Yamaha DX7 Product Manual - Page 33
the current operator. DO NOT PRESS ANY OTHER - initialize
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28 2. Assuming you want to initialize the voice edit mem- What is intialization? How to Interpret the display ory (buffer), answer affirmative by pressing [YES]. (If What have you just done? You have created a "blank" Now let's "decode" the display so you can understand you changed your mind and don't want to initialize a in a special memory called the editing buffer. That buffer the useful programming information being presented. voice, press [NO]; the display won't change, but the memory normally contains the same cartridge or inter- voice will not be initialized and you can select any nal memory voice you have selected to PLAY or EDIT other function you wish.) However, once you have "initialized" the editing buffer, it no longer contains the same information. Instead, it contains a special "initialized" voice. That voice is noth- ing more than a sine wave (a pure tone) which is either on or off. Remember there are 6 operators. Again, you can think of these as 6 individually pre-settable sine wave oscillators each with its own envelope generator that defines how the operator level changes when you play a note. In the "initialized" voice, all the operator's EG are set to produce an envelope with a "square" shape. That is, when you press a key to play a note, the operator (the sine wave carrier in this case) is on, and when you 3. The DX7 gives you one last opportunity to avoid wiping out any voice which you might have been creating by asking "are you sure you want to initialize the voice editing memory?" In this case you are sure, so answer [YES] again. (If you answer [NO], the display won't change, but the voice will not be initialized and you can select any other function you wish.) release the key and the operator is immediately off. Try playing a few notes and hear for yourself. All operators' output levels are set at 0 except operator 1, which is set at maximum output level (99). In this case, algorithm 1 is automatically selected by the initialization. This algorithm has 2 carriers and 4 modulators: operator 1 is a carrier (at the bottom of one stack). Because operator 1's output level is fully on, you can hear the sine wave it produces. You hear only a pure tone because the other operator's levels are at 0, effec- tively turning them off even though the operators are "available" because their envelopes are "on". Thus there is nothing to modulate operator 1, nothing to produce 4. The memory number in the LED display will be whatever had been last selected, but this has no effect here. Also, the particular operator displayed at the top right, and the editing parameter displayed on the the harmonics which might create various timbres. The pitch of each operator is set to frequency ratio mode at 1.00, so when you play a "C" you hear a corresponding pitch, as explained in one of the following subsections. There is no transposition, keyboard scaling, detuning of the operators, feedback, etc. In other words, all "enhancements" are turned off. Looking at the initial EG settings Since the envelope is one of the primary factors that you use to distinguish different sounds, we'll begin programming with the EG (envelope generator) parameters. 1. Press the [EG LEVEL] button, and observe the dis- play You can now examine and/or change one level at a lime in the envelope for whichever operator is the "current" operator. DO NOT PRESS ANY OTHER BUTTONS OR MOVE ANYTHING UNTIL YOU FOLLOW THE NEXT STEP. bottom line may vary because the DX7 will show the last used functions or settings. However, it will always initialize to algorithm 1 with all 6 operators enabled (turned on).