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Setting the recording level
Music recordings sound especially lively if the dynamic
range is wide. The dynamic range is the difference in
level between the very quiet and the very loud passages.
For this reason the recording level must be adjusted so
that the loudest passages are within the dynamic range
of the tape material, otherwise the result will be
distortion.
On the other hand the recording level must not be set too
low, otherwise tape hiss will be obtrusive in very quiet
passages.
The CC 820 M can display the peak input level on the
screen, and you can alter it over a range of
40 increments (0 ... 39).
After selecting the Recording Level process the display
shows the current level (0 ... 39) in place of the digital
tape counter.
You can now set the record level using the
and
buttons, continuing to make adjustments until the
peak display on the VU meter only exceeds the 0 dB
mark now and then.
Once you have set the optimum recording level, press
the
button briefly again to call up the Balance
process.
Note:
The optimum recording level will vary slightly depending
on the programme source and the tape material. If you
are not sure, make a test recording before recording the
whole work.
Balance adjustment
The volume of the left and right record channels can be
set to different values to compensate for unequal input
signal levels.
The CC 820 M provides a means of showing the average
input level values on the screen, so that you can balance
them out at different volume.
Call up the manual balance process; in place of the
digital tape counter the display now shows the current
balance setting:
'
L+nn
L+nnL+nn
L+nn
'
The stereo centre is offset to the left by
'nn' steps.
'
BAL
BALBAL
BAL
'
The stereo centre is at neutral.
'
R+nn
R+nnR+nn
R+nn
'
The stereo centre is offset to the right by
'nn' steps.
The channels can be set to the same level on the VU
meter using the
and
buttons while the
balance display is on the screen.
After you have set the channels to equal levels, press
the
button again briefly to call up the 'Manual
Bias Correction' process.
Manual BIAS correction
The automatic calibrator adjusts the tape deck to the
optimum value for tape bias, matching the type of tape in
the machine.
If the music source is deficient in high frequencies, the
CC 820 M allows you to adjust the high frequency range
to suit your individual preference. This is done by making
a manual adjustment to the bias setting.
Select the Manual Bias Correction process, and the
display will show the current bias setting as a numerical
value between '
BIAS
BIASBIAS
BIAS -7
-7 -7
-7
' and '
BIAS
BIASBIAS
BIAS +8
+8 +8
+8
'. While the bias
display is on the screen you can alter the setting using
the
and
buttons.
After you have set the bias to the desired value you can
press the
button again briefly to switch back to
"record ready" mode.
Notes:
The smaller the selected value, the lower the bias
current, which equates to a higher proportion of high-
frequency signal for the recording.
If you encounter distortion on playback you should
increase the value again.
Before you alter the bias setting please be sure to note
the bias value which the tape calibrator has chosen. This
allows you to reset it if the recording results are worse
after you have made a change.