diff --git a/RELEASENOTES.md b/RELEASENOTES.md
index e63ec8b0..b059b9d0 100644
--- a/RELEASENOTES.md
+++ b/RELEASENOTES.md
@@ -17,8 +17,8 @@ When `make install` is executed, a sample configuration is installed or updated
 If you are using metadata, please note that the option has changed somewhat. The option `-M` has a new long name equivalent: `--metadata-pipename` and the argument you provide must now be the full name of the metadata pipe, e.g. `-M /tmp/shairport-sync-metadata`.
 
 * Enchancements
- * A new, supported audio back end called `stdio`. To activate, set  `output_backend = "stdout"` in the general section of the configuration file. Output is provided synchronously with the source feed. No stuffing or stripping is done. If you are feeding it to an output device that runs slower or faster, you'll eventually get buffer overflow or underflow in that device. To include support for this back end, use the configuration option `--with-stdout`.
- * Support for the `pipe` back end has been enhanced. To activate, set  `output_backend = "pipe"` in the general section of the configuration and give the fully-specified pathname to the pipe in the pipe section of the configuration file -- see `etc/shairport-sync.conf.sample` for an example. No stuffing or stripping is done. If you are feeding it to an output device that runs slower or faster, you'll eventually get buffer overflow or underflow in that device.  To include support for this back end, use the configuration option `--with-pipe`.
+ * A new, supported audio back end called `stdio` provides raw 16-bit 44.1kHz stereo PCM output. To activate, set  `output_backend = "stdout"` in the general section of the configuration file. Output is provided synchronously with the source feed. No stuffing or stripping is done. If you are feeding it to an output device that runs slower or faster, you'll eventually get buffer overflow or underflow in that device. To include support for this back end, use the configuration option `--with-stdout`.
+ * Support for the `pipe` back end has been enhanced to provide raw 16-bit 44.1kHz stereo PCM output to a named pipe. To activate, set `output_backend = "pipe"` in the general section of the configuration and give the fully-specified pathname to the pipe in the pipe section of the configuration file -- see `etc/shairport-sync.conf.sample` for an example. No stuffing or stripping is done. If you are feeding it to an output device that runs slower or faster, you'll eventually get buffer overflow or underflow in that device.  To include support for this back end, use the configuration option `--with-pipe`.
  * Support for the `dummy` audio backend device continues. To activate, set  `output_backend = "dummy"` in  in the general section of the configuration. To include support for this back end, use the configuration option `--with-dummy`.
  * Limited support for the PulseAudio audio backend continues. To activate, set  `output_backend = "pulse"` in  in the general section of the configuration. You must still enter its settings via the command line, after the `--` as before. Note that stuffing or stripping is done: if the PulseAudio sink runs slower or faster, you'll eventually get buffer overflow or underflow.
  * New backend-specific settings are provided for setting the size of the backend's buffer and for adding or removing a fixed offset to the overall latency.