All good! 
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Our near 20 year old Roberts kitchen radio can pause & rewind live DAB radio for up to about 15 mins depending on the station’s bit rate. BBC radio @ 128 Kbs gives around 9 minutes which is usually enough for most domestic interruptions. As it’s seamless I’d presume the audio is always coming from the buffer with just the amount of buffer being the variable. Maybe Naim have considered this approach but discarded it on sound quality grounds.
Older Sky boxes could record up to 59 minutes of the current channel but only as far back as the point where the channel was first selected, so you can’t flick over and then go back. The box uses a separate area of the HDD for this. Sky Q is different but essentially the same principle.
Hi @spile
We have considered the feature in the past, as on the new streamers we have a huge emmc flash chip that can hold gigabytes of data. There is a legal technically - in some countries time shifting a broadcast that is licenced to be played live only and make it an “on demand” goes against broadcasters licencing and equipment manufacturers should respect the correct playback model of the streams provided (aka a live stream should stay live).
Tune-in used to have this feature, but had to remove it due to the above. Some old Frontier Silicon based radio solutions also did this, but nowadays the legal teams have caught up on such things and dished out necessary slaps on the wrists.
As discussed in this thread, the BBC app juggles live broadcast and ondemand on the fly, so it appears that the app is timeshifting, when in fact it’s all done on the backend broadcast system and the BBC are suitably licenced to do it.
Best regards
Steve Harris
Software Director
Naim Audio Ltd.
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Thank you Steve.
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