I've read a lot of topics about the app desync audio after rendering, i've noticed this when the video needs a negative time correction (you may notice a second of stop in the video before the appearance of midi notes when you do so). In order to solve this, i export audio and midi, not video, open with VLC, slow down the video and see how much frames the audio is far from where it should be (at 30fps every frame is 0,033 seconds). A bit long as a work, but you can render at minimum quality in order to speed up, correct the audio with the necessary delay or subtraction and then export the correct full video at full quality.
Hope this help everybody!
is that meaning export use 30fps frame rate is better than the 60?
what is the different between 30 and 60 frame rate?
No here i just used the frame as a reference for the audio/video delay, i used seconds on frame to calculate how much i had to move the video in order to match with the audio. About 30/60 fps it changes the level of details of your final video but i'm no expert about that...