INTRODUCTION਀ In terms of electronic drum technology, the SDS 7 is a significant step forward in four areas.਀ (a) sound generation਀⠀戀⤀  瀀爀漀最爀愀洀洀愀戀椀氀椀琀礀 (c) selectability of programmes਀⠀搀⤀  瀀氀愀礀愀戀椀氀椀琀礀 ਀䤀渀 琀栀椀猀 洀愀渀甀愀氀Ⰰ 攀愀挀栀 漀昀 琀栀攀猀攀 愀爀攀愀猀 愀爀攀 搀椀猀挀甀猀猀攀搀 椀渀搀椀瘀椀搀甀愀氀氀礀Ⰰ along with chapters covering the subjects of ਀甀渀瀀愀挀欀椀渀最Ⰰ  setting up, ਀挀漀渀渀攀挀琀椀渀最 甀瀀Ⰰ technical specifications and a discussion about ਀瀀爀漀最爀愀洀洀椀渀最 琀攀挀栀渀椀焀甀攀猀⸀ ਀吀栀攀  爀愀渀最攀 漀昀 猀漀甀渀搀猀 愀瘀愀椀氀愀戀氀攀 昀爀漀洀 琀栀攀匀䐀匀 㜀 椀猀 瘀椀爀琀甀愀氀氀礀 椀渀昀椀渀椀琀攀Ⰰ from acoustic drum and cymbal sounds to the now characteristic਀∀匀椀洀洀漀渀猀∀ 猀漀甀渀搀猀 愀渀搀 漀甀琀爀愀最攀漀甀猀Ⰰ 瀀攀爀猀漀渀愀氀氀礀 猀琀爀甀挀琀甀爀攀搀 瀀攀爀挀甀猀猀椀瘀攀 攀昀昀攀挀琀猀⸀ ਀刀攀愀搀 漀渀⸀�