당신이 바라던 성장의 꿈, 이제 PC를 넘어 모바일에서도 느껴보세요. The Essential Guitar Guide. Key Chords. Key Chords is an interactive chord chart that allows you hear, see and arrange chords. - Click on a chord to preview how it sounds. - Drag and drop to arrange chords on the timeline - Tweak the settings to control the playback speed Or role the dice until you discover something that fits your mood.