use correct audio backend apis

src/NoteQueue.cpp

@@ -11,8 +11,6 @@ bool NoteQueue::push(const NoteEvent& event) {
     buffer_[head] = event;
     head_.store(next, std::memory_order_relaxed);
 
-    std::cout << "Notequeue::push: " << std::chrono::duration_cast<std::chrono::microseconds>(std::chrono::high_resolution_clock::now() - event.timestamp) << std::endl;
-
     return true;
 }
 
@@ -24,7 +22,5 @@ bool NoteQueue::pop(NoteEvent& event) {
     event = buffer_[tail];
     tail_.store((tail + 1) % SIZE, std::memory_order_release);
 
-    std::cout << "Notequeue::pop: " << std::chrono::duration_cast<std::chrono::microseconds>(std::chrono::high_resolution_clock::now() - event.timestamp) << std::endl;
-
     return true;
 }