* 18-week like-for-like sales down 1.8 pct
* Growth in UK/Ireland offset by weak international mkts
* Buys 50 pct stake in 7digital for 7.7 mln stg
* Shares fall 1.6 pct, underperforming UK midcap stocks
(Adds CEO, analyst comments, shares, detail, background)
By Mark Potter
LONDON, Sept 3 (Reuters) - British music, books and games
retailer HMV Group Plc
Chief Executive Simon Fox also played down media speculation
he might leave the firm to head broadcaster ITV
"I'm completely committed to staying with HMV," he told reporters on Thursday.
HMV, which runs music, DVD and video games shops under its own name as well as Waterstone's bookstores, said sales at shops open over a year fell 1.8 percent in the 18 weeks to Aug. 29.
Like-for-like sales in the UK and Ireland rose 1.7 percent, helped by big market share gains following the demise of rivals Woolworths and Zavvi around the end of last year.
However, this was offset by weak sales of video games, a 3.4 percent drop in like-for-like sales at Waterstone's and a 12.6 percent decline in underlying sales in international markets.
Fox said trading conditions were tough, but was upbeat about prospects for the coming months, helped by recent price cuts in games consoles, new books from Jamie Oliver and Dan Brown and the release of remastered albums by The Beatles.
Nomura analysts kept their full-year profit forecast of 74.7 million pounds ($121.9 million), with a 2 million cut to their international estimate offset by an upgrade for the UK.
Altium's David Stoddart, however, was concerned the performance in the UK might not make up for the weakness abroad and at Waterstone's.
At 0840 GMT, HMV shares were down 1.6 percent at 112.9 pence, lagging a small rise on the FTSE midcap index <.FTMC>.
DIGITAL
HMV, which faces the same competition from supermarkets, online retailers and digital downloading that led to the demise of Woolworths and Zavvi, has responded by cutting costs and widening its focus.
It has entered the live music and ticketing markets, is
trialling digital cinemas in partnership with Curzon and selling
mobile phones in a deal with France Telecom's
The firm said on Thursday it was buying a 50 percent stake in digital media firm 7digital for 7.7 million pounds ($12.6 million) in cash.
The deal will give it access to industry-leading technology, a catalogue of over 6 million digital music tracks and boost its position in the digital books market, it said.
"We believe this has the potential to put HMV's digital content on the front foot for a change, rather than playing catch-up to market developments," said KBC Peel Hunt analyst John Stevenson.
Fox said HMV planned to tackle weakness in its international markets -- Canada, Hong Kong and Singapore -- by broadening its product offering as it has done in the UK by, for example, selling more computer games. ($1=.6128 pounds) (Editing by Will Waterman and Elaine Hardcastle)