dcibel's latest activity
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Ddcibel replied to the thread FSAF (Fast subband adaptive filtering) measurement.If you've not allocated enough RAM for REW at time of install, it will produce an out of memory error if IR length is too long. For...
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Ddcibel replied to the thread FSAF (Fast subband adaptive filtering) measurement.Try increasing IR length to 500ms, I can reproduce similarly bad results with IR length too short. I think perhaps 300ms provides the...
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Ddcibel replied to the thread FSAF (Fast subband adaptive filtering) measurement.Same amp loopback measurement as a sine sweep.
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Ddcibel replied to the thread FSAF (Fast subband adaptive filtering) measurement.I can't speak to your problems @JanRSmit, there's lots of possible causes for what you are encountering. Sine sweep or RTA measurements...
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Ddcibel replied to the thread Phase wrapping with loopback.You measured excess phase with your loopback timing reference. It takes time, as in milliseconds, between loopback impulse and actual...
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Ddcibel replied to the thread Phase wrapping with loopback.If you're talking about using a loopback cable as a timing reference, what you're observing is excess phase due to time of flight for...
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Ddcibel replied to the thread REW Beta Release REW API beta releases.Currently, SPL scale does not change, but dBFS scale does, and in the wrong direction. I would expect that dBFS scale remains unchanged...
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Ddcibel replied to the thread FSAF (Fast subband adaptive filtering) measurement.If you are talking about the TRS vs XLR for 48V phantom power, I've used 3 different audio interfaces, and found this to be true of all...
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Ddcibel reacted to FSAF's post in the thread FSAF (Fast subband adaptive filtering) measurement with
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I have been playing with current measurements for quite a while but have not found a way to make much sense of them. First, you need a... -
Ddcibel replied to the thread FSAF (Fast subband adaptive filtering) measurement.Thanks for getting back to me, FSAF. I am using a Motu M4 for my measurements, like any USB audio interface, 48V power on/off is just a...
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Ddcibel replied to the thread REW Beta Release REW API beta releases.Hi John, For FSAF, If I adjust a measurement level by -10dB for example and select "add to data", it appears that the level on the...
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Ddcibel replied to the thread FSAF (Fast subband adaptive filtering) measurement.@FSAF would you have any ideas / suggestions for a "current sense" circuit that would be less dependent on the driver impedance, and...
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Ddcibel replied to the thread FSAF (Fast subband adaptive filtering) measurement.Of course, this electrical measurement doesn't unveil all distortion products for a complete loudspeaker, there appears to be distortion...
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Ddcibel replied to the thread FSAF (Fast subband adaptive filtering) measurement.Revisited my Atari speaker (Satori MW16P + Melodavid Be28 combo) with this measurement method. I really like that this measurement is...
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Ddcibel replied to the thread FSAF (Fast subband adaptive filtering) measurement.lol, 0R1 = 0.1 ohm., words I wrote under the image should have made it clear. Back in "the olden days" many schematics were photocopied...
