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ORTF details?

Discussion in 'Recording' started by took-the-red-pill, Apr 29, 2005.

  1. took-the-red-pill

    took-the-red-pill Active Member

    Jan 10, 2005
    Near Clagary
    Home Page:
    How picky does one have to be about the exact angle, and distance between capsules when using ORTF?

    If 'very picky,' why?

    What works best, cardioid, hypercardioid, or omni?

  2. ghellquist

    ghellquist Guest

    If you want to do ORTF you should probably be very picky. As it stems from a state owned radio channel, they are probably very detailed in the requirements when done by their engineers in house.

    On the other hand, if what you are trying to do is to make stereo recordings just about any setup will give you a sound. A few variations on the theme has even got their own names, one example is the so-called DIN setup.

    Any change from the ORTF setup, will give some kind of difference, which might give a better sound in a specific situation. So go ahead.

    ORTF is specified with standard cardoid mics. But you can use any kind of mic really, if you like the sound you get.

  3. zemlin

    zemlin Distinguished Member

    Sep 4, 2004
    Indianapolis, IN
    Home Page:
    Different mics have different patterns. You may need to tweak the angle to keep from getting a hole in the middle of your stereo image.
  4. Midlandmorgan

    Midlandmorgan Active Member

    Jul 21, 2002
    ORTF standards (IIRC) call for a closely matched cardiods approx 7" apart, at a 110 degree angle between capsules...)approximately the typical size of a human head...

    DIN specs at a 90 degree spread with just under 8" between capsules.

    According to things I've read (Audio in Media, Alten, and many others, precision placement is critical. Minor degree changes between capsules and slight skewing off the 0 degree line can result in phasing, imbalances, etc...

    ORTF and DIN call for cardiods...others (Blumlein and Faulkner techniques, both VERY cool!) call for figure 8s...

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