vall - view all el's for az or all az's for el in HRTF. vall( h, az, el, tf, tflog, lr, of, win ) h - sarc struct az - azimuth (degrees) (see below) el - elevation (degrees) (see below) tf - view transfer functions flag (default = 0) tflog - log frequency flag (default = 0) lr - 0 = left, 1 = right (default = 0) of - data offset (default = 1) win - data window (default = length of IR - of + 1) If az specified and el == [], vall() iterates through all el's at az. If el specified and az == [], vall() iterates through all az's at el.