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In telecommunication, a standard test tone is a pure tone with a standardized level generally used for level alignment of single links and of links in tandem. [1]For standardized test signal levels and frequencies, see MIL-STD-188-100 for United States Department of Defense (DOD) use, and the Code of Federal Regulations Title 47, part 68 for other Government agencies.
Has PCM "Sound Effect" section. When used as a MIDI tone generator, 30 tones are available, as per the CT-460. [190] MT 600 1987 49 mini 40 8 D (x6) MIDI Preset-only home version of Casio's Spectrum Dynamic (SD) synthesizers. [194] [190] MT 640 1988 49 mini 210 10 D (x6) MIDI MIDI in/out only (no thru). [195] MT 750 1989 61 mini 220 12 D (x6) MIDI
Sega Melody Generator 1981 1 Sega G80 arcade system board [24] Sharp Corporation: Sharp LR35902: 1989 4 Game Boy, Game Boy Color, Game Boy Advance: In Game Boy Advance, it's used for Game Boy/Game Boy Color mode and supports software-mixed PCM as a secondary function. [25] Sharp SM8521 1997 1 Game.com: Noise generator Sunsoft: Sunsoft 5B: 1992 3
The lowest series has adjacent tones that are roughly in the harmonic ratio of 2 0.05 to 1 (≈1.035265), while the other two series have adjacent tones roughly in the ratio of 10 0.015 to 1 (≈1.035142). An example technical description can be found in a Philips technical information sheet about their CTCSS products. [7]
The E-100 series was a cost-reduced version of the A-100 introduced in 1965, with only one set of drawbars per manual, a reduced number of presets, and a slightly different tone generator. [62] This was followed by the H-100 series, with a redesigned tonewheel generator and various other additional features. [58]
Some non-mel auditory-frequency-scale formulas use the same form but with much lower break frequency, not necessarily mapping to 1000 at 1000 Hz; for example the ERB-rate scale of Glasberg and Moore (1990) uses a break point of 228.8 Hz, [15] and the cochlear frequency–place map of Greenwood (1990) uses 165.3 Hz.
The rest of the combination tones are octaves of 100 Hz so the 7:5 interval actually contains four notes: 100 Hz (and its octaves), 300 Hz, 500 Hz and 700 Hz. The lowest combination tone (100 Hz) is a seventeenth (two octaves and a major third) below the lower (actual sounding) note of the tritone. All the intervals succumb to similar analysis ...
A model C organ with factory supplied chorus generator D-100: 1963–1969 [18] Internals of an RT-3 with built-in amp and speakers E: 1937–1949 [19] The first Hammond Organ with a 32-note American Guild of Organists (AGO) pedalboard. Also included toe pistons, a Great to Pedal coupler and separate Expression Pedals for Swell and Great Manuals ...