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 and 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.