Werbung
Verfügbare Sprachen
Verfügbare Sprachen
PB LEVEL controls
These controls adjust the playback signal level at the LINE OUT
and HEADPHONES
jacks.
The adjusted level is indicated on the
VU meters, with a O VU reading corresponding to 0.435 V output,
which appears when the control is halfway up (with the indicator
at "5").
Full clockwise rotation of the PB LEVEL
control beyond
midpoint will provide a 5 dB boost, and full counterclockwise rota-
tion will bring the volume down to zero.
Generally, set these con-
trols at center position.
The usages are as follows.
During record monitoring, the setting of these controls at center
position provides nearly equal
levels on both SOURCE
and TAPE
positions of the MONITOR switch.
During playback, adjust the tape deck.to
match other sources:.
If
the tape deck
playback
level
differs from
that of other sources
connected to the amplifier, such as a tuner, record player etc., the
sound may become suddenly louder or softer when
the amplifier
input selector is switched back and forth between tape and some
other source.
During duplication on another tape deck, adjust these controls so
that the sound is not distorted.
Recording a new material while the tape is in motion
This tape deck may directly go from play to record while the tape
is in motion.
1. Perform the necessary steps for recording.
2. Depress the REC MODE
switches.
The @ button blinks.
3. Depress the ® button and listen to the playback sound.
4, At the point where new material is to be recorded, depress
the
@ and » buttons simultaneously.
The @ button illumination changes to a steady red light.
At this moment, recording begins.
Recording level adjustment
Tape saturation levels differ between the types of tape.
Recording level should be adjusted according to the tape to be
used in order to utilize it to the utmost permissible
level.
This is
the knack not only for deriving the possible characteristics from
the tape but also assuring good recording result.
High recording
level is recommended
to reduce
annoying tape
noise, but overloaded
and distorted tape could result if the level
is too high.
When
using a Sony SLH tape, for example:
Adjust the recording level so that the needles of the VU meters
swing around the O VU reading and sometimes
swing within red
zone.
Continuous
deflection
within red zone will lead to distor-
tion. On the other hand, as for TC-766-2, when recording at 38
cm/s (15 ips), staying of the needies within red zone is still tolera-
ble, so make the needles swing
around
+3 VU and even go over
the scale for an
instance
at the sudden
high
level burst, as the
dynamic range becomes wider than that of 19 cm/s (7 1/2 ips).
=10 .
=
+
oe,
oe oe
3
3
0
+3
ae
;
en oe oe
,
i
Too low level
Too high level
Proper level
Proper level at
(S/N ratio will
(Sound will be
38cm/s
with
be poor.)
distorted.)
TC-766-2
But be cautious with
peaks of short duration
out of a relatively
low recording level ; as the needles of the VU meters cannot follow
them because of their inertia, they will show levels much
smatler
than the actual levels (up to 12 or 14 dB).
Recording of FM broadcasts or discs is relatively simple because
broadcast stations and disc companies
use standardized limiters
to reduce the dynamic range of the original sound source.
More care has to be taken in case of live recordings.
The dynamic
range is undiminished by any limiter, and
a small movement
may
change the distance between sound source and microphone,
thus
changing
the signal
level even when
repeating an identical pas-
sage.
Above all consideration
has to be given to the fact that tape
saturation
and
distortion
at higher
frequencies
occur
at lower
levels, which
may be especially troublesome
in case of piano re-
cordings, etc. To make things even more complicated, microphone
amplifiers may overload.
Using the MIC ATT switch is an effective
method.
In any way, having acquired a little bit of experience, you
will be quite successful.
Do not change the recording
level once the recording starts, as
this will easily be audible
during
playback,
especially when the
stereo balance is changed.
If adjustment becomes necessary, it is
advisable to wait until a break or a pause between movements oc-
curs or a soloist has finished his turn.
Werbung
