Roland VM-C7200 Owner's Manual download pdf (Page 234)

233

Glossary

Chapter 13 Appendices

Band pass filter (BPF)

A filter that allows only a specific frequency band to pass.

Bass cut filter

A filter that cuts unwanted low-frequency sounds. It can be used

to eliminate the “pop noise” that occurs when wind or breath is

blown into a mic at close range. This simulates the bass cut switch

that is found on some mics.

Blank parameter chart

A sheet of paper used to write down parameter settings. It

contains the parameter names in an organized layout, with blank

areas in which to write the value of each setting.

➔ Parameter

BPM, beats per minute

The number of beats in one minute (usually quarter note).

Bulk dump

The action of transmitting internal settings of a device as MIDI

data using system exclusive messages. This allows internal

settings to be transmitted to another device, or saved on a

sequencer or computer.

Bus

A signal route within a mixer that is shared by signals from two

or more channels. This system provides a Main bus which collects

the signals that are output from the main output, a Cue bus that

is used mainly to collect signals for monitoring, and twelve Flex

buses that can be used for a variety of purposes.

➔ Flex bus

Cascade connection

Connecting a second identical unit to increase the number of

input channels, effect processors, etc. On this system, a VM-24C

(cascade kit: sold separately) can be used to connect two

processors and double the number of inputs in the entire system.

In general, connecting the output of a device directly to the input

of another device is referred to as a “cascade connection.”

Channel link

A function that allows adjacent odd and even-numbered channels

(1 and 2, 13 and 14 etc.) to be joined as a pair. It is convenient to turn

this on for channels that control a stereo signal, since you can avoid

having to manually make the same settings for both channels.

Channel message

A collective term for all MIDI messages that are used to transmit

musical performance data for specific channels. They include

messages such as note-on/off, control change, pitch bend, and

aftertouch. This system uses channel messages to modify fader

settings, to display the level meters, and to sound a metronome.

➔ MIDI

Checksum

Data included within a MIDI system exclusive message that

allows the receiving device to check whether the message was

received correctly. The checksum is a hexadecimal number that is

calculated from the values of the addresses or data (or size) using

a prescribed formula, and is attached to the end of each exclusive

message (immediately before F7H: End Of Exclusive). For details

on calculating the checksum, refer to the MIDI implementation.

➔ System exclusive message

Chorus

An effect that adds spaciousness to the sound. It is produced by

adding a slightly time-delayed signal to the input sound, and then

cyclically modulating the delay time to create a sense of expanded

space or of multiple sound sources.

Clear

Automix data is stored temporarily in internal memory. “Clear”

will erase all of this internal memory.

Coaxial

A digital audio connector to which a coaxial cable can be

connected. Of the digital inputs and outputs of this system, S/

PDIF format “DIGITAL A” uses a coaxial connector. In contrast,

S/PDIF digital I/O jacks to which an optical cable can be

connected are referred to as “optical.”

➔ S/PDIF

➔ Digital I/O connector

➔ Optical

Comb filter

A frequency filter with a response curve shaped like a comb. A

filter that has a dip at regular frequency intervals (e.g., 50 Hz, 100

Hz, 150 Hz, 200 Hz,...). This is used to emphasize specific

harmonic series in a way similar to a flanger, or to remove noise

(such as power supply hum) that occurs at frequency intervals of

a specific harmonic series.

On this system, the Feedback Delay function can be used to add

a very short delay sound to the original sound, thus producing a

comb filter. By mixing this delayed sound in inverse phase with

the original signal, a filter will be produced that has peaks at each

dip point. When the delay time is set to t (msec), the frequencies

(f1, f2, f3,...fn) at which the dips will occur can be calculated by the

formula fn = 500 n/t. For example, if the delay is 10 msec, there

will be dips at 50 Hz, 100 Hz, 150 Hz, 200 Hz, 250 Hz.., while if the

delay is 1 msec, the dips will occur at 500 Hz, 1 kHz, 1.5 kHz, 2.5

kHz...

Comment

On this system, refers to the text data (memo) that can be stored

for each project. A maximum of 32 characters can be stored.

Compressor

An effect that suppresses volume fluctuations. When the input

signal exceeds a specified level (threshold), the gain is reduced as

the input signal rises, thus suppressing signal overload. The same

algorithm can also be used as a limiter (an effect that

instantaneously suppresses peaks).

Of the effects in this system, only the compressor included in

guitar multis 1–3 simulates a compact compressor for guitar, and

works differently from a limiter. (It suppresses signal overloads,

and also evens out the volume by raising low-level signals.)

Compu-mix

Another term for auto-mix, although Compu-mix often refers to

automation via a MIDI sequencer.

➔ Automix

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Roland VM-C7200 Owner's Manual Page 234

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