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The Roland XP-50 is a music workstation that combines the synthesizer engine of Roland's JV-1080 sound module with the sequencing capabilities of their MRC-Pro sequencer and a 61-note keyboard. First released in 1995, the XP-50 and the Roland XP-10 were the first two Roland XP-series products, later joined by the XP-80 and XP-30. ==Sound Engine== The XP-50's sound engine utilizes a custom 32-bit RISC chip to accommodate its sound generation and effects processing. There are 640 patches and 128 performances on board. The XP-50's internal memory includes 512 waveforms, which can be expanded with up to four user-installable SR-JV80 expansion boards. Presets include a General MIDI soundest, and a wide selection of sounds, including ambient and techno sounds representative of the time of the XP-50's release. The sample + synthesissound engine's structure consists of "tones," each with a waveform, amplifier, filter, three envelope generators, and a pair of LFOs. Up to four "tones" can be combined in one of ten different "structures" or configurations to create a "patch." For multitimbral use, "patches" are slotted into "parts" to comprise a "Performance." Some of the more unique features of the XP-50's sound engine are frequency cross-modulation, tone delay variations, MIDI clock sync, high/low/band pass and peaking resonant filter options, and syncronizable LFOs. The XP-50 has 4 expansion slots which take any of the SR-JV series of cards. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Roland XP-50」の詳細全文を読む スポンサード リンク
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