Smart Home voice control works in the app or through a linked smart speaker
Where your Roku Smart Home device supports voice commands, you have two routes: voice-enabled features inside the Roku Smart Home App itself, or a compatible smart home speaker such as Amazon Alexa or Google Home, linked to your Roku devices through the Roku skill installed from the Alexa or Google Home apps. Both routes are conditioned on the device supporting voice commands, and the speaker route additionally requires installing the Roku skill in the assistant's own app.
Details
Condition
Roku Smart Home device supports voice commands
What it covers
in-app voice features or a linked smart-home speaker
Supporting quotations
If your Roku Smart Home device supports voice commands, you can use (1) voice-enabled features available when using the Roku Smart Home App; or (2) a compatible smart home speaker (e.g., Amazon Alexa or Google Home) linked to your Roku devices via the Roku skill that can be installed from the Alexa or Google Home apps, respectively.
Qualifications & exceptions
Both routes require that your Roku Smart Home device supports voice commands.
The speaker route depends on linking through the Roku skill installed from the Alexa or Google Home apps.
Linking lets an assistant control certain Roku devices by voice
Linking Roku devices to Amazon Alexa or Google Home lets you control certain Roku devices by voice. The document's examples are accessing and viewing video content from a Roku camera on a Roku TV, turning lights on and off, powering sound devices, and adjusting in-home climate or security settings, followed by "and more" — so the list is illustrative rather than complete. The capability is stated for "certain Roku devices", not for every device you own.
Details
What it covers
camera video on a Roku TV, lights, sound devices, climate or security settings and more
Supporting quotations
By linking Roku devices to Amazon Alexa or Google Home, you will be able to control certain Roku devices with Alexa or Google Home voice commands (e.g., access and view video content from a Roku camera on a Roku TV, turn lights on/off, power sound devices, adjust in-home climate or security settings, and more).
Qualifications & exceptions
Applies to "certain Roku devices", not necessarily all of them.
The listed actions are examples followed by "and more".
Not stated here
Which devices are controllable through a linked assistant is not enumerated.
Linking & Identification · Restriction or exception
Auto-linking reaches every current and future compatible Roku device
If you auto-link your devices to a virtual assistant such as Google Home or Amazon Alexa, the document states that ALL current and future Roku devices that are compatible will be linked to that assistant. The effect is forward-looking: a compatible device you add later is linked without a fresh decision, and the scope is set by whether a device is compatible rather than by which devices you selected.
Details
What it covers
all current and future compatible Roku devices
When
current and future devices
Supporting quotations
Note that when you auto-link your devices to a virtual assistant such as Google Home or Amazon Alexa, ALL current and future Roku devices that are compatible will be linked to the virtual assistant.
Qualifications & exceptions
The link covers "ALL current and future Roku devices that are compatible", not only devices owned at the time of linking.
The stated trigger is auto-linking; the document does not say how an auto-link differs from any other link.
"Compatible" limits the devices reached, and this source does not define compatibility.
Not stated here
What distinguishes auto-linking from other linking flows is not described here.
Linking & Identification · Restriction or exception
De-linking removes every Roku device from the assistant at once
De-linking is all-or-nothing: if you de-link your Roku devices, all Roku devices will be de-linked. The document does not describe a way to de-link a single device while leaving others linked.
Details
What it covers
all Roku devices
Supporting quotations
If you de-link your Roku devices, all Roku devices will be de-linked.
Qualifications & exceptions
The stated result is that "all Roku devices will be de-linked", with no partial option described.
Not stated here
No per-device de-linking path is described in this document.