In the past I have played in a number of bands, on and off, as I was much more busy with being a mathematician. Primarily I used my own songs if I had the chance, and I composed some 300 songs all together since the seventies. Many of the earlier ones I wrote together with Richard van Bemmelen, with whom I also recorded many demos on an 8-track. The last decade I have been going solo, sometimes accompanied by Leo van Dorp, a flautist. I have decided to issue my first official CD in April 2006, the month in which I will turn fifty (shit). The CD's name therefore will be "Herbie's 50th blues", and a number of musicians will participate in its creation. Next months will be loaded with a lot of serious studio work. There will be a piece of Bach on church organ with fuzz guitar, a Schubert song and the other 14-ish will be my own.