FIELD: magnetic recording. SUBSTANCE: device has standard units and standard cassettes 29, which are adjusted to each other according to some standard. Standard cassettes are correctly located in standard units by means of at least one standard rod which enters standard hole 39 of standard cassette. Standard units are part of greater device which also has altered units 1 and altered cassettes 3, which are adjusted to each other in order to comply with altered standard. Altered units have at least one altered rod 21 which enters in altered holes 35A, B of standard cassette with space but it also enters standard hole 37A, B of standard cassette. Shape of altered hole 35 A, B does not allow for standard rod 41 to enter altered hole 35A, B. EFFECT: increased functional capabilities. 10 cl, 17 dwg
