• AD/DA-Converter
    Analog-digital/digital-analog converter. Converts analog signals to digital signals and back. The electrical oscillation is sampled in short intervals and every value is converted to a number. The more steps you are using to convert your value, the better is the quality.

  • AHI
    Amiga Hardware Interface. Device-independent driver system for AMIGA audio hardware. Is used by many AMIGA soundtools.

  • ASIC
    Application Specific Integrated circuit. Integrated Circuit especially designed for one purpose. Normally it includes a many functions.

  • Codec
    Coding/decoding unit. See AD/DA-Converter

  • DAT
    Digital Audio Tape: a magnetic tape to store digital audio data. DAT was the first digital recording system and was released 1987. It works similar to video tapes. DAT is primarily used in studios.

  • Dolby Digital AC-3
    Surround sound system developed by the Dolby Laboratories . It's able to transmit up to five audio channels an one sub bass channel. Mainly used in cinemas and on DVD. It's based on the human auditory sensation in order to filter out inaudible sounds from the signal. This reduces the amount of data to be transmitted or stored.

  • DTS
    Digital Theater System by Steven Spielberg. Digital surround sound system used for cinema and DVD. First used within the movie "Jurassic Park". Like Dolby AC-3 used to reduce the amount of data.

  • DVD
    Digital Versatile Disc. It looks like a CD, but holds more data and it's mainly designed for digital video. More than 18 GB of data can be stored on a DVD, which can be video, music, computer data or interactive games in great picture and sound quality.

  • EUR
    Euro. In a little insignificantly region on earth it's used as means to simplify the ware-money-transactions.

  • FIFO
    First-In-First-Out data buffer. Data which are written first are read first.

  • Enhanced full duplex mode
    Mode to record and play audio data at the same time. In opposite to "full duplex mode" the "enhanced full duplex mode" allows to select a different sample frequency for record and playback.

  • MPEG
    Motion Picture Experts Group is a sub group of International Standardization Organization / International Electrotechnical Commission (ISO/ IEC). A family of standards for coding audio-visual information (video, music) in a digitally compressed form. These standards was developed by the members of ISO/IEC. One of them is the MP3 (MPEG-2 layer 3) format which is used for stereo sound. The REPULSE soundcard can also handle MPEG-2 multichannel, which is used for up to 7 channels plus sub-bass channel.

  • Optical cable
    A cable that is capable of transmitting data like a normal cable. It is less susceptible for disturbing noise than a normal cable. In that way quality is much better and it's perfect for computer's audio transmission.

  • PCB
    Printed Circuit Board. Carries the integrated circuits and connects them.

  • PCM
    Pulse Code Modulation. A non-compressed method of coding audio signals. It is used for audio-CD's.

  • Sample frequency
    The analog signal is periodically transferred into digital signals. This frequency of transfers per second is called sample frequency or sample rate. Common sample rates are 44.1 kHz for audio-CD's, and 32 khz or 48 kHz for DAT.

  • Sample resolution
    Determines the number steps used by the codec to transfer analog to digital signals. The standard AMIGA sound uses 8 bit, CD uses 16 bit. For professional purposes 24 and more bits are used.

  • S/P-DIF
    Sony/Philips DIFferential. It was used first with professional equipment to transfer digital audio data. With special operation the PCM data and additional information like copyright or quality will be coded into a serial bit stream. The transfer can be done using coaxial or optical cable. The S/P-DIF standard allows to transfer compressed data like Dolby Digital AC-3, MPEG-2 multichannel or DTS.

  • Toccata
    One of the first soundcards for the AMIGA. Developed and produced by the MacroSystems GmbH .

  • waitstate
    Sometimes while accessing the Zorro Bus the components are not able to transmit data immediately. In that case the processor has to wait for the response. This is called wait state. As a result of this the data transfer and the processor speed is recognizably slowed down.

  • Zorro II
    Standard for the AMIGA 2/3/4000 expansion cards. For A500/1200 there are expansion kits which are offering Zorro II slots.

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