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Topic ClosedThe mighty modular synth

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Davesax1965 View Drop Down
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Direct Link To This Post Posted: January 23 2016 at 04:57
And a vintage valve oscilloscope, just for fun. This is a Heathkit OS-2.

I'll get an analogue broadcast camera which means this can be projected live at gigs. Also, two oil wheel projectors are being built and I'm going to use the camera to do a "howlaround" effect" - think "early Dr Who titles". You point the camera at its' monitor and it produces video feedback. Only really works with analogue gear as digital has too fast a processing rate and cancels it out, mainly. 

All going very 1970's. ;-)



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Direct Link To This Post Posted: January 26 2016 at 06:07
And some more scopery.....



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Direct Link To This Post Posted: January 27 2016 at 23:45
Well done, good sir. Clap

My avatar heartily approves of this development.
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Direct Link To This Post Posted: January 28 2016 at 02:40
Thanks, Replayer. ;-) Much appreciated !!

The latest additions to the synth have been an echo unit and a "Sallen-Key filter, which should be soldered up in a weekend or two (got a health scare at the moment and can't see well enough to do all the fiddly soldering. ;-) ) 

There's still some finishing off to do. Well, quite a lot of finishing off to do, to be honest. ;-)



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Direct Link To This Post Posted: January 28 2016 at 02:43
Echo unit, just under Replayer's avatar. ;-)

Seriously, if I'm convincing anyone to have a go at this: get stuck in, folks, it's great fun. I'd only ever soldered up guitar pickups before, and that with a lot of swearing. For those not quite as demented as I am, you can buy all the stuff pre-made. I'm just kinky like that. ;-)



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Direct Link To This Post Posted: January 28 2016 at 02:46
It's getting a bit complicated. 
And there's another cabinet to be ordered....... this one's nearly full !!

Patch cables omitted for clarity. The "keyboard" is an Arturia Minibrute with imported walnut sides. This no longer acts as a standalone synth: better get another one..... now it kicks out MIDI information. This goes up to the very top of the synth into the left hand box in the pic - two plugs - which is a sequencer. (The other sequencer is synchronised to the first but goes off to another synth, a Korg MS-20). 

The sequencer info comes out, in MIDI format, and goes into the middle row of the synthesizer. On this row, the "control voltages" it produces can be processed by another unit which increases or decreases or inverts the voltage (an attenuverter) - this then kicks out CV - control voltage - into a pair of splitters and then a triple oscillator, filter, envelope generator, filter and output module, last right hand unit on the top row - the audio output then goes to an audio mixer and on to the PC soundcard and Cubase. 

The rows above and below the middle one are extra oscillators, filters, amps, you name it. They're "nearly finished". At the very top and bottom of the synth are patch panels which, if an input goes into one, automatically routes that input around the case, so you get multiple outputs and less external cabling to worry about. These will be used to form a bus to expand the system into another similarly sized case. The beauty of modular synths is that they can be infinitely expanded, just keep adding modules, cases and power supplies and you can patch anything into anything, if it's logical and you have the time and money to afford and build it. ;-)




Edited by Davesax1965 - January 29 2016 at 07:42

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verslibre View Drop Down
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Direct Link To This Post Posted: January 28 2016 at 12:39
^Lovely! May I borrow it? Big smile
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Direct Link To This Post Posted: January 29 2016 at 02:53
;-) 
Actually, I might start hiring it out. The trouble with that is that the thing is so damn complicated that you'd need a week to read the instruction manual. 

The second cabinet should make it slightly more complicated than the Space Shuttle. If I do it correctly. ;-)

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Direct Link To This Post Posted: January 29 2016 at 03:16
This is what happens when you start patching it up. 

I nerd, sorry, need, about twice the number of patch cables to get everything fully operational. So there's another £100. ;-) All this spaghetti will get much more complicated (exponentially so) as the second cabinet arrives and is populated. 



Of course, this is the main restriction on modular synths: they're not very practical as they take so long to set up. It's not like choosing a preset sound - immediately. However, once patched, modern analogue modulars are stable enough to stay in tune (the old ones weren't) and what happens from there is that you can start adjusting small parameters, such as filter cut offs (etc) - so the patched sound starts evolving and changing. Totally different kettle of fish to anything I've played before. Quite a learning curve. 

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Direct Link To This Post Posted: January 30 2016 at 05:36
Whoops.

Had a stroke, at the age of 50 !! Looks like I need to take a long rest, folks, and to learn to slow down a little. I'll be back here in a few months, but take care, all, look after yourselves, too !! I'm fine, over the worst, but wooo. Big tap on the shoulder from the Grim Reaper. ;-)))))

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Direct Link To This Post Posted: January 31 2016 at 00:15
I'm really sorry to hear that. Take it easy, have a relaxing break and keep on progging. I look forward to hearing from you again.
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Direct Link To This Post Posted: January 31 2016 at 07:00
Sorry to hear of your close encounter with the one who always speaks in capitals. Get well soon, and carry on.

... brought to you by the Weeping Elf

"What does Elvish rock music sound like?" - "Yes."

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Direct Link To This Post Posted: February 01 2016 at 10:59
Originally posted by Davesax1965 Davesax1965 wrote:

Whoops.

Had a stroke, at the age of 50 !! Looks like I need to take a long rest, folks, and to learn to slow down a little. I'll be back here in a few months, but take care, all, look after yourselves, too !! I'm fine, over the worst, but wooo. Big tap on the shoulder from the Grim Reaper. ;-)))))
 
Whoa! Take it easy, Dave. Put your feet up and warm thy bones beside the fire. Throw on some nice music with big analog-electronic sounds and float away...see you soon!
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Direct Link To This Post Posted: February 16 2016 at 08:58
Thanks, Verslibre !!

Off work for another month. Everything's come back, nearly, just some vision loss, I'm a bit wobbly and get tired very easily.

I think the neighbours might drive me back to work with flaming torches, though. Never move in next to a musician...... this isn't the modular, it's an analogue synth being driven by a sequencer. 




Edited by Davesax1965 - February 16 2016 at 08:59

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Direct Link To This Post Posted: February 16 2016 at 15:13
Welcome back, Dave! Glad to hear you're feeling better.
 
I was actually thinking of getting an Arturia MiniBrute as my first analog synth and it made to the top four, along with the Arturia MicroBrute, Korg MS-20 Mini and Novation Bass Station II (which I wound up getting).
 
Earlier in this thread you discussed non-keyboard controllers for synthesizers. Have you ever used a MIDI wind controller and if so, how easy was it to play as a saxophone player?
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Direct Link To This Post Posted: February 17 2016 at 05:49
Hi Replayer, just coincidentally uploading an MS20 video to Facebook at the moment !!! Development on the modular has stalled as I can't see well enough to solder. Should be OK in a few weeks. ;-)

Wind synths. 

I bought one of the first Yamaha WX11's, back in 1990. The technology was way ahead of its' time, and it came with several faults, including the irritating habit of jamming open on notes. MIDI bagpipes, anyone ???? It went back to the shop a couple of months later. I seem to recall it was £500, which was a fair bit of money at the time. 

I was thinking, on and off, about getting the latest Yamaha wind synth - the WX5. It's not been in regular production for a few years (you can imagine they're not volume production items) and the support is a bit hit and miss, to say the least. The other alternative is something like an Akai 5000 - I don't like Akai wind synths, the conductive keypad means you have to play it with your fingers off the keys, which is totally counterintuitive to a sax player. Also there's a plastic mouthpiece you bite to get vibrato. Frankly, no thanks. 

Wind synths don't play anything like a sax- they're sort of a sax, and not a sax. Anyone who's played a guitar synth will probably understand what I mean. They take a lot of getting used to. Interesting, though. One problem I have with them is that most sax players get hold of one..... and then try and make it sound like a sax, which is B O R I N G and unimaginative. You have a whole world of sounds out there, so they go for a "sax" sound, and it sounds like the Marvelous Mechanical Mouse Organ. 

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Direct Link To This Post Posted: February 17 2016 at 06:43
And, whilst I'm waiting for my eyes to return to "solder capable" levels, here's a Korg MS20 being sequenced via a Doepfer Dark Time. The output goes into (a) a Heathkit OS2 valve oscilloscope and (b) An ART Studio V3 valve preamp (we like valves, they are our friends) and from there to the PC where some effects are added. The audio is crap quality as the webcam microphone is interfering with the soundcard. 

Just think "Tangerine Dream, 1973". ;-)



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Direct Link To This Post Posted: February 17 2016 at 10:05
Originally posted by Davesax1965 Davesax1965 wrote:

I was thinking, on and off, about getting the latest Yamaha wind synth - the WX5. It's not been in regular production for a few years (you can imagine they're not volume production items) and the support is a bit hit and miss, to say the least. The other alternative is something like an Akai 5000 - I don't like Akai wind synths, the conductive keypad means you have to play it with your fingers off the keys, which is totally counterintuitive to a sax player. Also there's a plastic mouthpiece you bite to get vibrato. Frankly, no thanks. 

Wind synths don't play anything like a sax- they're sort of a sax, and not a sax. Anyone who's played a guitar synth will probably understand what I mean. They take a lot of getting used to. Interesting, though. One problem I have with them is that most sax players get hold of one..... and then try and make it sound like a sax, which is B O R I N G and unimaginative. You have a whole world of sounds out there, so they go for a "sax" sound, and it sounds like the Marvelous Mechanical Mouse Organ. 
Thanks for your input. I was thinking of getting an Akai EWI-USB for around £180 for a friend who is a MIDI hobbyist and used to play saxophone. The ability to switch fingerings between default/flute/sax/oboe sounded intriguing, but I was afraid of the issue you mentioned with the counterintuitive electroconductive keys. The retailer has a two week return policy so I might still take a chance on it and see if he likes it.
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Direct Link To This Post Posted: February 18 2016 at 02:33
£180 for an EWI is pretty good. Worth a try, Replayer. 

The trouble I have with electroconductive keys is that most sax players (if they're properly trained) are taught to keep their fingers ON the keys at all times. Then again, I just looked at a video of me playing soprano, and I take my fingers off the keys when doing so. ;-) You'd get used to it. 

The problem I have with most wind synths is that, to save $5 on plastic, everyone makes them soprano shaped. The most difficult sax to play, with all the weight on your thumbs and outstretched arms. Well, thanks a lot. ;-) I *have* seen WX7's turned into things which look more like saxes, with proper necks and bodies, but..... Someone used to make a plug in kit which turned a conventional sax into a wind synth, but it was ludicrously expensive. I could actually do much the same thing using an Arduino board and a pressure / velocity controller. If I had the time and energy. ;-)

For a starter wind synth, the EWI is fine. I nearly bought Bridget Wisharts' old one, she wanted too much money for it. £180 in musical terms is not a lot of cash, and eBay is your friend should your mate not get on with it. Why not, eh ? ;-)


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Direct Link To This Post Posted: February 18 2016 at 02:38
Whilst I'm here - second output module on the modular finished off yesterday - modules with red knobs, right hand side of photo, rows 1 and 2. This constrains me to using a mixer as I have multiple audio outputs now. ;-) (More money.)

One more voltage controlled amplifier and this case is full, so I'm getting a second 6U (two row) case which will stand on top of this one. Modular synths, Gods' alternative to having money. ;-)



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