update README

README.md

@@ -17,6 +17,8 @@ Tested in
   - Cockos Reaper
   - Propellerhead Reason 10
 
+# Add-on modules
+
 The following add-on modules are statically linked with the VST plugin:
  - AS.ADSR
  - AS.AtNuVrTr
@@ -271,8 +273,42 @@ The following add-on modules are statically linked with the VST plugin:
 Please notice that the Audible/Mutable Instruments modules appear under a different name in the UI.
 For example, "Clouds" is listed as "Texture Synthesizer".
 
+# How to build
+
+Prerequisites:
+- Microsoft Visual Studio C++ compiler toolchain
+- Steinberg VST2.4 SDK
+
+$ git clone https://github.com/bsp2/VeeSeeVSTRack.git
+$ cd VeeSeeVSTRack/
+<unpack dep/dep.7z>
+(contains the source codes and MSVC-precompiled libraries)
+
+Edit dep/yac/install_msvc.mk and adjust the LIB_INSTALL_PREFIX, WINDDK_PATH, VCTK, W32API_INC, W32API_LIB as required.
+
+$ alias m="make -j 20 makefile.msvc"
+$ m lib
+$ cd plugins
+$ m bin
+$ cd ..
+
+Edit vst2_common_msvc_pre.mk and adjust the VST2 SDK path
+
+$ m bin
+
+If the build succeeded, the effect and instrument plugin DLLs can now be found in the vst2_bin/ folder.
+
+Last but not least, please don't ask me for the VST2 SDK.
+It is not permitted to redistribute it and Steinberg has discontinued it.
+I heard that the aeffect.h / aeffectx.h files are still included in the VST3.
+
+
+# VCV Rack
+
 For more info about VCV rack, see https://vcvrack.com/
 
+# Support
+
 Keep in mind that this is NOT AN OFFICIAL VCV RACK RELEASE.
 Please DO NOT contact the VCV Rack team if you need any support.
 You may get some support at https://www.kvraudio.com/forum/viewtopic.php?f=23&t=507216