#eventideharmonizer

[zzzwiw]

If you are wondering how I make samples for SynthScaper app - https://motion-soundscape.blogspot.com #synthscaper #sounddesign #soundesigner #korg #poly800 #synth #synthesizer #homestudio #homerecording #tascam #portastudio #eventideharmonizer #roland #allenheath https://www.instagram.com/p/B0Xr8jZhMy4/?igshid=1055zhd2c82tq

[piscineatokyo]

. . Next on the bench is @mathieusbrodenius 's #Eventide #H910 #Harmonizer . Complete restoration is on order for this unit which came from the great land of Sweden 😊 . Among its issues: two of the four ganged switches (of the "Pitch Control Select" group) are broken, PSU is to be wholy rebuilt (of course), one digit on the display misses one of its bars (rendering some numbers hard to read), the machine has audio faults in the digital section (not surprisingly...), is out of alignment, and is presently missing the dbx card for the "Delay Only" output. . ...another H910 restoration project for the Good Doctor Prager: so stay tuned! 😉 . @eventideaudio @eventidefrance . #EventideInc #EventideAudio #H910Harmonizer #EventideH910 #EventideHarmonizer #EventideH910Harmonizer #VintageDigitalPitchShifter #VintageHarmonizer #VintageDigitalFXBox #EarlyDigital #Restoration #Repair #Fix #VintageElectronicsRestoration #ElectronicsRestoration #VintageElectronicsRepair #StudioPiscineATokyo #PiscineATokyo #LeBonDocteurPrager #TheGoodDoctorPrager https://www.instagram.com/p/BuyC5kNFmGZ/?utm_source=ig_tumblr_share&igshid=1bh1kc1ln2li8

[piscineatokyo]

. . And the series continue... . Still working on the same #Eventide #H949 #Harmonizer (from the @melodiumstudio in Montreuil): just found a faulty 74C08 (CMOS) AND gate that was clearly damaging the clock signal going to the DA converter section of the Main output... causing a slight but hearable harmonic distortion on this output when switching to the harmonizing function, necessarily the most used one on these machines! 😨 . Upper left picture shows the two clock signals (one for each digital audio fragment needed for the pitch-shifting effect): yellow trace is the B part, blue trace is the A part. They should have been identical, except in phase (they must only alternate in time)... Upper mid picture shows the analog waveform resulting from the sample&hold process, after DA conversion (that is, a 1 kHz sine, but jagged because unfiltered): blue trace is clearly not as clean as the yellow one... 😥 Upper right picture shows the output of the op-amp that mixes both waveforms into one: no wonder that the audio output was distorted! . After replacement of the offending chip (that my trusty #ABI #ChipMasterCompact #ICTester found faulty too, see center left pic), the clocks' waveforms now look perfectly clean, and so do the the individual analog A & B outputs, as well as the blending of the two! 👌😊 . [center right pic shows the original, Harris-made MM74C08N chip, replaced with a NOS National one from 1987] . @eventideaudio @eventidefrance . #EventideInc #EventideAudio #H949Harmonizer #EventideH949 #EventideHarmonizer #EventideH949Harmonizer #VintageDigitalPitchShifter #VintageHarmonizer #VintageDigitalFXBox #EarlyDigital #Repair #Fix #ElectronicsRepair #VintageElectronicsRepair #ABIChipMasterCompact #DigitalICTester #StudioMelodium #MelodiumStudio #StudioMelodiumMontreuil #MelodiumMontreuil #StudioPiscineATokyo #PiscineATokyo #LeBonDocteurPrager #TheGoodDoctorPrager https://www.instagram.com/p/BspnW9IlM9_/?utm_source=ig_tumblr_share&igshid=19pwvhnrkjixe

[piscineatokyo]

. . This is one frequent "Achille's heel" in the #Eventide #H949 #Harmonizer : an almost dead AD7531, one of the two 12-bit DA converters used on the outputs, on the upper digital board. . The one for the Delay Only output (of the H949 of the @melodiumstudio in Montreuil) was effectively distorting the audio at very low levels... and also added a somewhat perceivable background noise all the time 😔 . Now that it's been replaced by a new chip, distortion AND hiss have disappeared. Meaning that the dynamic range of the Delay Only output has returned to its full spec 😊👌 . @eventideaudio @eventidefrance . #EventideInc #EventideAudio #H949Harmonizer #EventideH949 #EventideHarmonizer #EventideH949Harmonizer #VintageDigitalPitchShifter #VintageHarmonizer #VintageDigitalFXBox #EarlyDigital #Repair #Fix #ElectronicsRepair #VintageElectronicsRepair #StudioMelodium #MelodiumStudio #StudioMelodiumMontreuil #MelodiumMontreuil #StudioPiscineATokyo #PiscineATokyo #LeBonDocteurPrager #TheGoodDoctorPrager https://www.instagram.com/p/BsoeiXQh0X0/?utm_source=ig_tumblr_share&igshid=5cs1mtrfrz4g

[piscineatokyo]

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. . @melodiumstudio 's #Eventide #H949 #Harmonizer is finally fixed and fully aligned: notably in and out levels, as well as the feedback path are now all consistent and back to normal 😊 (also corrected the displayed range of pitch shifting 😉) . The vintage digital FX box is ready to go home in Montreuil then 😉 . @eventideaudio @eventidefrance . #EventideInc #EventideAudio #H949Harmonizer #EventideH949 #EventideHarmonizer #EventideH949Harmonizer #VintageDigitalPitchShifter #VintageHarmonizer #VintageDigitalFXBox #EarlyDigital #Repair #Fix #ElectronicsRepair #VintageElectronicsRepair #StudioMelodium #MelodiumStudio #StudioMelodiumMontreuil #MelodiumMontreuil #StudioPiscineATokyo #PiscineATokyo #LeBonDocteurPrager #TheGoodDoctorPrager https://www.instagram.com/p/Bs7pUMAjCle/?utm_source=ig_tumblr_share&igshid=mfhhujhjd7zw

[piscineatokyo]

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. . Mr. @zdar_war testing his restored @eventideaudio #H910 #Harmonizer in the famous @motorbass studio in Montmartre, Paris. . He's looking particularly happy. Aren't you, Philippe? 😉😊👍 . ...and @pnantoine likes the 1977 FX box too, by the way 😊 . #EventideInc #EventideAudio #H910Harmonizer #EventideH910 #EventideHarmonizer #EventideH910Harmonizer #VintageDigitalPitchShifter #VintageHarmonizer #VintageDigitalFXBox #EarlyDigital #Restoration #Repair #Fix #VintageElectronicsRestoration #ElectronicsRestoration #VintageElectronicsRepair #Motorbass #MotorbassStudio #MotorbassRecordingStudio #MotorbassParis #PhilippeZdar #StudioPiscineATokyo #PiscineATokyo #LeBonDocteurPrager #TheGoodDoctorPrager https://www.instagram.com/p/BrFuY4LIDdY/?utm_source=ig_tumblr_share&igshid=1mcqm9t4yta2u

[piscineatokyo]

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. . @motorbass 's #Eventide #H910 #Harmonizer restoration (cont') . Last vid before moving on to some other unit to fix: looks like Mister @zdar_war 's machine is working... like a charm! 👌😊👍☺️😍 . #EventideInc #EventideAudio #H910Harmonizer #EventideH910 #EventideHarmonizer #EventideH910Harmonizer #VintageDigitalPitchShifter #VintageHarmonizer #VintageDigitalFXBox #EarlyDigital #Restoration #Repair #Fix #VintageElectronicsRestoration #ElectronicsRestoration #VintageElectronicsRepair #Motorbass #MotorbassStudio #MotorbassRecordingStudio #MotorbassParis #StudioPiscineATokyo #PiscineATokyo #LeBonDocteurPrager #TheGoodDoctorPrager https://www.instagram.com/p/BqF2iimhgTD/?utm_source=ig_tumblr_share&igshid=psmr6a8634nj

[piscineatokyo]

. . @motorbass 's #Eventide #H910 #Harmonizer restoration (cont') . In and out XLR adapter cables have also been professionally rebuilt with correct connecting blades for attaching them to the rear, old-fashioned terminals 😊 . #EventideInc #EventideAudio #H910Harmonizer #EventideH910 #EventideHarmonizer #EventideH910Harmonizer #VintageDigitalPitchShifter #VintageHarmonizer #VintageDigitalFXBox #EarlyDigital #Restoration #Repair #Fix #VintageElectronicsRestoration #ElectronicsRestoration #VintageElectronicsRepair #Motorbass #MotorbassStudio #MotorbassRecordingStudio #MotorbassParis #StudioPiscineATokyo #PiscineATokyo #LeBonDocteurPrager #TheGoodDoctorPrager https://www.instagram.com/p/BqFDxx5lwCw/?utm_source=ig_tumblr_share&igshid=kiu0cis1mfdv

[piscineatokyo]

. . A rather simple fix for a somewhat complex problem... . After having solved the +5V supply issue (see prev. post: tired diode bridge replaced with thermal paste added, as well as corresponding Molex connector redone, and reservoir caps replaced too) now this much loaded supply rail is clean and rock-solid 👌 . But there was still no sound coming out of the unit. Researches showed that was due to the rather "strange" path for the signal controlling the outputs of the FIFO chips (the ones mainly responsible for the pitch-shifting effect): this machine had a late revision board that prevented these chips to be activated, EVER!!! 🤔🤔🤔🤔 . I might have been missing something there, though there were absolutely NO evidence of any hand-made modification to any board re. this path... And, believe me, I DID check, recheck, double-and triple-check! But, until I discover why the Eventide engineers did reroute this control signal in this (undocumented and) weird way, after having scratched my f*cking head some full hours long, I decided to go back to the original, earlier board revisions' path with this technically very simple fix: it only involved removing a diode, lifting one chip's pin, and soldering it with a wire jumper to the anode pad of the former diode. . ...and the audio now comes out of the machine again!!! 👍👍👍 (see next Insta post 😉) . @eventideaudio @eventidefrance @eventideitalia . #Eventide #EventideInc #EventideAudio #Harmonizer #H949Harmonizer #EventideH949 #EventideHarmonizer #EventideH949Harmonizer #VintageDigitalPitchShifter #VintageHarmonizer #VintageDigitalFXBox #EarlyDigital #Repair #Fix #VintageElectronicsRepair #StudioPiscineATokyo #PiscineATokyo #TheGoodDoctorPrager #LeBonDocteurPrager https://www.instagram.com/p/Bp9MFpSludT/?utm_source=ig_tumblr_share&igshid=t53vh369l1z5

[piscineatokyo]

. . Emergency! Paging Doctor Prager! Emergency! Paging Doctor Prager! Emergency! Paging Doctor Prager!!! . 😨😨😨😤😤😤😡😡😡 . @eventideaudio @eventidefrance @eventideitalia . #Eventide #EventideInc #EventideAudio #Harmonizer #H949Harmonizer #EventideH949 #EventideHarmonizer #EventideH949Harmonizer #VintageDigitalPitchShifter #VintageHarmonizer #VintageDigitalFXBox #EarlyDigital #Repair #Fix #VintageElectronicsRepair #StudioPiscineATokyo #PiscineATokyo #TheGoodDoctorPrager #LeBonDocteurPrager https://www.instagram.com/p/BpwW1wpFvVn/?utm_source=ig_tumblr_share&igshid=kbqpwar91dqe

[piscineatokyo]

. . Restoration of @motorbass 's @eventideaudio H910 (cont') . Last minor step before alignment: rebuilding the previously installed modification that allowed connecting audio signals directly on the front panel by means of three standard jack sockets . As the holes drilled for them into the thick, steel metal panel are of course permanent, I found it somewhat neatier just to replace the old school, open jack sockets (clearly designed for studio patchbays) with more modern, new "half-closed" chassis sockets that not only protrude much less than the old ones, but also look more elegant! 👌(decoration flat-head screws also had to be installed: even if the new jack sockets do not need them in order to be attached to the panel, the corresponding empty holes would have "destroyed" the elegance of the mod in this new version! 😉) . The old inner cables linking the sockets to the analog PCB have also been replaced with new ones that use aluminum, 100% isolating shield (instead of the much leaky braid in the old cables) 👌(this is particularly important, given the fact that those cables run very close to the radiating power transformer... fortunately the unit has the optional in/out balancing transformers 😊) . #Eventide #EventideInc #EventideAudio #Harmonizer #H910Harmonizer #EventideH910 #EventideHarmonizer #EventideH910Harmonizer #VintageDigitalPitchShifter #VintageHarmonizer #VintageDigitalFXBox #EarlyDigital #Restoration #Repair #Fix #VintageElectronicsRestoration #ElectronicsRestoration #VintageElectronicsRepair #Motorbass #MotorbassStudio #MotorbassRecordingStudio #MotorbassParis #StudioPiscineATokyo #PiscineATokyo #TheGoodDoctorPrager #LeBonDocteurPrager https://www.instagram.com/p/Bpd-q3RBj8O/?utm_source=ig_tumblr_share&igshid=1gxl7peq29yso

[piscineatokyo]

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. . Restoration of @motorbass 's @eventideaudio H910 (cont') . Still in the ninth step (troubleshooting)... but it looks like we're finally getting somewhere, at last!!! ☺️☺️☺️ . After finding a few dead op-amps in the D/A section, as well as the previously replaced 74C73 flip-flop on the digital board, it seems that the illness of this (1977) H910 has been mostly cured... 😊 . (not completely though, as there are still some minor "bugs" here and there to fix, and there will also be the final, tenth step to go: alignment 😉) . @eventidefrance @eventideitalia . #Eventide #EventideInc #EventideAudio #Harmonizer #H910Harmonizer #EventideH910 #EventideHarmonizer #EventideH910Harmonizer #VintageDigitalPitchShifter #VintageHarmonizer #VintageDigitalFXBox #EarlyDigital #Restoration #Repair #Fix #VintageElectronicsRestoration #ElectronicsRestoration #VintageElectronicsRepair #Motorbass #MotorbassStudio #MotorbassRecordingStudio #MotorbassParis #StudioPiscineATokyo #PiscineATokyo #TheGoodDoctorPrager #LeBonDocteurPrager https://www.instagram.com/p/BpbmEq_hxAf/?utm_source=ig_tumblr_share&igshid=1tnoofjp2scgw

[piscineatokyo]

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. . Restoration of @motorbass 's @eventideaudio H910 (cont') . Ninth step (the last of the toughests): troubleshooting has just begun! . Poor (1977-built) H910... You're SOOO sick!!! 😩😰😩😰 . Hopefully the Good Doctor Prager will try to heal you... ☺️ . @eventidefrance @eventideitalia . #Eventide #EventideInc #EventideAudio #Harmonizer #H910Harmonizer #EventideH910 #EventideHarmonizer #EventideH910Harmonizer #VintageDigitalPitchShifter #VintageHarmonizer #VintageDigitalFXBox #EarlyDigital #Restoration #Repair #Fix #VintageElectronicsRestoration #ElectronicsRestoration #VintageElectronicsRepair #Motorbass #MotorbassStudio #MotorbassRecordingStudio #MotorbassParis #StudioPiscineATokyo #PiscineATokyo #TheGoodDoctorPrager #LeBonDocteurPrager https://www.instagram.com/p/BpWPs5oBPNV/?utm_source=ig_tumblr_share&igshid=ten9wmlnd4lx

[piscineatokyo]

. . Restoration of @motorbass 's @eventideaudio H910 (cont') . HD910 "digital" board fully re-populated (and a new ribbon cable has been installed too): eighth phase is over! 😊 . Now on to the next step, and this will be the third and last of the toughest ones: fault finding and final repair... 😩 . @eventidefrance @eventideitalia . #Eventide #EventideInc #EventideAudio #Harmonizer #H910Harmonizer #EventideH910 #EventideHarmonizer #EventideH910Harmonizer #VintageDigitalPitchShifter #VintageHarmonizer #VintageDigitalFXBox #EarlyDigital #Restoration #Repair #Fix #VintageElectronicsRestoration #ElectronicsRestoration #VintageElectronicsRepair #Motorbass #MotorbassStudio #MotorbassRecordingStudio #MotorbassParis #StudioPiscineATokyo #PiscineATokyo #TheGoodDoctorPrager #LeBonDocteurPrager https://www.instagram.com/p/BpWPG1xh1V_/?utm_source=ig_tumblr_share&igshid=bgl2nkihvdz2

[piscineatokyo]

. . Restoration of @motorbass 's @eventideaudio H910 (cont') . Continuation of the eighth phase: HD910 board has just been recapped, new IC sockets and new trimmers have been fitted in. . Next and last part of this step: testing each socketed IC (especially the very sensitive DRAM chips) before reinstalling them on the PCB. . @eventidefrance @eventideitalia . #Eventide #EventideInc #EventideAudio #Harmonizer #H910Harmonizer #EventideH910 #EventideHarmonizer #EventideH910Harmonizer #VintageDigitalPitchShifter #VintageHarmonizer #VintageDigitalFXBox #EarlyDigital #Restoration #Repair #Fix #VintageElectronicsRestoration #ElectronicsRestoration #VintageElectronicsRepair #Motorbass #MotorbassStudio #MotorbassRecordingStudio #MotorbassParis #StudioPiscineATokyo #PiscineATokyo #TheGoodDoctorPrager #LeBonDocteurPrager https://www.instagram.com/p/BpRfERUBoE-/?utm_source=ig_tumblr_share&igshid=18iungjtcj7h9

[piscineatokyo]

. . Restoration of @motorbass 's @eventideaudio H910 (cont') . Seventh step (refurbishment of the HA920 board) finally COMPLETED!!!! Was a tough one but I made it ☺️ . From L to R, T to B: - audio input and S&H sections - audio output section - PLL section - left-hand front panel switches and LEDs - global view no.1 - PSU section - transformer and power switch - right-hand interlocked switches - global view no.2 . @cassius @zdar_war @pnantoine @goddamndoor . @eventidefrance @eventideitalia . #Eventide #EventideInc #EventideAudio #Harmonizer #H910Harmonizer #EventideH910 #EventideHarmonizer #EventideH910Harmonizer #VintageDigitalPitchShifter #VintageHarmonizer #VintageDigitalFXBox #EarlyDigital #Restoration #Repair #Fix #VintageElectronicsRestoration #ElectronicsRestoration #VintageElectronicsRepair #Motorbass #MotorbassStudio #MotorbassRecordingStudio #MotorbassParis #StudioPiscineATokyo #PiscineATokyo #TheGoodDoctorPrager #LeBonDocteurPrager https://www.instagram.com/p/BpMYxlVBdfQ/?utm_source=ig_tumblr_share&igshid=gwaeh8q9hxiw