Recent content by jhaider

  1. J

    How many subwoofers are you using in your main system or home theater?

    I would never want the TV lower. Our current home has a blank front wall but the TV is mounted at about the same height as in our old home in that photo. First, the center channel should be the same loudspeaker as L/R, in the same orientation and the same height. The main flaw in that system...
  2. J

    How many subwoofers are you using in your main system or home theater?

    Main system (immersive) has three subs, all "DIY" (I bought the drivers, designed the cabinets, had them professionally built): Currently they are: 1) BMS 18N850, 85L closed box designed to look like a cabinet (and with some useful storage) 2) 2x Aurasound NS15-992-4A (both firing into the front...
  3. J

    Earthworks M30 - mathematical cal file transform to get 90 deg cal file?

    I know this has been done for UMIK, but does anyone have a mathematical transform to get a good-enough 90 deg cal file for Earthworks M30? I realize I could get a 90 deg cal file using John Reekie's method - but I'm lazy! I have my M30's ECF, and Earthworks also supplied me a "generic"...
  4. J

    REW Pro Multi-input SPL calibration, again (this time channels 5-8)

    This thread is a continuation-but-not of my thread last year regarding multi-input SPL calibration. Since then two things have changed: 1) I ended up getting an inexpensive microphone calibrator. 2) I picked up a Motu 8Pre interface to expand to up to 8 channels. However, I can't figure out...
  5. J

    REW Pro - relative SPL calibration for 4 mics

    That would be great, thanks!
  6. J

    REW Pro - relative SPL calibration for 4 mics

    What's the most efficient workflow to calibrate four microphones to be equal in SPL for a given input for multi-mic measurements in REW? Is there a decent way to do so without using an external SPL meter? I recently upgraded to REW Pro with an eye to using it for two things. First, taking...
  7. J

    Help setting up Focusrite Clarett 4Pre USB in Focusrite Control for REW with loopback

    Yeah, it was a dumbass mistake...I was actually injecting the test tone into the DSP through the Mac mini's optical output rather than the 4Pre's coax digital out. So there was nothing to loop back! I tested it tonight (at low levels) and am getting a consistent -12dB loopback channel level now...
  8. J

    Help setting up Focusrite Clarett 4Pre USB in Focusrite Control for REW with loopback

    In all candor, time. After all, it took me almost 3 months to go from asking the question to blocking off the time to study and attempt implementation! That said, I did try it and I could pick my mic input but loopback did not work. REW said the level was 97dB too low or something like that.
  9. J

    Help setting up Focusrite Clarett 4Pre USB in Focusrite Control for REW with loopback

    To come back to this, I finally had a chance to read the guide - thanks! - and go back to the Clarett 4Pre. The guide was very helpful but not wholly on point, because 4Pre USB has more complex I/O. That said, after reading the guide, watching a video tutorial or two, fumbling around in the...
  10. J

    Help setting up Focusrite Clarett 4Pre USB in Focusrite Control for REW with loopback

    I recently picked up a Focusrite Clarett 4Pre USB because I thought I might buy REW Pro and make simultaneous measurements to save time. However, I've been messing with the Focusrite Control software and simply cannot make heads or tails of how to set up the interface for use with REW and a...
  11. J

    New setup - configure as immersive speaker layer as "heights" or "tops"?

    Interesting.Did you write the experiment up? I’m curious about two things: 1) What was the quality of loudspeakers used for the immersive layer in your experiment? Did they have constant or well-controlled directivity with no dispersion disruption at the mid-tweeter crossover? Wide or narrow...
  12. J

    New setup - configure as immersive speaker layer as "heights" or "tops"?

    I don’t follow. That’s like saying the soundstage in a 2 channel system is not affected by speaker placement as long as their levels are matched at the LP. Setting speakers up consistent with ITU standards (listener at a 30deg to each speaker) generally works best. Here that is NOT the case...
  13. J

    New setup - configure as immersive speaker layer as "heights" or "tops"?

    As I understand it (could be wrong), yes. It’s not about level, it’s about mapping. And the more I think about it, it seems elevation angle is the key factor. Dolby seems to want "tops" to be inward rather than above the mains - how stupid, especially considering normal living spaces will...
  14. J

    New setup - configure as immersive speaker layer as "heights" or "tops"?

    We recently moved and had a 7.1.4 channel system (4 subs) installed in our new living room. I’m not sure whether I should set the immersive channel layer as heights or tops in the HTP-1. Here’s why: -The immersive-layer speakers are are mounted in the ceiling, BUT in positions roughly over...
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