Audio Equipment

MiniDisc (HiMD)

Exciting news on the portable recording scene since January 2004 is the Hi-MD. The Hi-MD is nearly a complete revamping of the original MiniDisc system. Several significant changes include the Hi-MD media (a new 1.0GB disc), and the ability to record in a linear PCM (un-compressed data) format. These both are important factors for individuals recording natural sounds. No longer are we constrained by the ATRAC coding algorithm (although it is still an available recording format choice). Additionally, the 1.0GB disc capacity can yield an impressive 1-hour/34 minutes of stereo recording time. Using Sony's new improved ATRAC 3plus coding @256kbp/s will render 7-hours/55 minutes of recording time per disc.

As with all new technologies, machine choices are very limited. The Sony MZ-NH900 (~$300) is a small Walkman-style machine. Microphone and headphone connections utilize 3.5mm stereo mini-jacks. Digital record level is provided as well as a small, but useful backlit display for metering. Anti-skip "G" memory buffer is also employed. A USB port is on-board for off-loading digital audio files directly to a Windows based computer. The caveat is that only audio files that were originally recorded via the analog microphone or line inputs can be digitally transferred via the USB port. Audio captured via the digital inputs cannot. Field powering is accomplished via NiMH rechargeable or standard alkaline AA style batteries.