To Override The Speech/Music Detector - Orban OPTIMOD-FM 8500S Operating Manual

OPTIMOD-FM DIGITAL
mode turns look-ahead on for speech material and off for music, using an automatic
speech/music detector. Switching is seamless and click-free because we change the
delay in the compressor control sidechains; this is not a way to reduce the 8500S's
throughput delay.
Choices are L
OOKAHEAD
Speech is detected if (1) the input is mono, and (2) there are syllabic
pauses at least once every 1.5 seconds. Speech with a stereo music back-
ground will usually be detected as "music," or the detector may switch
back and forth randomly if the stereo content is right at the stereo /
mono detector's threshold. Mono music with a "speech-like" envelope
may be incorrectly detected as "speech." Music incorrectly detected as
"speech" will exhibit a slight loss of loudness and punch, but misdetec-
tion will never cause objectionable distortion on music.
Speech that is not located in the center of the stereo sound field will al-
ways be detected as "music" because the detector always identifies ste-
reo material as "music." This can increase clipping distortion on such
speech.
If the B
matically set it to M
(unless L
and bass clipping will stay H
Speech always sounds cleaner with M
creased bass "punch" supplied by H
This control does not affect the HD processing chain.
MB Speech Threshold ("S
) lets you set the increment (in dB) by which the setting of the MB L
C
ONTROL
control is reduced when speech is detected (see Lookahead, above). This control is
particularly useful in minimizing speech distortion when you use the LLH
clipper—it allows the main clipping distortion controller to work harder on speech
while preserving punch in music.
This control does not affect the HD processing chain.
Speech Detect ("S
allows you to override the automatic speech/music detector, forcing the processing
into S or M
PEECH USIC

To Override the Speech/Music Detector

It is possible to force your Optimod into "speech" or "music" mode via its GPI and
API. One can achieve this functionality by creating a "speech" preset and a "music"
preset and programming the GPI to recall these presets as desired. To do so:
A) Create a preset with the desired settings for the music-mode and speech-
mode controls. Set its S
B) Save this preset as a User Preset.
C) Set the S
PEECH
I , O , and A .
N UT UTO
is set to H
C M
ASS LIP ODE
when speech is detected and H
EDIUM
is L , in which case M
ATENCY OW
ARD
T ," located in the Speech page of A
PEECH HR
," located in the Speech page of A
D
PEECH ETECT
mode The three available modes are S
.
D
PEECH ETECT
control to S
D
ETECT
, the speech/music detector will auto-
ARD
bass clipping is unavailable
EDIUM
).
bass clipping and the in-
EDIUM
is irrelevant to speech.
ARD
PEECH
control to M .
USIC
.
PEECH
OPERATION
otherwise
ARD
DVANCED
T
IMIT HR
bass
ARD
)
C
DVANCED ONTROL
, and A
, M .
USIC UTO
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