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Anleitung Roland, modell VK-88

Hersteller: Roland
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Fotos und technische Daten  Roland  VK-88
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Anleitung Zusammenfassung


The virtual tonewheel sound generator of the VK-88 is also producing sound constantly, allowing very rapid response when you play a note. This rapid response is especially valuable when you use characteristic organ performance techniques such as glissando. The organ sound consists of a fundamental and eight harmonics, and these are mixed according to the combination of the harmonic bars. You can use the harmonic bars to modify the tone even while you play, allowing a high degree of expressive flexibility. Percussion Tone wheel percussion is used when you want to add an attack to the notes you play, making the sound more crisp. Relative to the pitch of the note you play, you can specify either the second (SECOND) or third (THIRD) partial as the pitch of the percussion sound, and you can decrease the percussion volume (SOFT) or lengthen its decay (SLOW). The percussion on tone wheel organs is of a type called “single-trigger,” meaning that percussion was not applied to all the notes that were played, but only to the note that was pressed first. If you release the currently-played key(s), percussion will sound for the next-played note. If you play legato (with notes smoothly connected), percussion will be applied only to the first note, and not to subsequent notes. If you play staccato, percussion will be applied to all notes. If you play rapidly when using percussion, the percussion circuit may not keep up with your playing, causing the percussion sound to become softer. However, the VK88 allows you to adjust the speed of recovery so that it will keep up even with rapid playing (p. 67). On a tone wheel organ, the way in which percussion is applied is a very important element in enhancing the expressiveness of the performance. On tone wheel organs, the 1' harmonic bar was used to produce the percussion sound. This means that when you add percussion, the sound of the 1' harmonic bar will no longer be heard. Also, percussion will be applied only to the Upper Part. On tone wheel organs, turning off percussion [SOFT] button would lower the volume of the organ, but the VK-88 allows you to adjust it so the volume of the organ won’t change when percussion [SOFT] button is switched on/off (p. 67). Key Click The first generations of traditional tone wheel organs produced a “blip” noise (separately from percussion) when a note was pressed or released. Initially, this click noise was considered a problem, but blues and rock musicians came to utilize it in their performances, and the key click became an indispensable part of the organ sound in jazz as well. On the VK-88 you can independently adjust the volume of the key click for key-on and key-off (p. 82). How the VK-88 Works Vibrato and Chorus Traditional tone wheel organs provided a total of six different effects: three kinds of vibrato (V-1, V-2, V-3) and three kinds of chorus (C-1, C-2, C-3). Vibrato is an effect that cyclically modulates the pitch, and chorus is an effect that modulates the pitch to produce spaciousness and depth. Harmonic Bars The harmonic bars of a tone wheel organ are arranged in ascending order of pitch, from left to right. Borrowing some inspiration from the pipes of a pipe organ, the bars are labeled in “feet,” with 8’ being the fundamental. There is one exception in the ordering of the harmonic bars, and that is the 5-1/3’ bar located second from the left. According to the pitch order, this should be the third from the left, but since 5-1/3’ is an overtone of 16’, and blends with the 16’ sound, it is placed beside the 16’ bar. The harmonic bars are color-coded in three colors. The bars whose pitches are in octave relation to 8’ are white, the bars that are not octave harmonics are black, and the lower pitch range is brown. On tone wheel organs, the highest feet were repeated (“reused”) in the high keyboard range, and the lowest feet were repeated in the low range. This is called “fold-back.” If an organ had 109 tone wheels, all nine harmonics of the harmonic bars could be sounded by all 61 keys of a tone wheel organ. However, if this were the case, the upper range would be unpleasantly screechy, and the lower range would be excessively low and muddy-sounding. For this reason, fold-back is used on the VK-88 to produce a well-balanced sound. Amp Type (Rotary, Overdrive, Tone) The VK-88 features four different amp types, reproducing everything from warm tube sound to the cabinets’ sonic characteristics. Even if you are using a keyboard amp or monitor speakers, amp modeling gives you the sound of an actual rotating speaker or a guitar amp sound, allowing you to enjoy performing with a wider variety of sounds. What’s more, you can make settings for the rotary speaker volume, for the time used in switching between the fast and slow rotation speeds, as well as the fast and slow rotation speeds themselves, and separate tweeter and woofer settings for a greater sense of breadth in the sound. Reverb Reverb is an effect that adds reverberation to the so...


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