User Manual
Select Symphony in your DAW 
Most professional applications have their own audio preferences that are separate from the Mac System Preferences. 
Basic steps for setting up Symphony are provided. For more detail on this topic, refer to the documentation that 
comes with your recording program. 
Select Symphony in Logic Pro X 
1.
Go to Logic Pro X > Preferences > Audio. 
2.
In the Devices Tab, select Symphony I/O 
Thunderbolt in the Output and Input Device drop-
down boxes. 
3.
Start by setting the I/O Buffer Size to “64 Samples”. 
This setting may need to be adjusted based on 
your computer’s performance. 
4.
Select “Apply Changes” and close the Preferences 
window. 
Select Symphony in Pro Tools 
1.
Go to Setup > Playback Engine. 
2.
In the Playback Engine drop-down box, select 
“Symphony Thunderbolt”. 
3.
Start by setting the H/W Buffer Size to “64 Samples”. 
This setting may need to be adjusted based on 
your computer’s performance. 
4.
Select OK. 
SYMPHONY I/O MK II - USER’S GUIDE Page 15










