Generation of audio-synchronized visual content

A method for generating audio-synchronized visual content, the method performed by an image capture device including one or more processors, an image sensor, an optical element, and a speaker, the image sensor configured to generate a visual output signal conveying visual information based on light that becomes incident thereon, the visual information defining visual content, the optical element configured to guide light within a field of view to the image sensor, the speaker configured to provide playback of audio content for capture of the visual content, the audio content having an audio progress length, the audio content including music, the method comprising:

• determining speed of audio content playback through the speaker during a capture duration based on speed of visual content capture by the image capture device for the capture duration;
• effectuating the playback of at least a portion of the audio progress length of the audio content at the determined speed of the audio content playback through the speaker during the capture duration, wherein at least a first duration of the music is played through the speaker during the capture duration;
• capturing the visual content during the capture duration at the speed of the visual content capture with the playback of the at least the portion of the audio progress length of audio content through the speaker, the visual content having a visual progress length based on the capture duration, wherein the image capture device internally tracks timing of the audio content playback during the capture duration, wherein the internally tracked timing of the audio content playback is matched to timing of when the visual content is captured by the image capture device;
• synchronizing the visual content captured during the capture duration with the at least the portion of the progress length of the audio content based on the matching of the internally tracked timing of the audio content playback to the timing of when the visual content is captured by the image capture device;
• and
• generating a video file including the visual content, wherein the first duration of the music that is played through the speaker during the capture duration is copied from an original music file for the music to the video file.

An image capture device for generating audio-synchronized visual content, the image capture device comprising:

• a housing;
• an image sensor carried by the housing and configured to generate a visual output signal conveying visual information based on light that becomes incident thereon, the visual information defining visual content;
• an optical element carried by the housing and configured to guide light within a field of view to the image sensor;
• a speaker carried by the housing and configured to provide playback of audio content for capture of the visual content, the audio content having an audio progress length, the audio content including music;
• one or more physical processors configured by machine-readable instructions to:
• determine speed of audio content playback through the speaker during a capture duration to be inverse of speed of visual content capture by the image capture device for the capture duration, wherein the speed of the audio content playback through the speaker during the capture duration is decreased based on time-lapse capture of the visual content and the speed of the audio content playback through the speaker during the capture duration is increased based on slow-motion capture of the visual content;
• effectuate the playback of at least a portion of the audio progress length of the audio content at the determined speed of the audio content playback through the speaker during the capture duration, wherein at least a first duration of the music is played through the speaker during the capture duration;
• capture the visual content during the capture duration at the speed of the visual content capture with the playback of the at least the portion of the audio progress length of audio content through the speaker, the visual content having a visual progress length based on the capture duration, wherein the image capture device internally tracks timing of the audio content playback during the capture duration, wherein the internally tracked timing of the audio content playback is matched to timing of when the visual content is captured by the image capture device;
• synchronize the visual content captured during the capture duration with the at least the portion of the progress length of the audio content based on the matching of the internally tracked timing of the audio content playback to the timing of when the visual content is captured by the image capture device;
• and
• generate a video file including the visual content, wherein the first duration of the music that is played through the speaker during the capture duration is copied from an original music file for the music to the video file.