HDMI - 'Helicopter' noise from Uniti & Mu-so 2

Symptoms:

• HDMI input making choppy/ ticking/ helicopter-like sound.
• Netflix or other smart TV apps are creating these sounds but normal TV isn't.

FIX:

• Go into TV settings
• Find the audio output settings
• Change the output codec to PCM or LPCM or Stereo (it is likely on auto)

• The names of these settings and the path to get there will likely be slightly different.

Explanation:

When using a smart TV a user can choose to watch Netflix or other external applications through there TV.

Unlike standard digital TV channels, some of these applications produce a digital stream that our Mu-so 2 and Uniti products cannot decode and play-out properly.

In this instance, you can get a choppy/ ticking/ helicopter-like sound as the processor tries to decode the signal wrongly.

Naim product ARC support:

• PCM
• DSD

For Naim products:

• The compressed audio needs to be downmixed into a format the product understands by the TV. Instructions for this under FIX.