The software application published by MSC Software that features the module called **FFT_Actran_VA** is **MSC Nastran**.
**FFT_Actran_VA** refers to a specific feature within the Actran software, which is a part of the MSC Software suite focused on acoustics and vibroacoustics analysis. The "FFT" stands for Fast Fourier Transform, a mathematical algorithm used to compute the discrete Fourier transform and its inverse, which is essential in