Roland M-1000 Owner's Manual download pdf (Page 17)

Explanations

SRC

Normally, when transmitting digital audio signals between devices, including

digital sources sent to digital mixers, the sampling frequencies (SAMPLING FREQ)

of each device must be the same. If the different devices use differing rates, they

must be converted to the same master rate. In addition, the clocking or timing of the

clock signals of each signals of each signal must be exactly the same. This is usually

achieved by having one master clock and then slaving each digital device to that one

Master or Word Clock.

With the M-1000, each digital input 1--4 features its own sample rate converter

(SRC). This allows you to use devices that are set to different digital clock rates and

also that are not synchronized with each other by use of a master Word Clock. Each

input in the M-1000 is able to receive the following rates.

DIGITAL INPUT 1: Rate can be set to any frequency from 32 kHz to 96 kHz

DIGITAL INPUT 2--4: Rate can be set to 32 kHz, 44.1 kHz, 48 kHz, 88.2 kHz,

or 96 kHz

The appropriate sample rate conversion is performed internally in the M-1000 and

the signals are all synchronized to the master clock signal according to the clock

source and sample frequency settings on the M-1000. This conversion and clock

synchronization is done automatically, making it very easy to mix multiple digital

devices.

SCMS

→“About SCMS” (p. 20)

Other Points

Input Sensitivity Select Switch (SENS) and LEVEL Knobs

The input sensitivity select switch adjusts the input gain.

If the input volume level is set too low when converting an analog signal to digital,

the conversion accuracy suffers. Setting the input volume too high ends up

distorting the sound. Ideally, the input level prior to conversion should be as high as

possible without causing distortion. First, try a high input level with the input

sensitivity select switch set to [-10 dB]. If the PEAK indicator does not light, then use

the signal as is. If the PEAK indicator does light, it means the sound is going to be

distorted, so slide the switch to [+4 dB].

The LEVEL knobs work like channel faders on a digital recorder or similar device.

These adjust the volume level for each input. These affect the signals after they are

digitally converted.

MASTER Output and MONITOR Output

Both of these channel contain the mixed output of the M-1000. Normally, the

MASTER output is connected to house speakers or recording devices, and the

MONITOR output is connected to headphones or monitor speakers.

Although the output to the MONITOR bus is the same as the MASTER output,

changing the MONITOR output volume does not affect the volume of the MASTER

output.

SRC:

Sample Rate Converter

SCMS:

Serial Copy Management

System

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Roland M-1000 Owner's Manual Page 17

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