Sound Devices 552 - Manual (Page 35)

552 User Guide and Technical Information
31
Headphone Monitoring
Headphone Gain
Headphone output level is controlled using the front panel Headphone Controller. While turning
the Headphone Controller, the headphone gain level is temporarily displayed on the Right Output
Meter.
The 552 can drive headphones to dangerously high volumes. Turn down the headphone gain
before selecting a headphone source to prevent accidental signal extremes.
Headphone Source Selection
L
R
M
ST
MS ST
REC Source
The Headphone Selector sets the audio source sent to headphones. The selections available are listed
below:
HP Position Description
ST Stereo - Left program to left headphone monitor and Right program to right headphone monitor.
M Mono - summed Left and Right program sent to both headphone monitors.
L Left - Left program sent to both headphone monitors.
R Right - Right program sent to both headphone monitors.
MS ST Mid-Side Stereo - decoded MS stereo to headphones, this is not used if the inputs are already linked
as an MS pair.
REC Source Recorder Source - audio program sent to the recorder, this is identical to AES A routing. .
Headphone Tones
Record Start and Stop Tones
The start of a recording is indicated audibly by a single 440 Hz tone sent to headphones. When re-
cording is stopped two 220 Hz tones are sent to the headphones.
Playback Navigation Tones
A single 220 Hz tone followed by an announcement of the time the file was created is sent to the
headphones when a file is selected for playback using the Record Controller.
PFL (Channel Solo Monitor)
PFL (pre-fade listen) allows the user to quickly monitor the selected input’s signal pre-fader, post-
trim, post-high-pass, and post-limiter. Slide the PFL switch left to activate, and again to deactivate.
For momentary action, hold the switch left for one second or longer.