Orban OPTIMOD 6300, Руководство по эксплуатации

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OPTIMOD 6300 DIGITAL INTRODUCTION
1-21
Monitoring on Loudspeakers and Headphones
In live operations, highly processed audio often causes a problem with the DJ or
presenter’s headphones. The delay through OPTIMOD 6300 can be as much as
25ms (or more, if the installer purposely adds frame-makeup delay). This delay, al-
though not usually audible as a distinct echo, can cause bone conduction comb fil-
tering of the DJ/presenter’s voice in his/her ears. This is almost always very uncom-
fortable to them.
OPTIMOD 6300’s processing can emit the output of either the multiband compressor
or AGC before their associated look-ahead peak limiters, which is where the major-
ity of the delay occurs. The AGC and multiband pre-limiter signals can be routed to
any output. The input/output delay of the pre-limiter signal is approximately 3 ms
for the AGC or 5 ms at the multiband compressor. This delay can still be uncomfort-
able to some, but most DJ/presenters find it acceptable and almost anyone can get
used to it.
See page 6-41 for a diagram of the signal routing.
Streaming and Netcasting Applications
This section was written in mid 2006. As the state of the art in netcasting is changing
with ferocious rapidity, we expect it to become outdated quickly. Please check
Orban’s web site, www.orban.com, for newer information.
Using OPTIMOD 6300 in Streaming Applications
You need an audio source connection (either analog, AES3 digital, or SPDIF digital).
The digital input can accept any sample rate from 20 to 96 kHz. You can also use any
stream available within the computer’s internal WAVE audio system, such as a digital
playout system. If you use the computer’s WAVE audio system, you will need a sound
card with full duplex capability and digital inputs and outputs. Connect the digital
output of the sound card to the 6300’s digital input and connect the 6300’s digital
output to the input of the sound card.
You will ordinarily connect the signal that the sound card receives to the input of an
encoder application, like Orban’s Opticodec-PC, Microsoft Windows Media Encoder,
Apple QuickTime® Broadcaster, or RealNetworks’ Real/Helix Producer. You then ap-
ply the encoded output of the encoder to a netcast server application, which may
operate on the same machine as the encoder, or on a different machine on your
network. In the latter case, you will route the encoded audio to the netcast server
application through your network.
See Processing for Low Bit Rate Codecs on page 3-4.
Loudness
You can expect a significant increase in loudness from OPTIMOD 6300 processing by
comparison to most unprocessed audio.