Compare editions before changing the receiver
In a first-party response to a question about Blu-ray-style quality, the AKIBA PASS moderator says the platform does not offer 5.1 surround and supplies stereo. The same response describes purchase downloads as MP4 files. A title also being sold on a disc with a different soundtrack is not evidence that the streaming transaction includes that disc’s audio format.
Use the source track to explain the display
Suppose an AV receiver shows a two-channel input while a film’s Blu-ray page advertises multichannel sound. First confirm which product is actually playing. If it is the AKIBA PASS stream described by the moderator, replacing the HDMI cable cannot create a multichannel source track absent from that edition. The receiver may offer its own processing modes, but those should not be labelled proof that the publisher supplied a native surround mix.
Keep purchase downloads and rentals distinct
The reply permits downloads after a purchase, not after a rental. The platform FAQ separately describes adaptive streaming and selectable download resolutions. Neither the container name MP4 nor a high picture resolution tells you that the audio matches a Blu-ray soundtrack. For a title-specific question, ask the publisher about that edition and quote its current technical description. We have not purchased a file, inspected its metadata or measured any audio output; the distinction follows the publisher’s stated offer.