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MP has the capability to record two or more channels that reside in the same MUX, and use only a single tuner. I would guess that when you scheduled four concurrent recordings, two were on channels in one MUX, and the other two were on channels in a second MUX. So MP needed to use only two tuners. To see all four tuners being used, you need to schedule concurrent recordings on channels in four different MUXes. The following web page lists channels and MUXes for UK Freeview; click on the heading for the "MUX" column to get the channels sorted by MUX:

Digital UK | Channel listings

As a test, try recording these channels (MUX name in parenthesis):
BBC1 (BBC A), Pick (ARQ A), Yesterday (ARQ B), ITV1 (D3&4)

In my first HTPC, I had two Hauppauge Nova TD500 Dual Tuner PCI cards, but I could not get them to work properly. There is some question whether two of these cards in the same HTPC is supported by the Hauppauge driver. If you schedule concurrent recordings for the channels I have suggested above, but you still only get two to record, this (alleged) driver limitation may be the reason.

-- from CyberSimian in the UK

<blockquote data-quote="CyberSimian" data-source="post: 1245815" data-attributes="member: 141969">MP has the capability to record two or more channels that reside in the same MUX, and use only a single tuner.&nbsp; I would guess that when you scheduled four concurrent recordings, two were on channels in one MUX, and the other two were on channels in a second MUX.&nbsp; So MP needed to use only two tuners.&nbsp; To see all four tuners being used, you need to schedule concurrent recordings on channels in four different MUXes.&nbsp; The following web page lists channels and MUXes for UK Freeview; click on the heading for the &quot;MUX&quot; column to get the channels sorted by MUX:<a href="http://www.digitaluk.co.uk/channels/channel_listings" target="_blank">Digital UK | Channel listings</a>As a test, try recording these channels (MUX name in parenthesis):BBC1 (BBC A), Pick (ARQ A), Yesterday (ARQ B), ITV1 (D3&amp;4)In my first HTPC, I had two Hauppauge Nova TD500 Dual Tuner PCI cards, but I could not get them to work properly.&nbsp; There is some question whether two of these cards in the same HTPC is supported by the Hauppauge driver.&nbsp; If you schedule concurrent recordings for the channels I have suggested above, but you still only get two to record, this (alleged) driver limitation may be the reason.-- from CyberSimian in the UK</blockquote>

[QUOTE="CyberSimian, post: 1245815, member: 141969"] MP has the capability to record [b]two or more[/b] channels that reside in the same MUX, and use only a [b]single tuner[/b]. I would guess that when you scheduled four concurrent recordings, two were on channels in one MUX, and the other two were on channels in a second MUX. So MP needed to use only two tuners. To see all four tuners being used, you need to schedule concurrent recordings on channels in four different MUXes. The following web page lists channels and MUXes for UK Freeview; click on the heading for the "MUX" column to get the channels sorted by MUX: [URL="http://www.digitaluk.co.uk/channels/channel_listings"]Digital UK | Channel listings[/URL] As a test, try recording these channels (MUX name in parenthesis): BBC1 (BBC A), Pick (ARQ A), Yesterday (ARQ B), ITV1 (D3&4) In my first HTPC, I had two Hauppauge Nova TD500 Dual Tuner PCI cards, but I could not get them to work properly. There is some question whether two of these cards in the same HTPC is supported by the Hauppauge driver. If you schedule concurrent recordings for the channels I have suggested above, but you still only get two to record, this (alleged) driver limitation may be the reason. -- from CyberSimian in the UK [/QUOTE]