Macbook Pro- Audio at half speed, help!

[ra4oasis]

I work at a University, and a Professor has a 15 inch 2015 Macbook Pro, and sometimes when he shows a PowerPoint or YouTube video on a projector, through an HDMI cable, the audio sounds slowed down, almost like it is at half speed. We're at a loss. We've tried multiple other laptops in the different classrooms, and can't reproduce the problem. When the Professor plugged his laptop in via HDMI to his TV, apparently it worked fine (I didn't see this, but I trust him). None of my Google searches are turning anything up. We've reset his SMC and NVRAM, but to no avail. Any ideas?

 

[fisherking]

check the sample rates of the files (ie 44.1, or 48); and look in Utilities for the Audio/Midi Setup app, make sure that shows the same rate when outputting audio thru the hdmi cable... (am just guessing it has something to do with mismatched rates)....

 

[snaky69]

I work at a University, and a Professor has a 15 inch 2015 Macbook Pro, and sometimes when he shows a PowerPoint or YouTube video on a projector, through an HDMI cable, the audio sounds slowed down, almost like it is at half speed. We're at a loss. We've tried multiple other laptops in the different classrooms, and can't reproduce the problem. When the Professor plugged his laptop in via HDMI to his TV, apparently it worked fine (I didn't see this, but I trust him). None of my Google searches are turning anything up. We've reset his SMC and NVRAM, but to no avail. Any ideas?

The sample rate would make everything slow like that. Check MIDI setup.

 

[ra4oasis]

The sample rate would make everything slow like that. Check MIDI setup.

Sorry guys, but how do we check the MIDI setup?

 

[Barry01]

Sorry guys, but how do we check the MIDI setup?

Retread post 2

 

[snaky69]

Sorry guys, but how do we check the MIDI setup?

Cmd + space, brings up spotlight, type in MIDI, it'll be the first hit.