Man Speeds Up Acoustic Guitar Recording by 20 Times

May 31st, 2016


By Christopher Scapelliti

…And the result is amazing.

Steve-san Onotera, the self-described “Samurai Guitarist,” wanted to make a video of himself performing the Beatles’ “Here Comes the Sun” as the sun rose. In doing so, he learned something interesting about the sound of an acoustic guitar when you speed up a recording of it.

Onotera’s original plan was to record a video of himself outdoors at dawn, playing the song slowly, at seven bpm. This would give the finished recording a length of about 30 minutes—long enough for him to capture the sunrise. He then planned to speed up the video by 20 times so that it would play back at a more natural tempo of 140 bpm while producing a fast-motion sunrise. He also intended to re-record the guitar audio, performing the part at 140 bpm to make it sound normal and to eliminate the sound of the click track that he followed while making the original video.

But much to his surprise, the original seven-bpm guitar track sounded pretty interesting when sped up, like a string quartet playing staccato. So he abandoned his plan to re-record the audio track at 140 bpm and instead remade it at seven bpm, dubbing it while wearing headphones to prevent the click track from appearing on the final recording. The new recording captures not only the sound of his sped-up guitar but also that of crows, whose loud caws sound like small birds chirping on the sped-up recording.

You can view more of Onotera’s videos, including instructional guitar clips, on his YouTube channel.

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