Yamaha Dx7 Service Manual

							it takes until Ll is reached from L4. The larger the Rl value, the sharper the attack.
Rates and levels determine the basic shape of the envelope, but the actual envelope shape is
affected by output level and key scaling.
3. Output Level Buffer
Output level buffer receives data concerning key scaling, after touch, and output level from
the CPU. Actual values used for Ll to L4 are determined by the data stored in this buffer.
Key scaling changes the output level as shown below.   
						

							4. Frequency Buffer
Frequency data related to key code, pitch envelope, and transposition is received from the
CPU and stored in the frequency buffer.
5. Rate Scaling Buffer
Data used to determine rate values according to key scaling is stored in the rate scaling
buffer.
6.Values used for Rl to R4 are determined by the data stored in the frequency and rate
scaling buffers.
7. Key Event Buffer
Key states (ON/OFF) are stored in the key event buffer.
8. Modulation Sensitivity Buffer
Amplitude modulation sensitivities are stored in the modulation sensitivity buffer.
9. Envelope Modulation Buffer
Modulation states of the LFO are stored in the envelope generator buffer.
10.Envelope produced by the envelope generator is modulated by the data stored in the
modulation sensitivity and envelope modulation buffers to generate the final
envelope.
11. Detune Buffer
Detune data according to key scaling is stored in the detune buffer.
12. Pitch Modulation Buffer
LFO pitch modulation data is stored in the pitch modulation buffer.
13. Pitch Ratio Buffer
Pitch ratios are stored in the pitch ratio buffer.
14.Data in the frequency buffer is modulated by the data stored in the detune, pitch
modulation, and pitch ratio buffer to generate frequency data.