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| 21-04-08 / 01:16 : Roland D20 / MRC sequences (cjed) |
 The Roland D20 sequencer uses 2DD disks (2HD can be used by masking the hole) and sequence files are in MRC format (.SVQ extension). This was the format (MRC Pro) of the MC500 and MC50 hardware sequencers (and later MC50mkII and XP workstations).The MC50mkII can read D20 disks and play or export them in order to convert them to Midifile format. It also allows to compose without a computer and can chain songs without pause (direct from disk). We can found the official user manual on the Roland , site or at Safe Manual (non official scans). This hardware sequencer can be found around 120$ (used), and can be handful when experiencing a bug in the D20 sequencer while sending midi sequence data through the midi out (tracks muted) : sometimes the pedal hold off are ignored (and later pedal hold off and hold on messages aren't played). It can be fixed temporarly by muting/unmunting quickly the tracks. Giebler company provides at 55$ the Roland MC package, that includes Roland Diskette Manager and MC-50 Sequencer Conversion Software. These softwares (DOS only) allow to read Roland disks (MC50/500mkII, and probably Roland D-20 ones) and to convert the MRC sequences files to midifiles. A PC with a floppy disk drive (not USB) is required. The drive BIOS compatibility can be checked here. |
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