakes is how you'll learn the quickest...
 
 ```
 live_loop :guit do
-  with_fx :flanger, mix: 1, depth: 5 do
+  with_fx :echo, mix: 0.3, phase: 0.25 do
     sample :guit_em9, rate: 0.5
   end
 #  sample :guit_em9, rate: -0.5
-#  sample :guit_em9, rate: -0.25
   sleep 8
 end
 
 live_loop :boom do
-  with_fx :reverb, room: 0.9 do
+  with_fx :reverb, room: 1 do
     sample :bd_boom, amp: 10, rate: 1
   end
   sleep 8
 end
 ```
 
+Now, keep playing and experimenting until your curiosity about how this
+all actually works kicks in and you start wondering what else you can do
+with this. You're now ready to read the rest of the tutorial.
+
+So what are you waiting for...