Roland OP-R09HR-C Using Auto Gain Control (AGC)

Chapter

1Situation practical

use technique

Chapter

3 Applied technique

Chapter

4 Appendix

Practical

Guide to the

edirol r-09hr

The outstanding

features of the R-09HR

Setting

sound quality

Since the purpose of recording a meeting is to

be able to hear what is being said, there is no

strict requirement for good sound quality. More

importantly, the recording will often be for an

extended time, so MP3 is probably the best

format.

MP3 is recommended

for extended recordings

If you need to record for a longer time, set the

bit rate to 64 kpbs. Although this level of com-

pression will degrade the quality, it’s suﬃ cient

for recording conversations during meetings.

See p. 38-39 in the Owner’s Manual for setting

the recording mode.

☞

Playback Feature can

also be used for transcribing

You can change the R-09HR playback speed by

pressing the SPEED button during playback. So

you can slow down playback when the lecturer

speaks too quickly to understand.

You can also use the AB repeat buttons during

playback to de ne a section to play over several

times.

The R-09HR can become a valuable assistant for

transcription if you freely use the “slow playback”

and “repeat playback” features.

See p. 64 in the Owner’s Manual about setting

playback speeds.

See p. 56 in the Owner’s Manual about using

the AB repeat buttons.

☞

Using Auto Gain Control (AGC)

The AGC automatically changes the recording level according to the volume of the sound being

recorded. You may think that this convenient feature should be left on all the time.

However, there are times when using AGC is not

appropriate. This is especially the case when you’re

trying to capture the true nature of a sound.

For example, if you record a piano recital with AGC on,

you would lose all the inﬂ ection and dynamism of the

piano because the sound would be recorded at the

same volume throughout. Also, the recording level is

constantly being increased and decreased, giving the

recording a less natural sound.

For meetings and lectures, it’s best to keep the volume

even so that you can capture what’s being said. This is

when the AGC feature can be best put to use.

Turning AGC on causes

the recording level

to be automatically

adjusted

Point

3Point

R-09HR_guide_e1.indd 17 07.12.27 11:30:59 AM