use rodio's cpal, use microphone device instead of default, only show supported files in the list, and Linux works now when ran with the included script and Discord set to use the virtual_mic source.

src/main.rs

@@ -11,7 +11,7 @@ use bevy_egui::{
     EguiContextSettings, EguiContexts, EguiPlugin, EguiPrimaryContextPass, EguiStartupSet, egui,
 };
 
-use rodio::{Decoder, OutputStream, OutputStreamBuilder, Sink, mixer::Mixer};
+use rodio::{Decoder, OutputStream, OutputStreamBuilder, Sink, mixer::Mixer, cpal, cpal::traits::{HostTrait, DeviceTrait}};
 
 #[derive(Serialize, Deserialize)]
 struct JSONData {
@@ -39,8 +39,15 @@ struct AppState {
 
 use std::time::{SystemTime, UNIX_EPOCH};
 
+const ALLOWED_FILE_EXTENSIONS: [&str; 4] = ["mp3", "wav", "flac", "ogg"];
+
 fn main() {
-    let stream_handle = OutputStreamBuilder::open_default_stream().expect("Unable to open default audio device");
+    let host = cpal::default_host();
+    let virtual_mic = host.default_output_device().expect("Could not get default output device");
+
+    println!("Using device: {}", virtual_mic.name().unwrap_or_default());
+
+    let stream_handle = OutputStreamBuilder::from_device(virtual_mic).expect("Unable to open default audio device").open_stream().expect("Failed to open stream");
     let mixer = stream_handle.mixer();
     let sink = Sink::connect_new(&mixer);
 
@@ -111,7 +118,7 @@ fn load_data(app_state: &mut AppState) {
                         .filter_map(|entry| {
                             entry.ok().and_then(|e| {
                                 let path = e.path();
-                                if path.is_file() {
+                                if path.is_file() && ALLOWED_FILE_EXTENSIONS.contains(&path.extension().expect("Could not find extension").to_str().expect("Could not convert extension to string")) {
                                     path.to_str().map(|s| s.to_string())
                                 } else {
                                     None