Update README and help message

README.md

@@ -20,7 +20,9 @@ Then, checkout the sources and run `make` inside the source directory.
 Usage
 =====
 
-Usage is pretty simple.  run `./popuset --help` to see an overview of options, along with example command line usages.  Start one server and one client, (clients have the `-r` option specified) and enjoy your audio!
+`popuset` implements a fully connectable audio mesh network.  Each instance of `popuset` can be instructed to open a single device (for input, output, or both) and listens for incoming connections (on port `5040` by default, settable with the `--port/-p` option).  `popuset` instances are targeted at eachother using the `--target/-t` option.  To send audio from computer A's microphone to computer B's speakers, you would therefore instruct computer B to open its output device (using the `--device/-d` option). You would then tell computer A to open the microphone audio device (via the `--device/-d` option) and target it at computer B with the `--target/-t` option.  Note that multiple `popuset` instances can target the same output instance, and they will all be mixed together in realtime.
+
+You can "log" input/output audio to `.wav` files using the `--log/-l` option.  This is useful for debugging, or just recording audio that other users are sending your way.
 
 
 Raspi notes
@@ -46,4 +48,4 @@ Finally, download/compile this puppy:
 $ git clone https://github.com/staticfloat/popuset.git
 $ cd popuset
 $ make
-```
+```

popuset.cpp

@@ -30,7 +30,7 @@ void printUsage(char * prog_name) {
     printf("\t--log/-l:      Prefix of .wav files to log input/output to.\n");
     printf("\t--help/-h:     Print this help message, along with a device listing.\n\n");
 
-    printf("Device strings conform to: <input/output>:<name/numeric id>:<channels>\n");
+    printf("Device strings conform to: <\"input\"/\"output\">:<device name/numeric id>:<channels>\n");
     printf("Defaults: listen on port 5040, open default input/output devices with up to two channels:\n");
     printf("  %s -p 5040 -d \"input:%s:%d\" -d \"output:%s:%d\"\n\n", prog_name, input_name, input_channels, output_name, output_channels );