Update LIBSOXR.md

diff --git a/LIBSOXR.md b/LIBSOXR.md
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@@ -1,7 +1,7 @@
 
 The Raspbian image at the time of writing is the `May 2016` version, with the release date of `2016-05-10`. It does not include `libsoxr`, but it is available as a package via `apt-get`.
 
-Alternatively, `libsoxr` is very easy to compile. Here are very brief instructions to download, compile and install it:
+Alternatively, `libsoxr`, part of [The Sox Resampler Library](https://sourceforge.net/projects/soxr/), is very easy to compile. Here are very brief instructions to download, compile and install it:
 
 * Install `cmake`. This is used in the building of libsoxr. On Linuxes such as Debian/Ubuntu/Raspbian:
 ```
@@ -21,7 +21,7 @@ $ git clone git://git.code.sf.net/p/soxr/code soxr-code
 $ cd soxr-code
 $ ./go
 ```
-Be patient! This takes a long time on a Raspberry Pi -- it looks like it gets stuck around 40% or 50%, but it will finish if you let it.
+Be patient! This takes a long time on a first-generation Raspberry Pi -- it looks like it gets stuck around 40% or 50%, but it will finish if you let it.
 
 Having compiled `libsoxr`, it must now must be installed:
 ```