Building the MS Windows portaudio DLL with ASIO Support ======================================================= Some MAP65 users may not be able to use WDM/KS hosted audio devices due to sharing issues with other applications, to circumvent this they can build a version of the portaudio DLL with ASIO support. We cannot provide a portaudio DLL with ASIO support as the Steinberg ASIO SDK license prevents redistribution of drivers or hosting applications without a commercial license agreement, nor is the Steinberg ASIO SDK license compatible with the GPL v3 license that MAP65 is released under. Users may build a portaudio DLL themselves, strictly for personal use, under the terms of the Steinberg ASIO license. Building portaudio on MS Windows is done most easily using the MinGW (GNU) tool-chain which can be installed on MS Windows using the MSYS2 unix like environment which in turn includes a package manager (pacman) that allows simple installation of necessary prerequisite packages like the MinGW 64-bit tool-chain. To install MSYS2 download the latest 64-bit installer from the MSYS2 project web site. This page contains links to the installer download and detailed instructions to install and bring up-to-date the base MSYS2 packages. https://www.msys2.org/wiki/MSYS2-installation/ Take particular care to restart the MSYS2 shell window when directed to. Once MSYS2 is installed you will find a start menu entry labelled "MSYS2 MinGW 64-bit", use that to start a fresh MSYS2 shell window for the rest of these instructions. The first step is to install some prerequisite packages which contain the tools needed to prepare and build the portaudio DLL. Execute the following command to do that: pacman -S make diffutils unzip mingw-w64-x86_64-gcc sed tar curl Then make directories to put downloaded sources in and for building: mkdir -p ~/src ~/build/portaudio Fetch and unpack the Steinberg ASIO SDK (note the ASIO SDK license document included, particularly that it strictly disallows redistribution of the DLL we will be building here), and portaudio sources: curl -Lo ~/src/asiosdk.zip https://www.steinberg.net/asiosdk (cd ~/src ; unzip asiosdk.zip) curl -O --output-dir ~/src \ http://files.portaudio.com/archives/pa_stable_v190700_20210406.tgz tar -C ~/src -xf ~/src/pa_stable_v190700_20210406.tgz Patch and build the portaudio library: sed -i -e 's/-luuid//g' ~/src/portaudio/configure cd ~/build/portaudio ~/src/portaudio/configure --with-winapi=wmme,directx,wdmks,asio \ --with-asiodir=$HOME/src/asiosdk_2.3.3_2019-06-14 \ --disable-static --enable-shared make -j You can check the library build is working by running a test program that was also built: bin/pa_devs which should list every audio device on your system by every host API, if all is well that should include the audio devices on your system with ASIO drivers. Copy the new portaudio DLL to your WSJT-X/MAP65 installation directory: cp lib/.libs/libportaudio-2.dll /c/WSJT/wsjtx/bin/ Note that if you upgrade WSJT-X you will need to copy this DLL again since it will be overwritten by one with no ASIO support.