On Wed, Sep 21, 2022 at 02:02:58AM +0200, Michael Jarosch wrote: > After that I took a > paper bag to create an impulse, about 50cm away from the NT-SF1. If the room is big enough, you could use a larger distance. This will reduce the amplitude of the the impulse but not the room response, so you could have a better S/N ratio. A paper bag (or balloon) is not ideal, there are alternatives, see below. > The only tool in my procedure that wasn't free and open was Rødes Soundfield > PlugIn, so I had to use some tricks to get manufacturer proven A-to-B > conversion of my recordings. There is NT1 preset available for tetraproc (real-time A/B processor, Jack) and tetrafile (file processor doing the same). I can send it if you want. The method of choice today is not to use balloons or pistols, but a logarithmic sweep signal and deconvolution with the inverse sweep. This will give you 1. A more correct result, since the spectrum of the test signal is exactly known (apart from the speaker used to play it), 2. A much better S/N ratio since the test signal can be several seconds long so it has much more energy at the same amplitude as a popping balloon. Ciao, -- FA _______________________________________________ Linux-audio-user mailing list Linux-audio-user@xxxxxxxxxxxxxxxxxxxx https://lists.linuxaudio.org/listinfo/linux-audio-user
