This version includes a major improvement over 200-700 Hz. Sources in that frequency range that were located in the wrong place in the Display before should appear correctly now. Tests using a powerful loudspeaker in an open park show that the ACAM 100 with Version 4.300 of BeamformX can locate point sources over the range of 50 Hz to 25 kHz. The new software version does not change the behavior of BeamformX outside of 200-700 Hz, but the system was working fine for those frequencies already. In testing this capability, note that it is not easy to get good point source data at low frequency. Indoors, there are likely to be standing waves. Outdoors, it takes a large speaker and a powerful amplifier to exceed the background noise in the neighborhood of 50 Hz with a white noise signal. I have only tested the version with ACAM 100. I expect the results will be the same with ACAM 120, but it remains to be proven.
Version 4.300 includes two other changes. The Display now shows the version number next to the "QB" notation in the upper left corner. Also, a bug introduced in Version 4.202 caused frequency changes to be glitchy. The selected time interval would be reprocessed several times. This has been fixed. Frequency changes in the 200-700 Hz range are now a little slow for a different reason: some new computations are needed.