okay, flattened device

might join app + device + engine again?

device/device_type.rs

@@ -0,0 +1,11 @@
+use crate::*;
+
+pub type MidiData = Vec<Vec<MidiMessage>>;
+
+pub type ClipPool = Vec<Arc<RwLock<MidiClip>>>;
+
+pub type CollectedMidiInput<'a> = Vec<Vec<(u32, Result<LiveEvent<'a>, MidiError>)>>;
+
+pub type SceneWith<'a, T> = (usize, &'a Scene, usize, usize, T);
+
+pub type MidiSample = (Option<u7>, Arc<RwLock<crate::Sample>>);