Infuse for Apple TV supports up to 7.1 channels of 24-bit, 48KHz audio.
Audio Output Settings
Audio settings on the Apple TV can be adjusted in two places. Through Infuse > Settings and through Apple TV > Settings Audio and Video.
- Auto (recommended): Audio will be sent as uncompressed, multi-channel LPCM (up to 7.1 channels and 24-bit). Additional output adjustments can be made through the Apple TV > Settings > Audio and Video menu.
- Passthrough: Audio will be sent as Dolby or DTS (up to 5.1 channels and 16-bit). Note: The 'Reduce Loud Sounds' option in Apple TV > Settings > Audio and Video MUST be disabled. *Due to an Apple bug in tvOS 11.3+ passthrough is not currently available.
- Best Quality Available (recommended): Audio will be sent as uncompressed, multi-channel LPCM (up to 7.1 channels and 24-bit)
- Dolby Digital: Audio will be sent as Dolby Digital (up to 5.1 channels and 16-bit)
- Stereo: Audio will be sent as stereo (2.0)
What are Dolby (AC3) and DTS?
Dolby (AC3) and DTS are compressed audio formats that allow high-quality, multi-channel audio to be stored in a relatively small amount of space.
What are Dolby TrueHD and DTS-HD MA?
Dolby TrueHD and DTS-HD MA are lossless audio formats that provide greater depth and dynamic range when compared to normal Dolby (AC3) and DTS audio.
What is LPCM?
LPCM is an uncompressed, lossless format which on the Apple TV supports up to 7.1 channels of 24-bit, 48KHz audio.
My movies have Dolby or DTS audio - which settings should I use?
Keeping Infuse set to Auto, and the Apple TV set to Best Quality Available is recommended. This will provide the highest possible audio quality, and will adjust automatically to a wide array of audio system types.
Why isn't my receiver recognizing the audio as Dolby or DTS when Infuse is set to Auto?
Since Dolby and DTS are both compressed formats, Infuse will first decompress this audio before sending it to your receiver as LPCM (some receivers will display this as PCM, or Multi-Channel).
Am I losing any quality by using LPCM?
No. Since LPCM is a lossless format, using it will result in no loss of quality. What your ears hear will be exactly the same. The only difference is your receiver will recognize the audio stream as PCM instead of Dolby/DTS.
What about Dolby Atmos and DTS-X?
Unfortunately, the Apple TV does not currently support these formats. Infuse will send the lossless audio to your receiver, but will not include the special metadata that is required for some features.
Update: Apple announced Atmos support will be available in Fall 2018, and we are looking into adding this into Infuse.
Are higher sample rates (96KHz, 192KHz, etc...) supported?
Not at this time. Though virtually all Dolby and DTS audio tracks (including TrueHD and DTS-HD MA) are encoded at 48KHz, which is supported.
Are multi-channel AAC and FLAC supported?
Yes! Infuse will pass these formats as multi-channel LPCM.
Surround sound settings on your Apple TV
Dolby Audio support on Apple TV