The company, a joint venture between Channel 4 and Bauer Media, currently runs seven music channels, six of which are extensions to existing Bauer Media radio and magazine brands.
Viewers who want to watch The Box, Heat, Kiss, Kerrang, Magic, Smash Hits and 4Music are now able to visit the respective channel's website to watch the stations live, following a deal with Simplestream - incidentally one of the partners in Synapse TV, which is currently testing on Freeview and being showcased at this week's Connected TV Summit in London.
On Freeview, a new Connect TV portal has launched for viewers with the latest broadband connected Freeview HD-spec receivers, to be accessed via the red button on 4Music, channel 18. Magic, Kiss and Kerrang TV are available via the portal, which uses the same technology behind other streamed channels already on the platform, including CCTV and Sports Tonight on channels 226 and 227.
In April, Box TV made the move from pay TV to free TV by unencrypting its services on satellite and making them available on Freesat. There is insufficient capacity on Freeview to allow Box TV to deliver extra channels the traditional way via the terrestrial transmitter network. Transmitter company Arqiva's Connect TV platform works around this problem by enabling viewers to receive additional channels on the Freeview EPG via portals linked to the internet. The internet option is also considerably cheaper for broadcasters.
Q&A: Magic, Kiss and Kerrang as Freeview "streamed channels"
When will they launch?
update: since this article was first uploaded, the new red button service for the extra channels on channel 18 has launched. For those without a compatible receiver (see next question) all services are now streaming online via the respective websites of the channels. Terms and conditions relating to the new Box TV media player, plus tech spec for online streaming are available here (external link).
Can my Freeview box/TV get the new channels?
If you are able to watch CCTV on channel 226 and Sports Tonight on channel 227, then it is likely that you will be able to watch Magic, Kiss and Kerrang via the new portal, accessed via 4Music. There isn't an official list of receivers that are compatible yet. Add your comment below to share your experiences of getting the service. (Google account required - e.g. G+ or Gmail)
Why won't my receiver work on these channels?
Only newer (most 2012 and all 2013 onward models) Freeview HD-spec receivers were designed with broadband connectivity [with] such services in mind.
update: this means that the latest Freeview HD models can launch the portal and connect to the stream on the internet. Older Freeview HD models may be able to access the internet, but weren't designed to link to the internet via such services as the 4Music red button.
Does this mean the channels will be in HD?
No. The only reason why Freeview HD compatible receivers are required is that the newer HD models have to conform to additional connectivity beyond just enabling reception of HD TV channels. The latest Freeview HD receivers also have to be able to connect to the internet and be able to handle "MHEG-IC", a version of the technology used to deliver digital text and red button content, but for portals to internet content.
How come these extra channels are available via 4Music?
4 Music is part of the Box TV group of channels, run in association with Channel 4. Connect TV, which provides other streamed services on Freeview, now offers broadcasters the option to add an internet portal to be accessed via the red button to their existing Freeview channels. Not to be confused with the previous 4Music red button service, which was left over from when the channel was called "The Hits" and offered ringtones for sale alongside a channel toggle function, linking to other Bauer Media (ex-EMAP) stations on Freeview.
Are these channels free?
Yes. However, you'll need to pay for a suitable internet connection (usually more than 2Mbps) for such services to work.
Minor update 23:45