[Note: This is technical information for people who are interested in writing their own software to modify samples in the LSDj ROM images]
How The Sample Kits Are Laid OutEdit
Each sample kit is $4000 bytes long. The kits start at offset $20000 in the ROM image. All in all, there is space for 51 kits, of which kits 18-21 are reserved for the speech synthesizer.
Sample Kit ContentsEdit
Each sample kit can contain up to 15 samples.
When a kit is used, it is mapped to the memory area $4000-$7FFF...
ADDRESS CONTENT $4000 $60 $4001 $40 $4002-$401F Sample end addresses *) $4020 0 $4021 0 $4022-$404E Sample names **) $404F 0 $4050-$4051 N / A? $4052-$4057 Kit name (6 chars) $4058-$405B N / A? $405C Force Loop (1 bit/sample; samples 8–1) ***) $405D Force Loop (samples 15–9 (MSB not used)) $405E-$405F N / A? $4060-$7FFF Sample data (4 bits/sample point @ 11468 Hz, in chunks of 16 bytes) *) The end addresses specify the address of the first byte after the sample. So if the first sample is laid over the area $4060-$473F, the end address is $4740. If the sample is not used, set the end address to 0. The addresses are 16 bits long, stored in little-endian order (meaning: address $4250 should be stored as $5042 in memory). **) Each sample has a name of 3 chars. When entering a sample name with less than 3 chars, pad with '-'. For unused samples, fill in the sample name with null chars. ***) The force loop bit is used for sample kits, so that some vocals can be looped automatically: for example “aaaaaaa”