Rss

Archives for : clusterchord

Keyboard and other music magazines content index search tool

Last September, a generous member of the music forums known as Clusterchord bestowed upon me his extensive collection of Keyboard magazines spanning from the 1980s to the 2000s. His noble gesture was driven by the need for additional space, and I gladly accepted the treasure trove of musical knowledge. Recognizing the value of such a collection, I embarked on a mission to maximize its utility by making it easily accessible and searchable.

To achieve this, I dedicated two weeks of diligent effort to meticulously scan the front covers and index pages of each magazine. With precision and care, I converted these scans into searchable text using Optical Character Recognition (OCR) technology. This transformative process has imbued the collection with newfound functionality, enabling me to swiftly locate specific topics, articles, or references with a simple search command.

Now, armed with a comprehensive index of the entire collection, I possess a powerful tool for exploration and discovery within the realms of musical history, techniques, and equipment. Whether delving into the pioneering synth sounds of the 1980s or uncovering production secrets from the turn of the millennium, I can navigate this wealth of information effortlessly, thanks to the digital transformation of Clusterchord’s cherished collection.

Legal
It’s important to clarify that while I’ve meticulously indexed the front covers and table of contents of each magazine in the collection, I have not scanned or reproduced the actual content contained within the pages. Instead, I’ve utilized Optical Character Recognition (OCR) technology solely on the metadata—the titles, headings, and index entries—to create a searchable index.

This approach ensures compliance with copyright laws and respects the intellectual property of the original publishers and authors. By focusing solely on indexing the metadata, I’ve maintained a legal and ethical framework while still providing a valuable tool for accessing and navigating the wealth of information contained within these publications.

What is it for?
The primary objective of creating this searchable index is to enhance the utility of the magazine collection, especially when dealing with hundreds of individual issues. Memorizing such a vast amount of information would be impractical and daunting, but having a searchable index enables quick and efficient access to specific topics, articles, or references.

With this indexed collection, anyone who possesses a substantial library of these magazines can instantly locate desired information without the need for exhaustive manual searching. Whether you’re a collector, researcher, or enthusiast, this tool significantly streamlines the process of finding relevant content amidst a sea of publications.

So, rather than relying on memory or spending countless hours flipping through pages, the indexed collection empowers individuals to effortlessly navigate their magazine archives and extract knowledge with ease. It’s a practical solution tailored to the needs of magazine collectors and enthusiasts alike.

What’s inside
In recognition of the immense value this indexed collection holds for music enthusiasts, I have decided to share it with the broader community. This meticulously curated index encompasses a wide array of esteemed publications, including:

  • Keyboard Magazine
  • Future Music
  • Sound on Sound
  • Electronic Musician
  • Roland Users Group
  • Home & Studio Recording
  • Music Technology
  • Mix
  • Home Recording.

By making this indexed collection available to fellow aficionados, I aim to foster a spirit of collaboration and exploration within the music community. Whether you’re a seasoned professional seeking to delve into the archives for inspiration or a budding musician eager to learn from the insights of the past, this resource offers a wealth of knowledge and inspiration at your fingertips. I am aware of the muzines website which contains actual content of the magazines, however it does not feature Keyboard, Future Music and some other magazines that are featured in here. In the context of topic search – I think the two can complement each other perfectly. You can think of this tool made for us who have actual (physical) magazines, and need a quick search tool to find some specific topic. Keep in mind that muzines is far superior as it features meta search that goes literally into every article’s every word. But then again, this one is super simple and super fast. You press Ctrl+F, you find the info and go pick up the magazine from the shelf.

Donations are welcome
Furthermore, in an effort to continually expand and enrich this repository of musical history, I welcome donations of magazines spanning the period from 1980 to 2006. Your contributions will not only help build the searchable index but also ensure that future generations can benefit from access to this invaluable reservoir of musical wisdom. Together, we can cultivate a vibrant community dedicated to the celebration and exploration of music instruments, production and technique in all its forms.

Database access
Given the extensive nature of the indexed collection, hosting it on a blog platform could indeed present challenges due to its size and complexity. To ensure a user-friendly experience, I opted to create a dedicated page specifically for this project.

On this dedicated page, users can employ the familiar “command + F” (or “Ctrl + F” on Windows) search function within their web browser. By typing in the desired phrase or keyword, users can initiate a search that will scan the indexed metadata across all magazines in the collection:

https://donsolaris.com/mags/mags.html

The search results will then promptly display which magazines contain references to the searched phrase or keyword, enabling users to quickly pinpoint relevant articles or topics. This streamlined approach simplifies the process of accessing information within the collection, enhancing usability and efficiency for users seeking specific content.

In essence, by providing a dedicated page and leveraging the browser’s built-in search functionality, users can effortlessly navigate the indexed collection and extract valuable insights with minimal effort. It’s a user-centric solution designed to optimize the accessibility and utility of the magazine archive.

Another Oberheim OB-X saved from harm

While Clusterchord has been burning midnight oil lately in his studio I’ve been working on his OB-X. This is the third time I have been working on this machine. First time was some minor service when PWM wasn’t working right. Turned out to be a bad IC in the PWM section of the digital board. At that point I’ve noticed unit has a lot of old CMOS chips, so i replaced them with new ones.

Fast forward two years later, Clusterchord contacted me to do a complete refurbish of the boards inside. No problemo. I replaced VCF trimmers on the voice boards with multi turn. Replaced all the caps with new ones (also found one voice board was dead). Not a big deal it was just one dead TL op amp. Fixed it. So i call Clusterchord to pickup his unit. He takes it away, gets home, and the unit no longer functions correctly. Autotune no longer works. Horrid s/r ratio of the unit with some constant noise going on in the background.

So he returns it back. I check all the chips, everything ok. No clue what the heck is the problem. At that point I got a bit mad because 24 hours before, the unit worked flawlessly. So Ii’ve removed all boards out, resoldered all voice board connectors, all male molex connectors on the motherboard and digital board. Assemble it all back, same problem. This was really starting to become frustrating. (!)

While messing with molex connectors I’ve noticed that at one point the noise got low a bit. So i figured out the source of the problem. Female molex connectors were oxidized, old, and wires were lousy, two of them partly broken (which mean they would conduct while synth is in one position and not in other). So…. I disassembled all the plastic molex connectors, bought new pins, new wire and started a nice whole day work of manually rewiring the whole thing by building new connections. To further prevent oxidation and enhance the connection of the wires on the place where they were being crimped i simply soldered them. This took a lot of hours but it was worth it.

Red wires = something like 160 new connections that I had to build

Power up the unit and the Autotune now works! Great! Noise was … well almost gone. I’ve realized there were two type of noises actually. One was digital like, and this one was now gone. Another one was hiss and after some research turned out to be one of the output op amps. Replaced it, no more noise. Great!

Other source of the noise was one bad IC in this area

At this point the unit worked perfectly! So I called Clusterchord, who at that time was burning some midnight oil to come and pick up the unit. New day he arrives to officially pick up the unit. But after some close inspection we figured out the Decay of the filter doesn’t work right. So he leaves the unit for another day for me to fix it. I start the oscilloscope, start digging through the signal path of the VCF Decay, I get close to one CMOS, and out of nowhere the unit goes totally crazy! I mean totally. It started producing a wild sounding drone, no controls worked right, it was almost frozen with this loud unison tone going out, no matter you press the key or not.

At this point i had no idea what the hell is wrong. Because at that point ALL of the molex connectors were brand new. All of the capacitors on digital board were new. All of the ICs (LOGIC and op amps) were brand new. What the hell is going on!!! In fact I was so mad I returned the unit and said, “dude you get someone else to fix this one, it just gets worse and worse the more we work on it.”.

Fast forward 1 year. While Clusterchord has been burning some midnight oil I sent him an email saying that perhaps I should check the OB-X because I have some new ideas about downgrading his unit to non-Encore and then doing simple side by side test against my OB-X. Mind you, my unit is original and it’s easy to follow the schematics. He had Encore modified unit, and it was a bit harder without schematic. Plus someone did some extra mods on his CPU board. Not sure why. So he brings the unit and I start some more work. At that point the machine is still behaving totally crazy, releasing only digital drones, almost as if it was a PPG. You just don’t know where to start with the service when in such condition! Really frustrating.

New trimmers and battery in the house

But i took it calmly. First I’ve replaced old trimmers on the digital board. And I found three tantalum caps that weren’t replaced on the panel board (thanks to The Real MC for info about what they do). Also the battery was dead, so I’ve installed a new one. Then I took out Encore, installed it into my unit to verify that it work properly and is not the source of the “unit gone crazy” problem. Encore turned out working perfectly. So I’ve installed it back into Clusterchord’s unit. I knew at this point that I will fix his unit. I just knew it. It was only a matter of inspiration.

And now comes the turning point – has to do with servicing Moog Voyagers which i do from time to time. One thing I’ve noticed (and i need to thank Rudi Linhard for info) is that so many Voyagers have problems and it always turns out to be the Texas Instruments chip. So I’ve came with idea – hey, what if that was the case with this OB-X. Four years ago I’ve replaced all of the chips, what if some of those has failed in the meantime.

<dramatic pause> You bet it was! Turned out exactly that. The reason why the machine was going crazy was because 2 of the brand new ICs that i have installed 4 years ago were dead. Can you guess who was the manufacturer? TI – which stands for Texas Instruments. Damn!!! Of course i never expected this outcome. To make things worse, each time i would painstakingly trace things with an oscilloscope looking for the source of the problem i totally ignored these chips, yet the search would always bring me to them! But i still ignored them knowing they are just 4 years old, they can’t be the source of the problem. I was wrong! Thanks again to Rudi Linhard for inspiration!

Goodbye TI chips!

I’ve replaced all 4 chips in that area that were TI, and now the unit finally works!!! Yesterday I’ve calibrated digital and bender boards to factory specs and as of this moment, the unit is finally FULLY functional. This is OB-X was bumping on and off the service bench for the past 4-5 years or so, always something a problem, never working right. And now these days are finally over!!!

Now Clusterchord can take it and burn some midnight oil!

Bonus images:

The search would always lead me to de-mux chip (left of the screws) but since chip was new I’ve ignored it.

I was surprised by the completely dead battery. So I’ve installed a new one. Measured the current draw, and according to calculation this one should last 13.7 years:

OB-X is massive !!!! I’m glad that it is completely fixed now.