For those who are not already familiar with the playing of Vikingur Ólafsson and perhaps more especially for those who are, I very strongly recommend his current series of radio programmes, which not only gives a very clear and illuminating description of his musical interests, but also an indication of the differences between those who believe in a presumed authenticity of interpretation and those like Olafsson who advocate a much freer use, adaptation and transcription of the original score, particularly Bach:-