New specialty cable products that solve interface problems with todays Canon, Nikon, Pentax and Panasonic DSLR setups. Many professional DSLR cameras have unbalanced stereo mic level audio inputs on a mini TRS 3.5mm jack. Manufacturers do this to save valuable space in the camera interface.
With the age of professional pocket recorders that can produce very high quality sound, such as the the Sony PCMD50 or a Samson Zoom H4N, came devices that output different line level audio signals. This cable