Yamaha DX7 Product Manual - Page 35
Rate 4. Press [EG RATE] 3 times so that Rate 4 - case
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30 With all levels at the maximum of 99 (except Level 4, which is at 0) and with Rate 1 at 25 instead of the 99 to which the other rates are set, the note builds up slowly when you press a key and turns off the instant you release the key If you could see the envelope, it would look something like this: 3. Press a key, wait for the note to build to maximum volume, release the key and observe how long the sound lingers. At the slowest rate (0), it takes about 3 minutes for the sound to decrease to complete silence. (You'll need to push the DX7 [VOLUME] slider up and/or turn up the volume of the amplifier in order to hear the last portion of-a long release time.) With all maximum levels at 99 (except Level 4), Rate 1 at 25 and Rate 4 at 25, the note builds up slowly when you press a key and turns off even more slowly when you release the key This points out an interesting fact about the DX7 envelope rates. Given any setting (25 in this case), the actual rate of change in level will be faster when the level is increasing, and slower when the level is decreasing. In other words, the actual rate is dependent on the relative levels. If you could see the envelope, it would look something like this: 2. To change the envelope so the sound gradually falls to silence when you release the key you must lower Rate 4. Press [EG RATE] 3 times so that Rate 4 appears in the display and then use [DATA ENTRY] to change the rate from 99 to 25. 4. To explore the middle of the envelope, press [EG LEVEL] until Level 3 is displayed, then adjust [DATA ENTRY] to obtain a Level 3 value of 80. When you now play a note, observe that it builds to a maximum value (L1 and L2=99), then instantly drops to a lower value (L3=80), where it will remain as long as you hold down the key. 5. The drop to Level 3 from the peak at Level 1 (which is the same as Level 2 right now), is very abrupt due to the fast setting of Rate 3. To slow it, press [EG