At last i managed to hear sound from roland mt-32 . I bought the real 'Hosa CMP-159 Mini to 1/4" Phone Stereo Breakout 10ft' (http://www.proaudiosuppliers.com/hosa-cmp-159.html) and i can hear the sound now. The sierra on line games like King's Quest, Space Quest etc have a lot better music quality with roland mt Thank you bunsen for your help