Yamaha E1010 E1010 Owners Manual Image - Page 17

16 take 2mS (not 1mS) to come out of the unit. Hence, its pitch of a sound. The pitch of a sound changes only pitch is cut in half to 500Hz. At this point, if another when it is emerging from the E1010 output as the delay 1kHz wave is applied to the E1010 and no further delay time is being changed. As soon as a new delay setting is time adjustments are made, it will again take 1mS for fixed, the pitch of new sounds will not be changed. How- the wave to come out of the unit - still a 1kHz wave, ever, there is a way to preserve the changed pitch which but emerging 150mS after it entered. If the delay time occurred as the delay was changing - use FEEDBACK. is then increased from 150mS back to 300mS just as Suppose the FEEDBACK control is turned up and a another 1kHz wave is emerging from the E1010, that sound is applied to the E1010 input. Simultaneously, wave will take only 1/2mS to come out of the unit. Hence, its pitch is doubled to 2kHz. (Refer to Fig. 13.) How Vibrato is Obtained In the preceeding paragraphs we explained how pitch is changed by changing the delay time. If the DELAY control were turned up and down in a regular manner, a vibrato (rhythmic pitch change) would be produced. Try it. The E1010's MODULATION circuitry provides for automatic changes in delay time; DEPTH sets the amount of change and FREQUENCY sets the speed of the change. the DELAY control is moved up or down to change the pitch of a sound, and the control is quickly released. What happens? The pitch-changed output re-circulates through the delay unit, sustaining whatever pitch was reached when the delay time stopped changing. Now what happens if a new "normal pitch" input is applied? It goes through the delay and maintains its normal pitch, mixes with the sustained pitch-changed sound, and the two sounds sustain together until the feedback dies away. With a little practice, it is possible to play or sing the same note three times in quick succession, move the DELAY control during the first two notes, and How Lower and Higher Pitches actually create a triad. Can Be Sustained Together Consider how and when the E1010 changes the E1010 INPUT 0 Clock Pulses 20 E1010 OUTPUT Clock Pulses 20 1kHz Sine Wave Clock rate is slowed while signal emerges from E1010. 500Hz Sine Wave (A Pitch of Input Signal) 4mS k 8mS Clock Rate = 20kHz Clock Rate = 10kHz Fig. 13 - How changing the clock rate as a signal emerges from the E1010 changes the pitch. O FRONT O INPUT -30 dB REAR FOOT SWITCH hig input impedance 0 dB non.inverting 10dB BA non inverting BA INPUT VOLUME 10 dB inverting 9LEDs PEAK METER (input level) BA ***VOID*** 18 1 2 0 1 2 3 dB TONE CONTROL BASS 70Hz ±12 dB TREBLE 7KHz *12 dB OdEt inverting BA 040 inverting BA DIRECT / MIXING DELAY -12dB/o FEEDBACK Passive LPF OdB inverting BA f -13KHz -24 d B/oct SE= LPF COMPRESSOR EXPANDOR fc=13K Hz -24 dB/oct LPF iiI 10 15. 15Too"P m FET SWITCHES OPTIONAL OUTPUT DIRECT ONLY O, fV -20 dB FRONT OUTPUT -20 d8 r REAR 512 stage BBD (CPI (CP2 4096 stage BBD (CPI )CP2 fe-13KHz -24 dB/oct LPF fc=13K Hz -24 d B/oct LPF 4096 stage BBD CP1 CP2 fc=13KHz -24 B/oct LPF • 4096 stage BBD P1 CP2 fc=13KHz -24 dB/oct LPF 4096 stage BBD 1CP1 1CP2 DELAY OUTPUT FILTER +15 15 010 fc=13KHz -24 dB/oct LPF P.SW. FUSE POWER SUPPLY LED ON OFF ON GROUND 10 O75 11501225 O300 ? DELAY TIME RANGE MODULATION LEO FREQUENCY DEPTH VOLTAGE CONTROLLED CLOCK GENERATOR DELAY -- I BUFFER BUFFER BUFFER BUFFER BUFFER BUFFER BUFFER BUFFER CP1 CP1 CP1 CP1 CP2 CP2 CP2 CP2 • For U.S. and Canadian models only. Fig. 14 - E1010 Block Diagram