Portable digital recorders have undergone ever increasing changes in their technological development over the last years. Excellent sounding, easy to use, mobile, pocket size recorders are offered in abundance today. A wide selection of applications covering, band practice, songwriting, lectures, seminars or interviews makes them an indispensable companion. Market leaders such as Zoom, Tascam or Edirol inspire thousands of users with their well thought out menu guidance, smart miking as well as the many other practical high-quality characteristics. A further advantage also being the wide-spread storage media range, for example SD or Compact Flash cards.