I am using the Teensy Audio Adapter for both inputs and outputs on a test fixture.

The Teensy 3.2 is also switching an array of LEDs (bar graph display) powered by the 3.3V output on the Teensy 3.2

This seems to be adding clicks and noise to the audio out.

How much PSRR does the audio have?

Would it be better to buffer the LEDs and power them from the raw supply (5V)?