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Signal Processing

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  • $\begingroup$ Are you assuming to order the azimuths and elevations indipendently? Because (maybe i'm wrong) if i do this way, i could end up with a couple of (azimuth,elevation) which doesnt exist in my dataset. I edited my question with an example of the available positions data. I am sorry but I didn't understand the second point, what do you mean by 'also found in the first case'? $\endgroup$ Commented Jan 14, 2021 at 9:50
  • $\begingroup$ @MattiaSurricchio Yes my approach to find triangles only works for mesh grid of azimuth-elevation pairs, so it doesn't work for your database. Maybe you can search for a mature VBAP code, or choose another database. I think most databases have uniformly distributed source positions, because it is easy to do the measurement. And the second point is saying that as seen from the waveform of your first audio example without interpolation, the jumping gains are also observed. $\endgroup$ Commented Jan 14, 2021 at 12:25
  • $\begingroup$ Did you plot the waveform of the audio file? I actually didn't, but from the only listening perspective, it seemed that the volume of my audio file in the different spatial positions is more or less constant, there are no huge jumps in the perceived audio volume. Do you have any other database you could suggest me? The ones that i know (KEMAR, CIPIC ecc...) they still have the same problem i mentioned, you have fixed couples of (azimuth,elevation). Maybe i'm doing something wrong, but ordering azimuth and elevations indipendetly, could lead to the same problem i've already mentioned $\endgroup$ Commented Jan 14, 2021 at 12:48
  • $\begingroup$ If you are referring to those spikes, as you might notice they're almost periodical, they are probably the consequence of my real time processing. I'm basically taking n samples from real time audio and then i convolve them with the selected HRIR. $\endgroup$ Commented Jan 14, 2021 at 13:11
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    $\begingroup$ @MattiaSurricchio A decently working HRTF processing will not produce these peaks, unless your input signals contain these peaks periodically. Otherwise, there is something wrong with your framing operation. BTW, the database I use is Priceton's 3D3A database, which has 72 azimuths: [0°, 5°, 10°, …, 355°] and 9 elevations: [–57°, –30°, –15°, 0°, 15°, 30°, 45°, 60°, 75°] (72 × 9 = 648 positions in total). $\endgroup$ Commented Jan 14, 2021 at 13:23