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Ground loop. A type of interference in audio equipment that is grounded in
more then one location, often through cables or connections, that can be
the source of hum interference due to small currents that exists between
the two pieces of equipment. Ground loop eliminator devices can prevent
this type hum. All equipment should be grounded for safe operation.
Hertz (Hz). The unit of measure of frequency. 1 hertz equals one cycle per
second. 1KHz equals 1000 cycles per second. (K in the metric system is
short for Kilo or 1000.)
Highpass filter. See filter.
I/O. An abbreviation for Input/Output.
initialize. To reset or bring to to some predetermined condition.
K. The abbreviation of kilo in the metric system meanining 1000. See Hertz.
LED Light Emitting Diode. The DA7 uses various color LED’s as visual
indicators in the buttons and the signal level meters for ease of use, long
life and reliability.
level. A general term used to describe the audio signals strength, voltage,
power or volume.
line level signal. The level of signal used by most audio equipment. Line
level is -20db to +20db. In audio, it is known as a high-level signal.
loop. A sound that is played repeatedly. On the DA7, a software command
that instructs a process to repeat.
Lowpass filter. See filter.
Low level signal. A signal that is less then -20dB is considered a low level
signal. The output of microphones are generally low level. Generally, low
level signals are more suceptable to hum and noise.
master. A device that controls all other devices. A master gain control
controls the overall level of all the other contols under it.
metering. The DA7 metering is precise and easy to read. LED signal
indicators for inputs, outputs, bus and special effects monitoring.
MIDI. Musical Instrument Digital Interface. The musical instrument
standard that allows MIDI capable devices to communicate with each
other. The DA7 can communicate with and control other MIDI devices.
Glossary
DA7 Users’ Guide
Glossary
Glossary-6