Wednesday, September 03, 2008
Roland 80017a
via this auction for the 80017a
"Problems Typically Solved by Replacing the Failed 80017a Chip Include:
* Erratic or sudden loud noise from synthesizer output, particularly after 10 minutes of powering up.
* Note hang-ups or long sustain.
* One synth voice will not respond to filter or amplifier changes.
* Unstable operation.
* Juno-106 or MKS-30: Notes will not play, most typically every 6th note will not play due to failed 80017a chip.
* GR-700: One particular voice or string will not sound, "D" string, "A" string etc.
The sound of the failure will change depending on which part of the circuit is not working: the VCF or VCA for example. The above example is provided to illustrate one type of failure. Your synth may have different symptoms as listed above. About the 80017a VCA/VCF chip:
The 80017a chip was a real workhorse for Roland synthesizer engineers in the early 1980s. This one chip contained both the classic, driving -24 dB voltage controlled low-pass filter with a smooth voltage controlled amplifier. By placing all the components on one chip, Roland was able to keep the classic sound of their analog synthesizers across various products, with low production costs. Almost immediately Roland knew they had a problem on their hands, and changed production methods.
When these chips fail, sometimes voice will stop working completely. On a keyboard synth, this shows up as every sixth voice not working. On a GR-700 guitar synthesizer, this shows up as one string’s synthesizer voice failing. But the chips may not fail completely, resulting in a lack of control over the filter quality for one voice, or by sudden, loud erratic sounds from the synthesizer. The only solution to these problems is to replace the existing 80017a with a new chip.
This chip is from lot 50, produced after Roland solved the manufacturing problems. Probably 20 years after the original production date, this chip is still working well without failure."
You can find scans for the following all via the auction here
Juno-106 Service Manual
Roland Service Note
MKS-30 Schematic
Juno-106 Failed Chip Test Procedure
Juno-106 Calibration
GR-700 Calibration
Moog Memorymoog Plus
images via this auction"The memorymoog + is the only one capable of taking a MIDI retrofit, and it also has more stable oscillator control. The version can be checked in the AUTOTUNE feature. The Memorymoog is like having six Minimoogs stacked in one! Features include VCO syncing, sample and hold, and separate filters for each voice! It also has a unison mode for a fat 18 oscillator monophonic bass and lead. And as its name would suggest it has memory storage, 100 patches!"
KORG MS20
images via this auction"It is the original factory built 240V AU/UK/European version with original moldered Australian plug and can safety be used in all countries with 230/240V such as AU.UK and Europe. This is a huge advantage to buying one of the 100V MS-20's from Japan
Originally, the filters used Korg's proprietary KORG-35 chip. Later, the filters were redesigned to use off-the-shelf LM13600 OTAs. MS-20 fitted with LM13600 filters have a small daughter board. This one here has the later filter (the small screw above the VCA graphic on the outside it's a newer filter, if it has no screw it's a korg35. That screw is what holds the daughter board for the newer filter. )"
susm - my diy synthesizer (prototype)
YouTube via mytoube2008. Livewire type knobs.
"here my synthesizer prototype.
features:
2 x lfo
2 x vco
lp / hp / bp filter
vca with 2 x lfo
routingmatrix (everything to everything)
all oscilators got square and triangle out and have also a seperat output for all waveforms, so you can use together with a modular system.
mainoutput goes thru filter and vca which are both bypass abled.
--- reverb added ---"
MaxMSP clicks for the modular synth.
YouTube via dkimcg
"I used the PlanB Model 17, Model 10, and the Model 26 to create syncopated rhythms based on a click that Max/MSP was outputting via the MOTU 828 MK2. The Triple Timer is excellent for making triggers/pulses out of any incoming voltage. It doesn't have to be an envelope, so it's great for making the Cyclotron the master clock. You can create triplets from the slower notes with the M28, but it can get a bit messy and hectic unless the beat is a steady 1/4 or 1/2 notes.
This patch in max is one from a little while ago where I was testing out the new meter system in Max5 and the click~ object. There's no midi involved, just clicks and the modular processing the click and making new triggers and envelopes from that and the modulators.
There are samples though. two tracks of them, in Max."
Crumar Spirit analog synth
YouTube via buchla300
"Great little synth I just got back from being repaired by James Walker at Synth Repair Services. Don't have much experience of it, so just me noodling. I like it towards the end (after 5 minutes) where I add S&H to the filter. Very flexible with 2 filters and some great modulation possibilities and a pretty funky Arpeggiator." Odd note: this one sounds a bit like my Waldorf Pulse Plus.
Analog Synthesizer DIY Test Teil I
YouTube via Redled72
"Test einiger aufgebauter Module:
VCO + Wellenformer, ADSR, VCO, VCA, LFO, Envelope-Fallover =). Bereits fertig gestellt sind 29 Module. 3x VCO, 3x Wellenformer, 3x Antilogconverter, 3x LFO, 2x Moog-VCA, 1x Bandpass, 1x Tiefpass, 4x ADSR, 4x VCA, 1x Envelope-Fallover, 1x Ringmodulator, 1x S&H + Noise, 1x Pseudostochastik-Generator, 1 x Noise-Generator, 1x Noise-Manipulator, 1x Metalsoundgenerator, 1x Mixer"
Binder and Tim and John part 1 synth jam
YouTube via rustystillwater.
binder and tim and john synth jam part 2
"carabar columbus OH july 2008 live diy analog synth"
"these vids of an improv show featuring Soundlab, Theremax, MFOS modular and sequencer several APC's Good time just turned on and let her rip"
Access Virus TI OS 2.7 has landed
"Recklinghausen, Germany - Access Music GmbH, the company behind the award winning Virus TI synthesizer series released OS 2.7 after an extensive public beta test.
The new version, which is compatible with the entire Virus TI range including the Virus TI Snow, is a landmark in Access' history of free feature OS updates. It introduces Atomizer (an unique realtime glitch- and looper effect), a third USB buss to transfer even more discreet audio channels in between the synth and the sequencer and support for multiple devices. It also adds Virus Control Center, a MacOS/Windows application which can backup and restore the memory content of the entire synth and overwrite the ROM patch banks with new sounds. A detailed list of all additions and solved issues can be found on the download page as well.
OS 2.7 is available free of charge to every Virus TI user from http://www.virus.info today."
The new version, which is compatible with the entire Virus TI range including the Virus TI Snow, is a landmark in Access' history of free feature OS updates. It introduces Atomizer (an unique realtime glitch- and looper effect), a third USB buss to transfer even more discreet audio channels in between the synth and the sequencer and support for multiple devices. It also adds Virus Control Center, a MacOS/Windows application which can backup and restore the memory content of the entire synth and overwrite the ROM patch banks with new sounds. A detailed list of all additions and solved issues can be found on the download page as well.
OS 2.7 is available free of charge to every Virus TI user from http://www.virus.info today."
Ensoniq ESQ-1 demonstration
YouTube via teanegro. No video, just audio.
"Demo-clips from my old Ensoniq ESQ-1 synth. All sounds coming from ESQ-1 + internal sequencer." via pascal clavier in the comments of this post.
RozzBox Shipping to Big City Music
via the Big City Music blog:"We just got word from Kilian that our RozzBox shipment is leaving Germany today and should arrive by early next week.
Kilian emailed this pic that he shot with his mobile phone just before he packed and sent them to us. The wait will finally be over for those customers who pre-ordered their RozzBox earlier this year."
bigcitymusic.com
jhhl.net Sruti Box
"A sruti box or shruti box is a bellows driven harmonium-like instrument that provides a drone, used in Indian music and spiritual practices.This iPhone application simulates a sruti box with 12 reeds, which can be tuned in various ways, and you pump the bellows by waving the phone. There is a parameter that can be set so you don't have to do this, but I find it adds to the authenticity in a subtle way. SrutiBox provides sets of intervals, timbres and voicing controls to build drones for music, meditation, tuning, and educational purposes."
Sruti Box
You can get SrutiBox here:
Theremin Giveaway on The Unusual Times
via The Unusual Times"In our never ending appreciation for all things unusual, we are proud to announce that TheUnusualTimes.net is giving away a Moog™ Etherwave® Theremin exploration kit, which includes everything you need to play the unusualist of instruments. Invented by Léon Theremin in 1919, the Theremin allows the player to control two radio frequency oscillators via hand position around two antennae. One of the oscillators controls frequency, and the other volume. The electrical signals of the instrument are amplified through an amplifier. If you're not sure what a Theremin sounds like, read about this fascinating instrument or watch this video of a real Theremin virtuoso!"
via GetLoFi
the elektrocardio midi controller
via rucyl mills"I built the elektro-07 so I could control the sonic and visual parameters of my live performances without having to look deep into the eye of my laptop, hunched over in computer music stance. I'm still learning how to play it.. Software wise, it runs a maxMSP/Jitter patch smoothly, connected to my laptop by a long usb cable. Major thanks to Luke DuBois. Originally it was named the Chakakhantroller after Chaka Khan... but you wouldn't believe how many people don't get the reference.. so I changed it to Elektro-07 after my newly launched label, Elektrocardio. Next version will be wireless, and yes... it's made of black leather and snakeskin."
Sexy Computer Nerd
Sexy Computer Nerd from elektrocardio on Vimeo.
"made with a macbook isight camera and maxMSP programming language"
via CDM where you can find a little more detail on the artist.
Fender Rhodes Chroma Synthesizer Magazin Article and Audio
via Chris Ryan on the Rhodes Chroma list: "This month's addition to the site is the article "Fender Rhodes Chroma" from the May-June 2008 issue of Synthesizer Magazin. Christian Kleine [21030210] kindly translated the article from the original German to English. It's an entertaining read, and four audio demos are included."Click on either the German or English link for the respective article.
Ensoniq ESQ1 Digital Wave Synthesizer
YouTube via NuMaNSound
"8 voice analog/digital synthesizer demo by Numansound"
Rhythms with the Flame synth.
YouTube via RothHandle
"Last friday one of my machines decided that I needed to spend some more time with the Rhys Marsh track I have been working on so it sort of erased all the names of all of the files and let my try to find them again...I think I might be finished on Thursday.
Anyways I took a short break and messed around with some pedals trying to make a rhythm using the sounds from the flame synth as the base. After the flame synth we have the moogerfooger analog delay and then the murf and then my latest pedal...the teaspoon from the squarewave parade.
This was filmed at the roth händle studios in Stockholm. If you are curious about the studio please visit www.roth-handle.nu"
KORG MS-20 patching party
YouTube via Zolophile
"FIVE MS-20's chained together. The SQ-10 sends a trigger pulse and each MS-20 delays it slightly (using ENV 1)."
Frank Zappa's E-mu Modular
via the Mediatheque Museum. In Googlish here."The copy of the Music Museum was donated in 1993 by the musician Frank Zappa, one of the most famous users of modular and one of the few to be used on stage.
Patrick Gleeson has also used the modular EMU in an impressive system comprising more than 90 oscillators (Rainbow Rising). S'ajoutent à la liste de ses prestigieux utilisateurs Herbie Hancock, John Mac Laughlin, John Adams, Vince Clarke, et le groupe Tangerine Dream. In addition to the prestigious list of its users Herbie Hancock, John Mac Laughlin, John Adams, Vince Clarke, and the group Tangerine Dream."
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MATRIXSYNTH - EVERYTHING SYNTH
© Matrixsynth - All posts are presented here for informative, historical and educative purposes as applicable within fair use.
MATRIXSYNTH is supported by affiliate links that use cookies to track clickthroughs and sales. See the privacy policy for details.
MATRIXSYNTH - EVERYTHING SYNTH
