Hi-MD was developed by Sony and is the next generation MD storage. It provides the user with more capacity, high quality, high speed and more applicability.

Indicates if it's possible to record MP3s with the MD player.

The playing time indicates how long the batteries will last during continuous playing.

Shows if there is a radio in-built.

An AC adapter is necessary if you wish to power your player directly from a wall socket. This is a useful feature if you wish to save your batteries for when you're roaming.

The long-term cost is lower with good rechargeable batteries. This option avoids the expense of having to regularly buy AAA batteries, the non-rechargeable standard.

The remote control means that you can control the player without having to take the unit from your pocket or belt.

Specifies whether your MD-player can record from other audio sources (such as CD players, cassette decks etc).

ATRAC (Adaptive TRansform Acoustic Coding) divides the 16 bit 44.1 KHz digital signal into 52 sub-bands in the frequency domain (after a Fast Fourier Transform). The sub-bands in the low frequencies are finer than the ones in the high frequency range. A psycho-acoustic transfer function that takes advantage of the masking effect and the absolute hearing threshold then removes enough information to reduce the data stream to 1/5th of the original size. Each channel receives that treatment separately (the Sony MZ-1 portable MD recorder features one ATRAC encoder/decoder chip per channel). PASC (Precision Adaptive Sub-band Coding -- used in Philips now defunct DCC [Digital Compact Cassette]) divides the digital signal into equally spaced sub-bands and removes less information (to only 1/4th of the original size). PASC is essentially the MPEG Layer 1 audio standard (can be decompressed with MPEG Layer 1 players after a trivial preprocessing step).

Ovn volumen målt i liter. 1 liter=10x10x10 cm