Addressed README.md comments.
diff --git a/samples/drumthumper/README.md b/samples/drumthumper/README.md
index 3efffa9..972231e 100644
--- a/samples/drumthumper/README.md
+++ b/samples/drumthumper/README.md
@@ -5,6 +5,8 @@
 ## Abstract
 **DrumThumper** (apolgies to [Chumbawamba](https://www.youtube.com/watch?v=2H5uWRjFsGc)) is a "Drum Pad" app which demonstrates best-practices for low-latency audio playback using the Android **Oboe** API.
 **DrumThumper** consists of a set of trigger pad widgets and an optional UI for controlling the level and stereo placement of each of the virtual drums.
+The audio samples are stored in application resources as WAV data. This is parsed and loaded (by routines in **parselib**) into memory blocks.
+The audio samples are mixed and played by routines in **iolib**.
 
 **DrumThumper** is written in a combination of Kotlin for the UI and JNI/C++ for the player components (to demonstrate accessing native code from a Kotlin or Java application).
 
@@ -20,7 +22,7 @@
 Classes for playing audio data.
 
 * **parselib**
-Classes for parsing and loading audio data.
+Classes for parsing and loading audio data from WAV resources.
 
 ## App
 * DrumPlayer.kt
diff --git a/samples/parselib/README.md b/samples/parselib/README.md
index c6eab6d..36f8167 100644
--- a/samples/parselib/README.md
+++ b/samples/parselib/README.md
@@ -3,7 +3,7 @@
 Classes for parsing and loading audio data.
 
 ## Abstract
-(Oboe) ack contains facilities for reading and loading audio data from streams. Streams can be wrapped around either files or memory blocks (as from resources).
+(Oboe) **parselib** contains facilities for reading and loading audio data from streams. Streams can be wrapped around either files or memory blocks.
 
 **parselib** is written in C++ and is intended to be called from Android native code. It is implemented as a static library.
 
@@ -31,14 +31,15 @@
 Contains classes to read/load audio data in WAV format. WAV format files are "Microsoft Resource Interchange File Format" (RIFF) files. WAV files contain a variety of RIFF "chunks", but only a few are required (see 'Chunk' classes below)
 
 ### Utility
-#### AudioEcoding
+#### AudioEncoding
 Defines constants for various audio encodings
 
 ### WavTypes
 Support for **RIFF** file types and managing FOURCC data.
 
 ### WAV Data I/O
-#### WaveStreamReader
+#### WavStreamReader
+Parses and loads WAV data from an InputStream.
 
 ### WAV Data
 #### WavChunkHeader