Yamaha DX7 Product Manual - Page 38
Tor-frequency Coarse] And Use Data
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Then slowly move this slider up and down fully, or use these buttons while continuing to play a note 7. Press [OSCILLATOR-FREQUENCY FINE] again, too high to be audible on all but the lowest notes of 33 and slowly move the (DATA ENTRY] slider all the the keyboard. way up. The increments you get with the Fine adjust- 8. Slowly bring the [DATA ENTRY] slider all the way ment will depend on the beginning Coarse setting. down so the pitch returns to a ratio of 2.00. Then The pitch change will seem continuous when the press [OSCILLATOR-FREQUENCY COARSE] and Fine adjustment is selected and you move the [DATA then the [-1] DATA ENTRY button to reset the ratio to ENTRY] slider, rather than discretely stepped, as it 1.00. (This should now be identical to the "starting" does with the Coarse setting. initialized voice.) 6. Slide [DATA ENTRY] all the way down so the fre- quency returns to 1.00, and then press [OSCILLATOR-FREQUENCY COARSE] and use DATA ENTRY [+1] to set the frequency ratio to 2.00. If the ratio does not quite reach 3.98 when you push the slider up, press the increment button [>] once or more. Notice the maximum increase available with the Fine frequency adjustment is always a little less than twice the beginning Coarse frequency The "Fine" control multilplies the "Coarse" value by up to 1.99. For example, if you start at a ratio of 1.00, the Fine adjustment will go only as high as 1.99 (just under twice 1.00). Start at 2.00, and the Fine adjustment will go only as high as 3.98. Start at 3.00, and the Fine adjustment will go only as high as 5.94. Start at 31.00, and Fine will take you up to 61.69. Thus you can use a combination of Coarse and Fine adjustments to achieve anywhere from 1/2 the "normal" keyboard pitch to nearly 62 times that frequency - which is How to create Frequency Modulations getting acquainted with the OPERATOR SELECT, OUTPUT LEVEL and ON - OFF edit featurec Up to now you have manipulated only OPERATOR 1 which, in ALGORITHM 1, happens to be a carrier. We'll now leave Operator 1 set at the "square" envelope at a frequency ratio of 1.00 (as initialized), and begin exploring what happens when Operator 2 is used to modulate Operator 1. For review, we again point out the Operator On/Off display (which you are about to use) and illustrate Algorithm 1, but with additional information you may now begin to understand. NOTE If you 're "lost" or if it has been a while since you read and followed the instructions in the previous sections, you can start "from scratch" here by pressing [FUNCTION], then [VOICE INIT], then answering [YES] [YES]. The DX7 will now be set as we assume it is for the following instructions. The display however, may not match: if a different editing parameter is shown, press [OSCILLATOR-FREQUENCY COARSE]. Now your diplay should match the following illustration. Remember the display of 6 1 's tell you the corresponding 6 operators are turned ON at this point in the programming process. The On/Off "switches" are shown in the following algorithm diagram.