diff --git a/README.md b/README.md
index 8a3ea7d..54ea176 100644
--- a/README.md
+++ b/README.md
@@ -9,45 +9,24 @@ bliss analysis. This is then intended to be used by [Bliss Mixer](https://github
 
 This application can be built in 4 variants:
 
-1. Using command-line `ffmpeg` to decode files.
-2. Using `libavcodec`, etc, to decode files.
-3. Using `libavcodec`, etc, to decode files, but statically linked to `libavcodec`, etc.
-24. Using `symphonia` to decode files.
+1. Using `libavcodec`, etc, to decode files.
+2. Using `libavcodec`, etc, to decode files, but statically linked to `libavcodec`, etc.
+3. Using `symphonia` to decode files.
+4. Using command-line `ffmpeg` to decode files.
 
 
-`libavcodec` is the fastest (about 70% faster than `ffmpeg` commandline, and about
-3 times faster than `symphonia`), but might have issues with library, versioning, etc.,
-unless these libraries are statically linked in.
+`libavcodec` is the fastest (~15% faster than `symphonia`, ~50% faster than `ffmpeg`
+commandline), but might have issues with library, versioning, etc., unless these
+libraries are statically linked in. `libavcodec` statically linked may reduce supported
+file formats, but is more portable.
 
-`libavcodec` statically linked may reduce supported file formats.
+`symphonia` also produces a more portable application, is only slightly slower to decode
+files, but has more limited codec support, and does not produce identical analysis results.
+Therefore, it is not advisable to mix files analysed with `ffmpeg` (any variant) and
+`symphonia`.
 
-`ffmpeg` whilst slower then `libavcodec` produces a more portable application.
-
-`symphonia` also produced a more portable application, but is slightly slower to decode
-files, and does not produce identical analysis results. Therefore, it is not advisable
-to mix files analysed with `ffmpeg` (any variant) and `symphonia`.
-
-
-## Build for 'ffmpeg' command-line usage
-
-`clang` and `pkg-config` are required to build, as well as
-[Rust](https://www.rust-lang.org/tools/install)
-
-To install dependencies on a Debian system:
-
-```
-apt install -y clang pkg-config
-```
-
-To install dependencies on a Fedora system:
-```
-dnf install clang pkg-config
-```
-
-Build with `cargo build --release --features=ffmpeg`
-
-`ffmpeg` is then a run-time dependency, and should be installed on any system where this application
-is to be run - it should also be in the users `$PATH`
+Command-line `ffmpeg` whilst being the slowest, produces a more portable application, and
+supports a wider range of codecs.
 
 
 ## Build for 'libavcodec' library usage
@@ -118,6 +97,30 @@ dnf install clang pkg-config
 Build with `cargo build --release --features=symphonia`
 
 
+
+## Build for 'ffmpeg' command-line usage
+
+`clang` and `pkg-config` are required to build, as well as
+[Rust](https://www.rust-lang.org/tools/install)
+
+To install dependencies on a Debian system:
+
+```
+apt install -y clang pkg-config
+```
+
+To install dependencies on a Fedora system:
+```
+dnf install clang pkg-config
+```
+
+Build with `cargo build --release --features=ffmpeg`
+
+`ffmpeg` is then a run-time dependency, and should be installed on any system where this application
+is to be run - it should also be in the users `$PATH`
+
+
+
 # Usage
 
 Please refer to `UserGuide.md` for details of how this tool may be used.
diff --git a/UserGuide.md b/UserGuide.md
index c854538..12ce412 100644
--- a/UserGuide.md
+++ b/UserGuide.md
@@ -27,23 +27,24 @@ with the `ffmpeg` libraries - but these have been statically linked. This
 allows faster decoding of files, and a more portable binary - however, this
 _may_ reduce the number of supported file formats.
 
-If the package used ended with `-ffmpeg`, then `bliss-analyser` requires you
-also have the `ffmpeg` application installed and in your `$PATH`. These
-builds are roughly 46% slower at analysis, but are more portable as they can
-use any `ffmpeg` version.
-
 If the package used ended with `-symphonia` then `bliss-analyser` has been built
 with the `symphonia` libraries. This allows a more portable binary, but at a
 slightly slower decoding speed (than `libav`) and produces analysis results that
 are not the same as those produced by `ffmpeg`/`libav`.
 
+If the package used ended with `-ffmpeg`, then `bliss-analyser` requires you
+also have the `ffmpeg` application installed and in your `$PATH`. These
+builds are roughly 50% slower at analysis, but are more portable as they can
+use (alomost) any `ffmpeg` version.
+
 
 Quick guide
 ===========
 
 1. Install the `Bliss Mixer` LMS plugin.
 
-2. Install ffmpeg if using Linux or macOS.
+2. Install `ffmpeg` if using Linux or macOS (and using `-libav` or `-ffmpeg`
+package (see `Varaints` (above))).
 
 3. Edit the supplied `config.ini` in the current folder to set appropriate values
 for `music` and `lms` - e.g.:
@@ -73,8 +74,10 @@ Installation
 ============
 
 For Windows no extra installation steps are required, as all dependencies are
-bundled within its ZIP file. However, both the Linux and macOS versions require
-that `ffmpeg` be installed.
+bundled within its ZIP file. However, if using a `-libav` or `-ffmpeg` package (see
+`Varaints` (above)), both the Linux and macOS versions require that `ffmpeg` be
+installed - if using a `-static` or `-symphinia` package, then no additional
+dependencies are used.
 
 
 Linux