In
digital systems the basic calibration tone is a 1 kHz tone set to the -10
to -14 VU range. This, of course, assumes that the
mixer and digital recorder have been adjusted so their levels agree (any
discrepancey or offset can be noted). This tone can be used to reset levels
and balance for subsequent sessions. |
It
may be useful to record several tones of different
frequency, 100 Hz, 1kHz, and 10kHz for instance, which can be used to adjust
and balance playback. Analogue tapes for optical film transfer may also
require pink noise as well. It
may also useful to include a short sample of the loudest material as well. |
In
either digital or analogue systems, clear labels on the media and the media
case are essential:
Name, contact information,
(digital)
sample rate, content,
timings,
(analogue)
noise reduction (if
any) tape type, content, timings, wind direction (reel to reel), tones
for calibration of eq/bias (optional) |
In
analogue systems the basic calibration tone is a 1 kHz tone at 0 VU.
This, of course, assumes that the mixer and analogue recorder have been
adjusted so their levels agree (any discrepancey or offset can be noted).
This tone can be used to reset levels and balance for subsequent sessions. |
Several
tones of different frequency, 100 Hz, 1kHz, and 10kHz
for instance, can be recorded at 0 VU and used to adjust and balance playback
EQ. |
A 15
kHz tone at 0 VU can be recorded to allow azimuth
alignment of the recorders heads. |