Kanye West is reportedly close to withdrawing his support for the music streaming service Tidal.

The Jay Z-led service was launched amid much publicity at a star-studded event in March, but Kanye - who's currently working on his new album 'Swish' - is considering releasing his record via rival firm Apple.

A source told The Sun newspaper: ''Apple are trying everything to get him on board for the launch of their new streaming service in the coming days.

''He's always had a close relationship with Apple and considers Steve Jobs one of his biggest influences.''

The speculation comes shortly after Jay Z came out in defence of Tidal, saying it's been the victim of a ''smear campaign''.

He tweeted: ''There are many big companies that are spending millions on a smear campaign. We are not anti-anyone, we are pro-artist & fan. We made Tidal for fans. We have more than just music. We have video, exclusive concerts, tickets for events early, live sports! (sic)''

Later, he added: ''Tidal pays 75 per cent royalty rate to ALL artists, writers and producers - not just the founding members on stage.

''Indie artists who want to work directly w/us keep 100 per cent of their music.''

''The iTunes Store wasn't built in a day It took Spotify nine years to be successful. (sic)''