Yamaha MO8 Owner's Manual - Page 134

Basic Structure Internal Structure (System Overview) ● Amplitude [VOICE] ➞ Voice selection ➞ [EDIT] ➞ Element selection/ Drum Key selection ➞ [F4] AMP This unit controls the output level (amplitude) of the sound output from the Filter block. The signals are then sent at this level to the Effect block. Also, by setting the AEG (Amplitude Envelope Generator), you can control how the volume changes over time. AEG (Amplitude Envelope Generator) Using the AEG, you can control the transition in volume from the moment the sound starts is to the moment the sound stops. You can create the AEG by setting parameters as illustrated below. When you press a note on the keyboard, the volume will change according to these envelope settings. Furthermore, different AEG parameters can be set for each Element or each Key. Level (Volume) Attack Level Initial Level Decay1 Level Sustain Level (Decay2 Level) 0 Attack Time Decay1 Decay2 Time Time Release Level Release Time Time Pressing the key (Key on) Releasing the key (Key off) ● LFO (Low Frequency Oscillator) [VOICE] ➞ Voice selection ➞ [EDIT] ➞ Element selection/ Drum Key selection ➞ [F5] LFO [VOICE] ➞ Voice selection ➞ [EDIT] ➞ [COMMON] ➞ [F5] LFO As its name suggests, the LFO produces a wave of a low frequency. These waves can be used to vary the pitch, filter or amplitude of each Element to create effects such as vibrato, wah and tremolo. LFO can be set independently for each Element; it can also be set globally for all Elements. Single Timbre Tone Generator (Voice/ Performance mode) and Multi-timbral Tone Generator (Song/Pattern mode) The internal tone generator block operates in two different ways (Single timbre and Multi-timbral) depending on the selected mode. The difference between the two is whether or not they can handle multiple MIDI channels at the same time. ● Single Timbre Tone Generator (Voice/Performance mode) A MIDI tone generator that receives over a single MIDI channel and plays a single instrument part is referred to as a "single timbre" tone generator. This is the operating status of the internal tone generator in the Voice and Performance modes. n To set the MIDI receive channel for single timbre operation (Voice and Performance modes), use the following operation in the Utility mode. [UTILITY] → [F5] MIDI → [SF1] CH → BasicRcvCh ● Multi-timbral Tone Generator (Song/Pattern mode) A MIDI tone generator that simultaneously receives over multiple MIDI channels and plays multiple instrument parts is referred to as a "multi-timbral" tone generator. This allows playback of multi-channel MIDI song data-such as on a MIDI sequencer or computer-with each internal part being assigned to and played by a different track or channel. This is the operating status of the internal tone generator in the Song and Pattern modes. n To set the MIDI receive channel for multi-timbral operation (Song and Pattern modes), use the following operation in the Utility mode. [SONG] or [PATTERN] → [MIXING] → [EDIT] → Part selection → [F1] VOICE → [SF2] MODE → ReceiveCh n When using an external MIDI sequencer or computer to play this instrument, make sure to use the Song mode or Pattern mode. Maximum Polyphony Maximum polyphony refers to the highest number of notes that can be sounded simultaneously from the internal tone generator of the instrument. The maximum polyphony of this synthesizer is 64. When the internal tone generator block receives a number of notes exceeding the maximum polyphony, previously played notes are cut off. Keep in mind this may be especially noticeable with Voices not having decay. Furthermore, the maximum polyphony applies to the number of voice elements used, not the number of voices. When the normal voices that include up to four elements are used, the maximum number of simultaneous notes may be less than 64. 134 Owner's Manual