Become a Site Supporter and Never see Ads again!

Author Topic: How to decide for the correct bass roll-off settings?  (Read 6443 times)

0 Members and 1 Guest are viewing this topic.

Offline dklein

  • Trade Count: (0)
  • Taperssection All-Star
  • ****
  • Posts: 1184
  • Gender: Male
Re:How to decide for the correct bass roll-off settings?
« Reply #15 on: October 01, 2003, 01:51:34 PM »
Here's the easiest way to convert.  You need to know the rolloff frequency and impedance assumed by your battery box maker for their calculations.  They will be able to tell you if it's not labelled or in your manual.

Actual rolloff freq. = stated rolloff freq * stated impedance / your impedance

frequency is in Hertz (Hz)
impedance is in Ohms - usually with a 'k' in front meaning thousands

So if they say 120Hz at 4.7k and you've got a 10k impedance on your recorder:
Actual = 120*4.7/10
           = 56 Hz
KM 184 > V2 > R4
older recording gear: UA-5  / emagic A62 / laptop / JB3 / CSB / AD20 / Sharp MT-90 / Sony MDS-JE510
Playback: Pioneer DV-578 > Lucid DA 9624 >many funny little british boxes > Linn Isobarik PMS

Offline Sean Gallemore

  • Trade Count: (2)
  • Needs to get out more...
  • *****
  • Posts: 8316
Re:How to decide for the correct bass roll-off settings?
« Reply #16 on: October 02, 2003, 02:41:25 PM »
this has me thinking, I have my BB@ 95htz, but I go line-in

i wonder if the bass roll-off is actually working

Offline zhianosatch

  • Trade Count: (1)
  • Needs to get out more...
  • *****
  • Posts: 8992
  • Gender: Male
  • god-damned hippies!
Re:How to decide for the correct bass roll-off settings?
« Reply #17 on: October 02, 2003, 03:41:11 PM »
yes, schwilly, it is, but not by much
dklein is right on, i've had detailed conversations about this very subject
so the bottom line is, sound pro is completely wrong in using those frequency settings

Offline dklein

  • Trade Count: (0)
  • Taperssection All-Star
  • ****
  • Posts: 1184
  • Gender: Male
Re:How to decide for the correct bass roll-off settings?
« Reply #18 on: October 02, 2003, 04:19:41 PM »
this has me thinking, I have my BB@ 95htz, but I go line-in

i wonder if the bass roll-off is actually working

Call/write sound profs to find out what impedance they used for the rolloff calculation and then look up the number in your manual.  I can help you from there...

If I had to guess, thru line-in on your Sharp md you'd be getting a rolloff anywhere from 1/4 to 1/2 the value published (like 25-50 Hz) and wouldn't likely hear much difference between the two.  Take it to a show you don't care about taping and record, switching back and forth taking note of the time you make the switch.
« Last Edit: October 02, 2003, 04:28:13 PM by dklein »
KM 184 > V2 > R4
older recording gear: UA-5  / emagic A62 / laptop / JB3 / CSB / AD20 / Sharp MT-90 / Sony MDS-JE510
Playback: Pioneer DV-578 > Lucid DA 9624 >many funny little british boxes > Linn Isobarik PMS

Offline Sean Gallemore

  • Trade Count: (2)
  • Needs to get out more...
  • *****
  • Posts: 8316
Re:How to decide for the correct bass roll-off settings?
« Reply #19 on: October 03, 2003, 02:44:59 AM »
this has me thinking, I have my BB@ 95htz, but I go line-in

i wonder if the bass roll-off is actually working

Call/write sound profs to find out what impedance they used for the rolloff calculation and then look up the number in your manual.  I can help you from there...

If I had to guess, thru line-in on your Sharp md you'd be getting a rolloff anywhere from 1/4 to 1/2 the value published (like 25-50 Hz) and wouldn't likely hear much difference between the two.  Take it to a show you don't care about taping and record, switching back and forth taking note of the time you make the switch.

thanx for the help!  I didn't think it doing much, which is ok because these mics aren't bassphiles anyway

I don't even make it to shows I want to go to!

 

RSS | Mobile
Page created in 0.077 seconds with 30 queries.
© 2002-2024 Taperssection.com
Powered by SMF