Fixing parameters

docs/reference/music/change-tempo-by.md

@@ -13,7 +13,9 @@ music.changeTempoBy(20)
 
 ### Parameters
 
-* a [number](/reference/types/number) that says how much to change the bpm (beats per minute, or number of beats in a minute of the music that the micro:bit is playing).
+* ``bpm`` is a [number](/reference/types/number) that says how much to
+  change the bpm (beats per minute, or number of beats in a minute of
+  the music that the micro:bit is playing).
 
 ### Examples
 

docs/reference/music/play-tone.md

@@ -12,8 +12,8 @@ music.playTone(440, 120)
 
 ### Parameters
 
-* `Hz` is the [Number](/reference/types/number) of Hertz (the frequency, how high or low the tone is).
+* ``frequency`` is the [number](/reference/types/number) of Hertz (how high or low the tone is).
-* `ms` is the [Number](/reference/types/number) of milliseconds that the tone lasts.
+* ``ms`` is the [number](/reference/types/number) of milliseconds that the tone lasts
 
 ## Example
 

docs/reference/music/rest.md

@@ -12,7 +12,9 @@ music.rest(400)
 
 ### Parameters
 
-* a [number](/reference/types/number) saying how many milliseconds the micro:bit should rest. One second is 1000 milliseconds.
+* ``ms`` is a [number](/reference/types/number) saying how many
+  milliseconds the micro:bit should rest. One second is 1000
+  milliseconds.
 
 ## Example
 

docs/reference/music/ring-tone.md

@@ -13,8 +13,8 @@ music.ringTone(440)
 
 ### Parameters
 
-* a [number](/reference/types/number) that says the tone's
+* ``frequency`` is a [number](/reference/types/number) that says
-**frequency** (how high-pitched or low-pitched the tone is).  This
+how high-pitched or low-pitched the tone is.  This
 number is in **Hz** (**Hertz**), which is a measurement of frequency
 or pitch.
 

docs/reference/music/set-tempo.md

@@ -11,7 +11,7 @@ This function only works on the micro:bit and in some browsers.
 
 ### Parameters
 
-* a [number](/reference/types/number) that means the bpm you want (beats per minute, or number of beats in a minute of the music that the micro:bit is playing).
+* ``bpm`` is a [number](/reference/types/number) that means the beats per minute you want (the number of beats in a minute of the music that the micro:bit is playing).
 
 ### See also
 

docs/reference/music/tempo.md

@@ -8,7 +8,8 @@ music.tempo()
 
 ### Returns
 
-* a [Number](/reference/types/number) that means the bpm (beats per minute, or number of beats in a minute of the music that the micro:bit is playing).
+* a [number](/reference/types/number) that means the beats per minute (number of
+  beats in a minute of the music that the micro:bit is playing).
 
 ### See also