I use and recommend SmaartLive (software on a PC) which is the industry standard for pro live sound work. In addition to RTA functions, it has real-time transfer function measurement . . . which is a much faster, more stable, and more accurate display mode than an RTA. Its FFT parameters include a FPPO (fixed-point-per-octave) setting, which greatly reduces the need to change FFT parameters to properly resolve the frequency domain of interest.
Phase and time-domain (impulse response) data are additional functions, and it can do so both with test signals or program material (music). It even has a good speaker-impedance testing function.
Phase and time-domain (impulse response) data are additional functions, and it can do so both with test signals or program material (music). It even has a good speaker-impedance testing function.