A signal processing apparatus: specifies a capture time of a plurality of captured images that are captured from respectively different directions by a plurality of cameras in order to generate a virtual-viewpoint image corresponding to a designated virtual viewpoint; obtain an audio collection signal based on collection of audio of an audio collection target region by a microphone, wherein the audio collection target region includes at least a part of a capturing range of the plurality of cameras; generates an audio signal to be reproduced together with the virtual-viewpoint image corresponding to the capture time specified by the specification unit, by using the obtained audio collection signal based on collection by the microphone at a point in time prior to the specified capture time.