thing.rs

    let mut pitch_detector = Arc::new(Mutex::new(
        Pitch::new(
            PitchMode::Yinfft,
            16384,
            client.buffer_size().try_into().unwrap(),
            client.sample_rate().try_into().unwrap(),
        )
        .expect("Failed to initialize pitch detector"),
    ));

    let process_callback = move |client: &jack::Client, ps: &jack::ProcessScope| {
        println!("Got {} frames!", ps.n_frames());

        let audio_input = input_port.as_slice(ps);
        let mut detector = pitch_detector.lock().unwrap();

        println!("Freq: {}", detector.do_result(audio_input).unwrap_or(0.0));

        jack::Control::Continue
    };

    let process = jack::ClosureProcessHandler::new(process_callback);