Passthrough sends a supported encoded audio signal onward for another product to decode. Check the player, source, television and receiver before enabling it. Compare a documented compatible mode if sound disappears, keeping the programme and track unchanged. Passthrough is not a universal upgrade and cannot make a receiver decode formats it does not support. Record the selected track and connection path, because one programme’s result may not describe a differently encoded track.
Why it matters
Intermediate products can handle audio differently. A clear format record makes intermittent sound reports more useful than saying surround sometimes works. It also separates an equipment configuration from unverified claims about the service’s catalogue of advanced audio formats.
Work through the steps
- List the path from player to speakers.
- Check each product’s supported formats.
- Compare one documented mode with the same track.
- Record sound, layout and synchronisation.
What to avoid
Do not enable passthrough everywhere without checking the destination. Avoid confusing receiver effects with the source’s actual channel format. A compatible fallback restoring sound is a diagnostic result, not proof of broader catalogue support.
The useful takeaway
Choose a mode supported along the entire path. Precise track and connection information explains silent or inconsistent sound better than assuming the most impressive audio label is always preferable.
Sources & further reading
professionalsupport.dolby.com · s/article/Endpoint-Device-Testing-for-Streaming-Services
References describe the device or technology. They do not establish Hot IPTV content availability. This guide is based on documentation; it is not a hands-on service test.
Keep reading
Published 29 October 2026 · Hot IPTV editorial team · How we write and update guides