<https://forums.musicplayer.com/topic/1864-violin-vibrato/#comment-27351>
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"Where guitar vibrato goes across the fretboard, a violin vibrato goes parallel to it. This is due to the fact that since a guitar has frets, doing a vibrato parallel to the fretboard won't have as much effect as going across it. But you can do it on a violin. \n&#13;\nVibrato of any kind takes patience to master. Keep working at it!"
<https://forums.musicplayer.com/topic/1864-violin-vibrato/>