Minor additions/corrections to CHANGELOG and README

CHANGELOG.txt

@@ -1,4 +1,7 @@
 /* CHANGELOG FOR PORTMIDI
+ *
+ * 23May22 Roger Dannenberg
+ * - fix for Apple Arm (M1) cpus
  *
  * 21Feb22 v2.0.3 Roger Dannenberg
  * - this version allows multiple hardware devices to have the same name.
@@ -14,6 +17,10 @@
  * - Fix for unicode endpoints on macOS CoreMIDI.
  * - Parsing in macOS of realtime message embedded in short messages
  *   (can this actually happen?)
+ * - Support higher data rates using macOS CoreMIDI. Note that
+ *   CoreMIDI will drop messages to non-hardware (e.g. IAC bus) when
+ *   data rate is too high, so PortMIDI throttles data to a safe rate,
+ *   but data to hardware, e.g. USB, is no longer throttled.
  * - renamed pm_test/test.c to pm_test/testio.c
  * - with this release, pm_java, pm_csharp, pm_cl, pm_python, pm_qt
  *   are marked as "legacy code" and README.txt's refer to other

README.md

@@ -9,10 +9,20 @@ for related code and bindings (although currently, not much is here).
 
 ## Compiling and Using PortMidi
 
-Use CMake (or ccmake) to create a Makefile for Linux/BSD or a 
+
+Use CMake (or ccmake) to create a Makefile for Linux/BSD or a
 project file for Xcode or MS Visual Studio. Use make or an IDE to compile:
+
+On Linux, you need ALSA.
+
+Ubuntu / Debian:
+`sudo apt install libasound2-dev`
+
+Fedora / Red Hat / CentOS:
+`sudo dnf install alsa-lib-devel`
+
+All:
 ```
-sudo apt install libasound2-dev  # on Linux, you need ALSA
 cd portmidi  # start in the top-level portmidi directory
 ccmake .     # set any options interactively, type c to configure
              # type g to generate a Makefile or IDE project
@@ -45,9 +55,9 @@ bindings for these and other languages:
 - Python: Various libraries and packages exist; search and ye shall
   find. If you wouldn't like to do research, check out [mido](https://mido.readthedocs.io/en/stable/)
 - [SML](https://github.com/jh-midi/portmidi-sml2)
-- [OCaml](https://ocaml.org/p/portmidi/0.1) 
+- [OCaml](https://ocaml.org/p/portmidi/0.1)
 - [Haskell](https://hackage.haskell.org/package/PortMidi)
-- [Erlang](https://hexdocs.pm/portmidi/PortMidi.html) 
+- [Erlang](https://hexdocs.pm/portmidi/PortMidi.html)
 - [Julia](https://github.com/SteffenPL/PortMidi.jl)
 - [C#](https://github.com/net-core-audio/portmidi)
 - [Rust](https://musitdev.github.io/portmidi-rs/)
@@ -80,6 +90,8 @@ sndio is also minimally supported, allowing basic PortMidi functions
 in OpenBSD, FreeBSD, and NetBSD by setting USE_SNDIO for CMake, but
 not delayed/timestamped output and virtual devices.
 
+See CHANGELOG.txt for more details.
+
 # Other Repositories
 
 PortMidi used to be part of the PortMedia suite, but this repo has