If you are making spectrum analysis with an external source and not using REW internal generator it could be better you use white noise and measure spectrum response applying an FFT windows such Hanning or Hamming for example, because it is important to make FFT over samples buffers that begin and end with which 0 values (near to be periodic) see:, If your input signal is an externally generated sweep it can be a burst short enough to be contained into the buffer and pre-triggered in order to live zeros at the beginning, otherwise you may acquire a very log sweep using Hanning. Play word games with friends in solo single or multiplayer gathered around the tabletop at a party. Challenging word puzzles will light up your day. Hi, I have some experience in aerospace acoustic an vibration measurements when I was young, and I am playing with REW measurements at home, Pictoword is a cool, simple yet addictive word game where you 'read' two pics that combine to create a word or phrase. I have so many questions for you guys haha Not sure if I'm in the right section of the forum. Can this be related to the measurement method ? Is it a phenomenon related to the (most of the time really crappy) speakers or is it purely acoustic ? For example, a strong resonnances (room mode ?) decaying at 150Hz that drift to 135Hz after 100ms.
#CAN WE USE 3 SWEEP OFLINE HOW TO#
Is phase/group delay information reliable ? When playing on devices that have a bad quality DAC, how does this translate into the measurements ?įor example, I'm frequently seeing "drifting" in waterfall plot and don't know how to interpret those. I was just wondering what could appear using this method ? Room eq wizard has this fantastic feature "import sweep recording" allowing exactly that. To access more information than whata frequency response can offer, I started to dive into room eq wizard. Most of the time we have to do measurements in offline mode (aka open loop), meaning the computer isn't sending the measurement signal. I'm a professional sound engineer (music recording/mix/mastering, website), and just started a job in car audio, diving more into acoustic measurements. Just bought a hidiz DAC and I'm super happy with it.
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I've been lurking this forum for some months, thank you everyone for your fantastic data.