Table of Contents
Advertisement
OPTIMOD-PC
For best results, feed OPTIMOD-PC unprocessed audio. No other audio processing
is necessary or desirable.
In digital radio applications, if you wish to place level protection prior to your stu-
dio/transmitter link (STL), use an Orban studio AGC like the Orban 8200ST. The
8200ST can be adjusted so that it substitutes for the broadband AGC function in
OPTIMOD-PC, which is then defeated. Other types of AGC systems may adversely
affect the audio.
General Features
•
Optimod-quality digital audio processing on a PCI sound card—pre-
processes audio for consistency and loudness before it is transmitted or re-
corded.
•
Functions as two independent sound devices. (Note that there is only one
audio processing chain; only input routing, output routing, and mixing functions
are duplicated.)
•
Available in two versions: 1101 for PCI sockets and 1101e for PCIe (PCI Ex-
press) sockets.
•
Applications include netcasting, HD Radio® (both primary and secondary digi-
tal channels), DAB and other dedicated digital radio services, FMExtra™ and
other digital subcarriers, mastering, audio production, and many others.
•
Supplied WAVE drivers allow OPTIMOD-PC's processed output to pass through
the PCI bus to the CPU, driving standard PC applications like Orban's Opticodec-
PC MPEG-4 HE-AAC, Microsoft, or Real streaming encoders. OPTIMOD-PC's audio
driver allows it to appear as two sound devices to the computer's operating
system. The driver (with the aid of concurrently running third-party software) al-
so allows OPTIMOD-PC to receive audio over IP from the host computer's net-
work connection. Drivers are available for 32 and 64-bit Windows XP, 32 and
64-bit Windows Vista, and 32 and 64-bit Windows 7.
•
Orban's PreCode™ technology manipulates several aspects of the audio to min-
imize artifacts caused by low bitrate codecs, ensuring consistent loudness and
texture from one source to the next. PreCode includes special audio band detec-
tion algorithms that are energy and spectrum aware. This can improve codec
performance on some codecs by reducing audio processing induced codec arti-
facts, even with program material that has been preprocessed by other process-
ing than Optimod.
•
While primarily oriented toward "flat" media, OPTIMOD-PC can also pro-
vide preemphasis limiting for the two standard preemphasis curves of 50μs
1-11
INTRODUCTION
Advertisement
Table of Contents
