diff --git a/README.md b/README.md
index 8406893..362f653 100644
--- a/README.md
+++ b/README.md
@@ -50,8 +50,9 @@ Now you are ready to run the doclet:
 
 1. `cd` into the `processing-doclet/ReferenceGenerator` folder.
 2. Run `ant compile`.
-3. Run `./processingrefBuild.sh` if you are updating all the repositories or `./processingrefBuild.sh processing`, `./processingrefBuild.sh sound` or `./processingrefBuild.sh video` if you are updating a single repository.
-4. After the new JSON files are created, move into `processing-website` and run `npx prettier --write content/references` to format the JSON files.
+3. Run `./processingrefBuild.sh` if you are updating all the repositories or `./processingrefBuild.sh processing`, `./processingrefBuild.sh sound` or `./processingrefBuild.sh video` if you are updating a single repository. The script requires the following external dependencies to run successfully:
+	- all repositories: `npx` for pretty-fying the doclet JSON
+	- sound library only: `jq` and `sponge` for post-processing the documentation of subclasses. Install the dependencies by calling `apt-get/brew install jq moreutils`
 
 ### Update the website
 
diff --git a/ReferenceGenerator/processingrefBuild.sh b/ReferenceGenerator/processingrefBuild.sh
index 7573b39..b97c8bc 100755
--- a/ReferenceGenerator/processingrefBuild.sh
+++ b/ReferenceGenerator/processingrefBuild.sh
@@ -58,6 +58,29 @@ if [ $# -eq 0 ]
   	FOLDERS="$PROCESSING_SOUND_PATH/src/processing/sound/*.java"
   else
     echo "Option '$1' not valid. Should be 'processing', 'sound' or 'video'"
+    exit 1
+fi
+
+if [ $# -eq 0 -o "$1" = 'sound' ]; then
+	# check for jq and sponge
+
+	HASDEPENDENCIES=0
+	if !command -v jq &> /dev/null
+	then
+		HASDEPENDENCIES=1
+	fi
+	if !command -v sponge &> /dev/null
+	then
+		HASDEPENDENCIES=1
+	fi
+	if [ $HASDEPENDENCIES -eq 1 ]; then
+		echo "Could not find dependencies 'jq' and/or 'sponge' required to build Sound library reference, please run: brew/apt-get install jq moreutils"
+		exit 1
+	fi
+
+	# sound library reference needs a clean slate to generate subclass 
+	# documentation correctly
+	rm -f $REFERENCES_OUT_PATH/sound/*
 fi
 
 echo "[REFERENCE GENERATOR] Generating new javadocs..."
@@ -73,3 +96,98 @@ javadoc -doclet ProcessingWeblet \
 	-encoding UTF-8 \
   $FOLDERS \
 	-noisy
+
+
+# move into `processing-website` and run npx prettier
+if command -v npx &> /dev/null
+then
+	echo
+	echo 'Calling `npx prettier`'
+	echo
+	npx --yes prettier --write $REFERENCES_OUT_PATH || exit 1 # TODO remove translations/en from path?
+fi
+
+# DO POST-PROCESSING FOR THE SOUND LIBRARY (move reference entries from superclasses down into subclasses)
+
+function CopyAndReplace ()
+{
+	# remove class file which was only needed to trigger generation of the per-method .json files
+	if [ ! -f "$superclass.json" ]; then
+		echo "Couldn't find superclass files, are you running this script a second time since generating the doclets?"
+		exit 1
+	fi
+	rm "$superclass.json"
+
+	echo "$superclass"
+	for infile in $superclass*; do
+		# for every _method_.json: create a copy for every subclass
+		echo " - $infile"
+		for subclass in $subclasses; do
+			outfile=`echo $infile | sed "s/$superclass/$subclass/"`
+			if [ -f $outfile ]; then
+				echo "   . $outfile already exists, subclass must have its own @webref documentation"
+			else
+				echo "   > $outfile"
+
+				# append method descriptions to subclass
+				jq --slurpfile method $infile --arg anchor "`basename $outfile .json`" '.methods += [{ "anchor": $anchor, "name": $method[0].name, "desc": $method[0].description}]' $subclass.json | sponge $subclass.json
+
+				# change @webref (sub)categories
+			  if [ "$superclass" = "SoundObject" ]; then
+					# fix discrepancy between class name and webref category name
+					prettyclass=$subclass
+					if [ "$subclass" = "Oscillator" ]; then
+						prettyclass="Oscillators" # fix category name
+				  elif [ "$subclass" = "AudioIn" ]; then
+				  	prettyclass="I/O"
+				  fi
+
+					sed -e "s,\"category\": \"SoundObject\",\"category\": \"$prettyclass\"," \
+							-e "s/\"subcategory\": \"\"/\"subcategory\": \"$subclass\"/" \
+							-e "s/\"classanchor\": \"$superclass\"/\"classanchor\": \"$subclass\"/" \
+								$infile > $outfile
+			  else
+					# all concrete classes simply replace the subcategory
+					sed -e "s/\"subcategory\": \"$superclass\"/\"subcategory\": \"$subclass\"/" \
+							-e "s/\"classanchor\": \"$superclass\"/\"classanchor\": \"$subclass\"/" \
+								$infile > $outfile
+			  fi
+			fi
+		done
+		# remove superclass method file
+	  rm "$infile"
+	done
+	echo
+	# sort methods listing in class files alphabetically
+	for subclass in $subclasses; do
+		jq '.methods|=sort_by(.name)' $subclass.json | sponge $subclass.json
+	done
+}
+
+if [ $# -eq 0 -o "$1" = 'sound' ]; then
+	echo
+	echo "Performing post-processing of Sound library reference"
+	echo
+	THISDIR=`pwd`
+	cd $REFERENCES_OUT_PATH/sound
+	superclass=SoundObject subclasses="AudioIn Noise Oscillator" CopyAndReplace # TODO AudioSample ??
+
+	# superclass=AudioSample subclasses="SoundFile" CopyAndReplace
+	superclass=Oscillator subclasses="Pulse SawOsc SinOsc SqrOsc TriOsc" CopyAndReplace
+	superclass=Noise subclasses="BrownNoise PinkNoise WhiteNoise" CopyAndReplace
+
+	superclass=Effect subclasses="AllPass Delay Filter Reverb" CopyAndReplace
+	superclass=Filter subclasses="BandPass HighPass LowPass" CopyAndReplace
+
+	superclass=Analyzer subclasses="Amplitude BeatDetector FFT PitchDetector Waveform" CopyAndReplace
+	cd "$THISDIR"
+	echo "Sound library post-processing completed."
+fi
+
+
+if ! command -v npx &> /dev/null
+then
+	echo 'WARNING: npx is not installed, so could not run `npx prettier --write content/references`'
+	echo '`git diff` might show lots of modified files that only differ in JSON formatting, not content.'
+	exit 1
+fi