Chris,
the audio you are dealing with is going to be challenging to deal with
on a straight normalisation basis.
Normalisation just sets the levels based on the electrical signal.
Loudness is determined by what that signal is composed of and what the
processing people call density.
A single voice will be a lot less powerful than a rock band, given the
same normalisation.
You can set the levels by auditioning each track. Not that big a deal
And/Or you can have some sort of audio processor that irons out the
audio going to the transmission chain.
Spoken word is a challenge, especially if there is to be some
preservation of the nuances in the voice that a good story teller uses
for dramatic effect.
The kind of processing they use on AllHitMusic stations will destroy all
of that.
Start with the audio you have and grade it using the same speakers at
the same level and listening to the comparative loudness of each track
and making adjustments.
Jack and Jammin produce a great result, but you may have some outboard
processor available. I always liked the Gentner Prism, but there are
other more recent ones others may recommend.
If you get the playout levels right you may be surprised how little you
need to do after that.
regards
Robert Jeffares
Thames
New Zealand
On 23/01/14 07:27, Chris Howard - CBR wrote:
I am importing spoken-word .mp3 files.
There is a wide variation in audio level.
I am using rdimport from the command line with
minimal option flags, I think that means I am getting
the default normalization.
My goal is to have every cut come out at the same
average level.
I am going into each cart and editing the start and
end points of the cut. Some of them show a small
waveform and I bump up the "cut gain". I don't know the
difference between the "cut gain" and "Amplitude" controls.
I have not been using "Amplitude"
My real reason for thinking about this now is that I'm
starting to pencil-in an audio path for our new
station and I wanted to know if I'm going
to need post-Rivendell compression processing, either something
on the computer or an external processor.
Now that I have about 600 carts loaded I'm starting
to feel the weight of getting it right so I don't have
to go back and adjust every one over and over as I
figure out what I've been doing wrong. Maybe it's
time to do it right.
Learning new stuff every day.
Chris Howard
Classic Book Radio
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