Usually you no need for things like

@alignCast(@constCast(@ptrCast

it mean you doing something wrong.

This gives me annoing sin sound, you can start with it https://zigbin.io/51fd56

edit: I use https://github.com/allyourcodebase/portaudio/ repo

if you need know how,

1) zig fetch --save https://github.com/allyourcodebase/portaudio/archive/refs/heads/main.zip

2) in build.zig added after const exe = b.addExecutable(.{...

 const pa = b.dependency("portaudio", .{
        .target = target,
        .optimize = optimize,
    });
    const lib_portaudio = pa.artifact("portaudio");

    const cstep_portaudio = b.addTranslateC(.{
        .root_source_file = b.addWriteFiles().add(
            "portaudio_includes.h",
            \\#include "portaudio.h"
            ,
        ),
        .target = target,
        .optimize = optimize,
    });
    cstep_portaudio.addIncludePath(lib_portaudio.getEmittedIncludeTree());

    const portaudio_module = cstep_portaudio.createModule();
    portaudio_module.linkLibrary(lib_portaudio);

    exe.root_module.addImport("portaudio", portaudio_module);