Chapter 5: Recording/Playback

High-pass filter setting

The PD606 is equipped with the high-pass filter circuit. The cutoff frequency can be adjusted within the range between 50 Hz and 300 Hz, while the filter slope can be selected between -6 dB/oct. and -12 dB/oct.

The filter is useful to eliminate the wind noise during location recording or unnecessary low frequency noise when recording voice or sound. You can make filter setting for each channel individually.

LINE

 

MIC

LINE

 

MIC

LINE

 

MIC

LINE

 

MIC

LINE

 

MIC

LINE

 

MIC

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

INPUT

 

48V

DM

T12

48V

DM

T12

48V

DM

T12

48V

DM

T12

48V

DM

T12

48V

DM

T12

SEL

 

 

 

130

 

200

130

 

200

130

 

200

130

 

200

130

 

200

130

 

200

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(Hz)

 

50

 

300

50

 

300

50

 

300

50

 

300

50

 

300

50

 

300

HPF

[HPF] controls

-12

-6

OFF

-12

-6

OFF

-12

-6

OFF

-12

-6

OFF

-12

-6

OFF

-12

-6

OFF

 

and switches

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(dB/oct)

Limiter setting

By using the limiter when recording microphone sound, the signal level is prevented from exceeding a certain level. In result, the signal level fluctuation is suppressed. By default, the threshold of the PD606 limiter is set to -12 dB under the 24-bit full-scale level (all bits are ON) and the compressed ratio is set to 1:5. The limiter attack time is fixed to 5 ms, while the release time is fixed to 200 ms. You can set limiter parameters using the "Limiter parameter" menu item in the "SYS SETUP" menu of the MENU mode (see page 159 for details).

<Note>: When you use the limiter function, see also "Gain adjustment" on the next page.

To activate/deactivate the limiter function, press the [SHIFT] key, followed by the [READY] key of the desired channel (from channels 1 through 6 and the stereo bus channels). When the limiter function is active, the [LIM.] indicator of the corresponding input channel is lit. When the limiter is actually working, the [LIM.] indicator flashes quickly.

CH1~CH6 [READY] key

ST BUS [READY] key

SHIFT

[LIM.] indicator of the Stereo bus channels

[LIM.] indicator of each

channel (1 through 6)

80

Location Recorder Model PD606

Page 80
Image 80
Fostex PD606 owner manual High-pass filter setting, Limiter setting