[genericaudioperson]

Hello,

If a mic has a low-frequency roll-off switch, is that an
electronically cleaner way to reduce low-frequency rumble compared to
rolling it off on the mixer eq?

[Mike Rivers]

genericaudioperson wrote:

If a mic has a low-frequency roll-off switch, is that an
electronically cleaner way to reduce low-frequency rumble compared to
rolling it off on the mixer eq?

Usually there's no significant difference. However, depending on the
frequencies you need to get rid of, one might be more effective than the
other due to differences in the cutoff frequency and and slope.

Whenever you apply any sort of signal processing, you have to look at
more than just one parameter of "electrically clean." You have to decide
if the results are better with or without it, or with one or the other
alternative.

--
If you e-mail me and it bounces, use your secret decoder ring and reach
me he
double-m-eleven-double-zero at yahoo -- I'm really Mike Rivers
)

[Ty Ford]

On Fri, 28 Nov 2008 19:39:15 -0500, genericaudioperson wrote
(in article
):

Hello,

If a mic has a low-frequency roll-off switch, is that an
electronically cleaner way to reduce low-frequency rumble compared to
rolling it off on the mixer eq?

In theory, yes. Excessive LF "takes up space" in the preamp if not rolled off
at the mic.

In practice, your mileage may vary, BUT.....

I just ran into this on a video shoot this week. There was some relatively
big amount of structure-born LF getting into my wireless body mics that was
modulating the audio. If I had had a high-pass filter before the transmitter,
I think it would have been helpful.

Regards,

Ty Ford

--Audio Equipment Reviews Audio Production Services
Acting and Voiceover Demos http://www.tyford.com
Guitar player?:http://www.youtube.com/watch?v=yWaPRHMGhGA

[Greg Boboski]

Another way of putting that is
a roll off before the preamp can affect
the headroom & possible overload of the pre

having it in the pre depends on where it is IN the pre and can affect
the following chain , mixer or recorder





"Ty Ford" wrote in message
al.NET...
On Fri, 28 Nov 2008 19:39:15 -0500, genericaudioperson wrote
(in article
):

Hello,

If a mic has a low-frequency roll-off switch, is that an
electronically cleaner way to reduce low-frequency rumble compared to
rolling it off on the mixer eq?

In theory, yes. Excessive LF "takes up space" in the preamp if not rolled
off
at the mic.

In practice, your mileage may vary, BUT.....

I just ran into this on a video shoot this week. There was some relatively
big amount of structure-born LF getting into my wireless body mics that
was
modulating the audio. If I had had a high-pass filter before the
transmitter,
I think it would have been helpful.

Regards,

Ty Ford

--Audio Equipment Reviews Audio Production Services
Acting and Voiceover Demos http://www.tyford.com
Guitar player?:http://www.youtube.com/watch?v=yWaPRHMGhGA

[Rafael de la Uz]

On Nov 29, 10:50*am, "Greg Boboski" wrote:
*Another way of putting that is
a roll off before the preamp can affect
the headroom & possible overload of the pre

having it in the pre depends on where it is IN the pre and can affect
the following chain , mixer or recorder

"Ty Ford" wrote in message

al.NET...

On Fri, 28 Nov 2008 19:39:15 -0500, genericaudioperson wrote
(in article
):

Hello,

If a mic has a low-frequency roll-off switch, is that an
electronically cleaner way to reduce low-frequency rumble compared to
rolling it off on the mixer eq?

In theory, yes. Excessive LF "takes up space" in the preamp if not rolled
off
at the mic.

In practice, your mileage may vary, BUT.....

I just ran into this on a video shoot this week. There was some relatively
big amount of structure-born LF getting into my wireless body mics that
was
modulating the audio. If I had had a high-pass filter before the
transmitter,
I think it would have been helpful.

Regards,

Ty Ford

--Audio Equipment Reviews Audio Production Services
Acting and Voiceover Demoshttp://www.tyford.com
Guitar player?:http://www.youtube.com/watch?v=yWaPRHMGhGA

From SD 302 Op Manual
The 302’s high-pass
circuit is unique because of its placement before any electronic
amplifi cation. Most mixer’s highpass
circuits are placed after the mic preamp, where all of the high-energy
low-frequency signals get
amplifi ed. Because the 302’s circuit cuts low-frequency signals
before amplifying, higher headroom
is achieved in presence of signals with a lot of low-frequency energy.