Recent content by dotnet

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    log4j vulnerability?

    It looks like REW uses SimpleLogger via slf4j, at least in the macOS version.
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    REW & IPad!

    I’m running REW on a headless Mac mini with Remote Control enabled, and use my iPad as display/keyboard/touchpad via the Screens app.
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    Measuring Frequency Response and Distortion of amplifiers (4x150w RMS and 4x80W RMS)

    If you look up the specs of the Behringer device, the maximum input level is actually +20dBu, i.e. ~7.75V. The ~3V over the 2.2k resistor at 150W will be fine.
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    Measuring Frequency Response and Distortion of amplifiers (4x150w RMS and 4x80W RMS)

    The UMC 202HD has a max. input level of +20dBu at the line input (i.e. 7.75Vrms), so that won’t be overloaded by your circuit under any circumstances. Just don’t fry that 8Ω resistor, they need good heat-sinking from a few watts upward.
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    Measuring Frequency Response and Distortion of amplifiers (4x150w RMS and 4x80W RMS)

    Given those resistor values (2.2k and 22k), the Behringer input impedance (27k) and its max. input level (2dBV, i.e. 1.26Vrms), you can put just under 28W through that 8Ω resistor before you overload the Behringer input. That‘s already more than the resistor will take without a largish heatsink...
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    Feature request: Number of taps on filter export

    For better compatibility with convolver software it would be nice if the number of filter taps could be limited upon exporting filters as WAV. Currently, the number of taps results automatically from the export sample rate and the WAV duration (just under 3 seconds). With sample rates higher...
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    REW as tool for choosing the right skyline and other diffusers

    I believe the Spectrogram would be a good place to start. It’ll help with spotting the frequency ranges needing reverb treatment, as well as confirming any improvements.
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    J-Test

    I’m no expert, but the distortion seems a bit higher almost across the entire frequency range in the after measurement, probably for unrelated reasons. If anything, the tweeter behaviour seems smoother in the second graph. I don’t think there is any damage. When one of my tweeters was damaged...
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    J-Test

    When I had a damaged tweeter the uneven SPL plot (compared to the other speaker) was a first hint, but the distortion plot left no doubt. Distortion was through the roof on the damaged one.
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    Hang Loose Convolver cheat sheet?

    Thanks, I might consider it in the future, depending on available tools. Unfortunately, Audiolense requires a Windows PC which is a bridge too far for me :) I’m only applying room correction in the sub-Schroeder and transitional range in an acoustically well-treated room, not HT surround or...
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    Hang Loose Convolver cheat sheet?

    Thanks Mitch, much appreciated. So the REW filters are suitable for HLConvolver after all. What I’m still struggling with (conceptually) is this: in REW, all the supported target devices implement IIR filters, at least as far as I can see. I wonder whether this is taken into account when...
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    Hang Loose Convolver cheat sheet?

    I was hoping to use REW to create the filters, because that’s what I have and know. Are REW filters not suitable, despite being exportable in WAV format, as requested by HLC?
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    Hang Loose Convolver cheat sheet?

    Pardon me for following up myself… I think I may have got the service that AccurateSound provides (create a filter from submitted mdat files) confused with what the HLConvolver software does. After a bit more reading I think I need to feed the HLConvolver a filter calculated by REW and exported...
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    Hang Loose Convolver cheat sheet?

    Does anyone have a short list of what to do or to avoid when exporting impulse responses for use as filters (or filter sets) with Hang Loose Convolver (accuratesound.ca)? I gather that I should export the measured impulse response in 32bit float format, or should I export the min phase version...
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