ページの作成:「You may use a standard stopwatch to measure the BPM and divide it by 4 to get the SPM. There's a special stopwatch model called DIGI DT-320 which within a special mode ca…」
(ページの作成:「You may use a standard stopwatch to measure the BPM and divide it by 4 to get the SPM. There's a special stopwatch model called DIGI DT-320 which within a special mode ca…」)