Slowed down playback without an interface

[Micahtime]

Hey all,

I have been using Pro Tools 2020.3.0 with my Macbook Pro, running Mojave (10.14.6) through an Apogee Duet 2. I am now away from home and when I opened my session with no interface, the audio plays back slower than it should. When I first opened the session and switched to Built In Output for the playback engine, I got a message saying this output's clock does not support a 48khz sample rate.

Questions:
1. Will the audio play back normally when I plug in my Duet again?
2. Is there a way to use PT without an interface and NOT have the audio playback slower than it should, even though my session is at 48Khz?

THANKS!

[Darryl Ramm]

You likely have some other app or the OS locking the driver at some other clock rate. Fix that and the problem will be solved. the session is not affected.

[ChuckS]

Try using the PT aggregate device that combines the onboard input and output rather than just selecting the output as the device.