0:00:16 > 0:00:21I think Opus 25 was a tougher task for Chopin, because he'd already done the first set,
0:00:21 > 0:00:25so he must have had something more that he wanted to say.
0:00:28 > 0:00:35I don't find them as difficult as Opus 10, and certainly not as difficult to run through in one go.
0:00:36 > 0:00:41I think you could say there's slightly more music to it.
0:00:41 > 0:00:45I guess it's more of a question of the sound that you're producing.
0:00:45 > 0:00:48It's not watching your fingers and working at them,
0:00:48 > 0:00:52but it's a lot to do with the sound effect that you can create.
0:00:52 > 0:00:58No. 1, there you're playing lots of notes,
0:00:58 > 0:01:01but you want it to sound almost like a choir.
0:01:01 > 0:01:07You want to hear a very beautiful melody being played,
0:01:07 > 0:01:10a barbican of shimmering sound coming out from the piano.
0:01:10 > 0:01:16That's more where the difficulty lies, rather than just getting through the notes.
0:01:19 > 0:01:21MUSIC: "Opus 25, No. 1"
0:04:16 > 0:04:18Subtitles by Red Bee Media Ltd
0:04:18 > 0:04:20E-mail subtitling@bbc.co.uk
0:04:24 > 0:04:26Utopia - the better place.
0:04:26 > 0:04:28Somewhere between fiction and reality.
0:04:28 > 0:04:30The idea has exerted
0:04:30 > 0:04:33such a hold over us, but why?
0:04:34 > 0:04:35Join me, Richard Clay,