Of course you could manage a better Ram/CPU ressources by disabling the screen display, yet this can't allows the use of the computer as a direct Musical instrument/mixing station.
(But, there are PLAYlist utils see AYCplayer -[[AYC]]-)
*ZX spectrum 128 and +2 and +3 were all supplied with 128Ko Ram while CPC/Plus ranges still included 64ko Ram computers (464-664).