use crate::*;
impl<E: Engine> Audio for Arranger<E> {
    fn process (&mut self, client: &Client, scope: &ProcessScope) -> Control {
        if let Some(ref transport) = self.transport {
            transport.write().unwrap().process(client, scope);
        }
        for track in self.arrangement.tracks.iter_mut() {
            track.player.process(client, scope);
        }
        Control::Continue
    }
}