▁appeal ▁to ▁am ateurs ▁and ▁h ob by ists , ▁and ▁focused ▁on ▁mini atur ization , ▁afford ability , ▁and ▁simplicity . ▁The ▁company ▁went ▁on ▁to ▁have ▁a ▁big ▁impact ▁on ▁popular ▁music , ▁and ▁did ▁more ▁to ▁shape ▁electronic ▁music ▁than ▁any ▁other ▁company . ▁ ▁At ▁Roland , ▁he ▁continued ▁his ▁work ▁on ▁the ▁development ▁of ▁drum ▁machines . ▁Roland ' s ▁first ▁drum ▁machine ▁was ▁the ▁Roland ▁TR - 7 7 , ▁released ▁in ▁ 1 9 7 2 . ▁After ▁K ake hash i ▁realized ▁micro process ors ▁could ▁be ▁used ▁to ▁program ▁drum ▁machines , ▁Roland ▁launched ▁the ▁CR - 7 8 , ▁the ▁first ▁micro processor - dri ven ▁program m able ▁drum ▁machine , ▁in ▁ 1 9 7 8 . ▁These ▁ 1 9 7 0 s ▁Roland ▁drum ▁machines ▁were ▁used ▁in ▁disco , ▁R & B , ▁rock ▁and ▁pop ▁songs ▁from ▁the ▁early ▁ 1 9 7 0 s ▁to ▁the ▁early ▁ 1 9 8 0 s . ▁ ▁During ▁the ▁ 1 9 8 0 s ▁and ▁ 1 9 9 0 s , ▁Roland ▁released ▁several ▁instruments ▁that ▁have ▁had ▁a ▁last ing ▁influence ▁on ▁popular ▁music . ▁Roland ▁launched ▁the ▁TR - 8 0 8 , ▁the ▁first ▁fully ▁program m able ▁drum ▁machine , ▁in ▁ 1 9 8 0 . ▁K ake hash i ▁deliber ately ▁purchased ▁fault y ▁trans ist ors ▁that ▁created ▁the ▁machine ' s ▁distinct ive ▁" s izz ling