Eventide Harmonizer H910, Instruction Manual

Page 1: ...Eventide the next step MODEL H9IO HARMONIZED INSTRUCTION MANUAL EVENTIDE INC ONE ALSAN WAY LITTLE FERRY NEW JERSEY 07643 201 64M200 710 991 6715 J ...

Page 2: ...o Feed 10 Sound Reinforcement 10 Reverberation 11 Pitch Tempo Variation 11 Retuning Tracks H Length Change H Multiple Ratio Adjustments 11 Live Performance Use 11 Use of Feedback 12 Pitch Ratio Readouts for Musical Relationships 13 HK940 Keyboard for Eventide Harmonizer 14 Interconnection of keyboard and up to three Harmonizers 15 TECHNICAL INFORMATION SEE SEPARATE SECTION EVENTIDE HARMONIZER mode...

Page 3: ...Extends 22 86cm 9M behind panel 115VAC 50 60HZ 5 or 230VAC 5G 60Hz Nominal power dissi pation 25 watts The HK94Q keyboard is available to control the H910 Harmonizer This is a two octave keyboard C to C and each key corre sponds to its associated musical interval With this unit one can play various harmonies in real time If the keyboard is ordered with polyphonic capability option 06 it may be use...

Page 4: ...reverb and echo Two outputs are available each with a variable delay which allow for vocal multiplying distributing speaker systems especially useful for PA work and even more effects ANTI FEEDBACK Feedback caused by energy buildup due to room resonance is decreased by shifting successive repetitions of the same signal away from the resonant frequency The H91Q incorporates a control which periodic...

Page 5: ...T 10K phase INPUT 10K phase INPUT phase INPUT phase 12 Chassis Ground Chassis Ground REAR VIEW OF TERMINAL STRIP ON REAR PANEL OF HARMONIZER If the Harmonizer Is equipped for use with the optional Key board additional connector s will be provided Refer to the Instructions on pages 14 and 15 INTERFACE MODES Voltage control of It Is possible to remotely control the Harmonlzer pitch Pitch Ratio ratio...

Page 6: ...ontinues to operate even in the DELAY ONLY mode This is of advantage because it permits one to set a pre cise ratio and then switch from normal to that ratio without going into the PITCH CHANGE mode To adjust the external control voltage range remove the Har monizer top cover and swing the top board up on its hinges The adjustment labelled CV ADJ is a small trim resistor located about 3 cm behind ...

Page 7: ... practices should be followed when connecting the Harmonizer In the balanced configuration option 03 terminal strip pins 4 7 and 12 are all grounded and there is a DC path connecting these pins tn the unbalanced configuration standard pins 6 9i and 11 are also connected to the same DC ground Nonetheless the grounds should be connected insofar as possi ble as described in the table Thls will help p...

Page 8: ... program radio Integrated program live Voice tal king Piano Guitar acoustic Guitar fuzz Synthesizer Organ Drums LIMIT INDICATOR DUTY CYCLE once per two seconds once per second once per two seconds 2 3 per second 2 per second 1 per second infrequent infrequent once per beat Remember the above is a general guideline The ear is the best measuring instrument around and the best setting Is one at which...

Page 9: ... switch becomes Illuminated and the legends beneath the ADD L DELAY switch group become relevant When the DELAY ONLY switch is in the out position the LED INDICATOR adjacent to the PITCH CONTROL SELECT switch group becomes illuminated and the two right hand buttons In the ADD L DELAY group are the only ones activated In this case the legends above the switches are relevant This switch group contro...

Page 10: ...ape speed should be set to the reciprocal of the readout multi plied by the base frequency such as 60Hz example The PITCH RATIO READOUT shows 1 30 which corresponds to an Increase of about 5 musical intervals To find the osc illator frequency to reduce this to normal pitch assuming a 60Hz synchronous motor multiply hOHzXl 1 3Q j 6 1 5Hz A similar procedure may be used to calculate time speed up or...

Page 11: ...ignals added together recreate the original Input and cancel the delayed signal yet the illusion of stereo very convincing The outputs will appear as two in the frequency domain with the As the input frequency shifts vary from the left to the right compatibility problems as j s 7 5ms and perhaps as much as 15ms of delay can be added to one side of one or more instruments in a stereo or quad mixdow...

Page 12: ...CH CHANGE UNUSED A common problem in sound reinforcement is caused by the slow propagation velocity of sound in air Assuming a room or auditorium 100 feet long with a lecturer or singer at one end how does one get the sound to the other end without echoes For good coverage speakers could be placed say at 40 feet and 70 feet from the end but a listener near the end of the roorr would hear sound fro...

Page 13: ...racks There are numerous occasions when radio stations must vary the length of recorded material An editorial may have to be fit Into a time slot a conmercial may be 63 seconds long J etc Using the Harmonizer In conjunction with a tape recorder speed control or VSO allows one to correct length without changing the pitch of the recorded material In certain c i resistances particularly in film work ...

Page 14: ...mall many repetitions can occur before the original signal is out of the frequency band avallable if for Instance the ratio is set at one inter val about 1 0b putting a tone into the input generates an equally tempered scale which is output sequentially The time between the notes is determined by the delay setting and the amplitude between successive notes is determined by the feed back amptitude ...

Page 15: ... 4557 1 5422 1 6339 K7311 1 8340 1 9431 I 0443 1064 1 1722 1 2419 1 3157 1 3939 1 4768 I 5646 1 6577 1 7563 1 8607 1 9713 PITCH CHANGE The Eventide Harmoni2er and 1745M Delay Line with Pitch Change Module may be used to generate musical harmonies by reference to the above table Because a digital compression or stretching process is used all harmonic relatlonships are preserved unlike the disharmon...

Page 16: ... C in the absence of any key depression No music is generated in the keyboard Your music passing through the Harmonizer is pitch changed on Instruction from the keyboard The keyboard Harmonizer combination can be used as a musical Instrument if the Harmonizer Input is supplied with middle C approximately 2b0 cycles of the waveform or timbre you require The keyboard is basically an electronic cltic...

Page 17: ...izer front panel H94f Select KEYBOARD control mode on Harmonizer front panel 2 Harmonizer 2 or 3 with poly keyboard a For H910 Harmon Izers only If Harmonizer has a keyboard socket this must be disconnected from H3 and M4 and shorting plug replaced on M4 observe polarity I If you have lost the shorting plug the two pins to be shorted together are counting the pin nearest the front panel as 1 pin t...

Page 18: ...gone off The distortion meter should read lower than 3 If a second output is installed measure Its distortion It should be lower than 3 and within of that of the first output There should be no change in distortion reading Listen to see If any periodic noise has been added to the signal Key the audio tone and confirm that a reverb like decay Is present when the signal Is off Set DELAY to zero pi a...

Page 19: ...ve memory or conversion circuitry If analog problem refer to alignment procedure Check digital to analog converter circuitry and delay setting circuitry Check 6pin ttolex connectors to front panel If digital distortion results check memory addressing logic circuitry Jf no output Is present check phase locked loop operation If the pitch ratio is not variable over the full range refer to the phase l...

Page 20: ...eat steps 6 7 and 8 if significant adjustment was made in any of those steps EXPANDER 1 Set Harmonlzer controls for zero delay in the DELAY ONLY mode 2 Apply a 1kHz signal and adjust the LEVEL control so that the LIMIT LED is just on the threshold of Illumination 3 Adjust the Expander Level control until the level at the output ter mlnal is 16 volts peak to peak A Adjust the HF Dist control to obt...

Page 21: ...ch OUT Apply a Adbm lkHz signal and observe the Harmonizer audio output while triggering the oscilloscope on the input signal Adjust the PW trim pot until the display appears stationary Indicating non varyjng delay 2 3 4 5 6 2 3 4 Control Voltage Mode 1 Select CV mode 2 Apply maximum desired control voltage to remote C V input 3 Adjust C V ADJ trim pot for a measured frequency of 67kHz HD 3 0 DIGI...

Page 22: ...he factory If Option 03 balanced in out transformer coupling is supplied the transformers are mounted on the HA920 board The various front panel control potentiometers AC power connector and power supply regulators are connected to the HA 20 board by wire harnesses and removable connec tors CIRCUIT DESCRIPTION ANALOG BOARD HA920 This assembly contains components and printed circuitry to perform th...

Page 23: ...rates a OC signal proportional to this level over a wide dynamic range The DC signal is fed back to the VCA in such a proportion that for each lOdb Increase in Input signal level the VCA gain is decreased by Sdb This results in a 2 1 compress Ion ratio The Compressor module 1s ident1 cal to the Expander module and in fact Is Interchangable with It They differ In operation by means of external conn...

Page 24: ...IC 9 on and off changing the gain of the op amp from 1 to 1 and consequently the polarity of the offset voltage The result of this operation is a slight frequency modulation of the audio signal Proper operation of the ant I feedback circuit requires that the output pulses of the two monostable multivibrators be of equal widths Trim pot PW adjusts the pulse width In the Keyboard mode IC 7 is employ...

Page 25: ...reading data out at either a faster increased pitch rate or a slower decreased pitch rate In the DELAY ONLY mode the pitch ratio is unity and so the read rate is equal to the write rate The read rate Is determined by signal FIN whclh is equal to the system synchronous signal FREF in the DELAY ONLY mode and asynchronous phase locked loop output signal FPLL In the pitch change mode IC s 4 6 and 7 fo...

Page 26: ... the metric 1000 The memory array organization is 10X4KM with M0 storing the least significant bit 00 and M9 storing the most significant bit D9 of each data word The address and write enable lines of all ten RAM s are connected in parallel IC 13 is a CMOS hex buffer which drives the chip enable CE lines one section of the buffer for each pair of RAM3 s The outputofi the comparator COMP is applied...

Page 27: ...umber of FPLL pulses accumulated during the Interval are transferred to an internal latch by control signals generated Dy IC 5 The counter Is then reset along with 103 and half of 104 bv another control signal from 105 The second half of IC 4 divides FPLL by SOrt t f FPLL nd FftEF are e lual a count of 100 Is accumulated In t ir J nd cat n9 a pitch ratio of 1 1 The data stored in the output latch ...

Page 28: ...tion problem is with that output The photographs show serious mlsalign ment Slight alignment errors will not be visible but will show up with dis tortion measuring equipment Noisy signaI frying sound11 Mgranu Tar i tyJI Note difference in bottom trace One or more of the less significant bits missing from the output Indi cates possible bad memory 1C if both outputs bad or defective output latch or ...

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Page 31: ...hDQIQ TOPOLOGY TMNG AND COMTROI IQGir REFERENCE GENERATOR ...

Page 32: ...I IMINC r m CONTROL LOGIC ...

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Page 43: ...CT NC NUT CONNECTED TYPICAL OF MANY MANUFACTURERS BLOCK DIAGRAM 1 1 E CJ 1 w A At A A A A A40r tf AD A5 r L 3 u READ CYCLE Parameter Mrm Max Condition tflCY Raid Cycle Time 690 m tj 20ns lCER CE On Tima During Read 400 3000 m lCO CE Output Daisy 400 fit Cfcgjj 50pF Load One TTL Gate Rtf 2 0V for High O V for Ltwir tacc Address To Output Access 420 ns WL CE to WE 0 ns tacc ac Tco ity WE toCE on 0 n...

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Page 45: ...ensation high common mode range and exceptional temperature stability The pA74l is short circuit protected and allows for nulling of offset voltage 1 diihi h L rf 2 Ifly Icp gt 3 Non Jft Input 4 V 5 Offui Null B Output 7 V May be replaced by TLOSl The j A710 is a High Spaed Differential Voltage Comparator featuring low offset voltage high sensitivity and a wide input voltage range It is ideally su...

Page 46: ...CKAGE I Bottom View CM i C nncctmd To gf uAd 123 M7800 SERIES A7ai5 ts V GENERAL DESCRIPTION The nA7800 senes of Thr e 7errrnnaJ Positive Voltage Regulators are consTrutTetJ LJ Irtg I he Fairchild Planar epdaxiel process These regulator employ internal currer 1 limning Thermal shutdown and safe area compensation making hem essentially blOw out proof U adequate heat sinking is provided they can del...