Soma - LYRA-8 DIY Kit

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LegWyne
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Re: Soma - LYRA-8 DIY Kit

Post by LegWyne » Thu Jul 30, 2020 6:08 pm

Evicshen wrote:
Thu Jul 30, 2020 3:02 pm

Laser cut plywood! It was supposed to be a prototype but it may end up being the official face plate for a while. I may try staining it. I would like to try acrylic or steel if I have time.
Stain on that would look sik! Couple of polyurethane spray coats to seal then wait a month to sand it smooth.

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Re: Soma - LYRA-8 DIY Kit

Post by proximalterminus » Fri Jul 31, 2020 9:07 am

Evicshen wrote:
Thu Jul 30, 2020 2:32 pm
IT'S ALIIIVVE. I breathed a big sigh of relief after the moment of truth. Are there any tutorials on how to methodically test each part of the synth? Also has anyone put any thought into making this battery powered? Perhaps with a few LiPos in series or some 9V batteries?

2020-07-30 (1).jpg

2020-07-30 (2).jpg

2020-07-30 (3).jpg

Playing with different knob configurations.
Whoa, this is definitely one of the coolest looking Lyra builds I’ve seen!

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buttdispenser
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Re:

Post by buttdispenser » Mon Aug 03, 2020 9:32 am

shiftr wrote:
Sun Oct 28, 2018 6:03 am
I ordered all pots and switches from Banzai.
https://www.banzaimusic.com/home.php
Man, of course I had to find your comment right after I received all of my parts already.. That was exactly the shop I was looking for and couldn't find anywhere. Maybe I'll have to give my Lyra an optical upgrade already soon :oops:

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Re: Soma - LYRA-8 DIY Kit

Post by red-tin-dave » Tue Aug 04, 2020 5:30 am

Evicshen wrote:
Thu Jul 30, 2020 2:32 pm
...

2020-07-30 (3).jpg

Playing with different knob configurations.
I LOVE those red knobs! I need some of those.

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Lanark
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Re: Soma - LYRA-8 DIY Kit

Post by Lanark » Tue Aug 04, 2020 6:33 am

Does anyone know where to get the rare ICs from? I bought the DIY boards from someone but he didn’t send those. He’s looking for them (so hopefully won’t need the info). Soma’s site says they’re HEF4093 NXP (SOIC-14) but that not all ones from all manufacturers work the same...

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Re: Soma - LYRA-8 DIY Kit

Post by Flounderguts » Tue Aug 04, 2020 7:55 am

They're not really all that rare. NXP (Nexperia) IC are available from Mouser, as well as many local parts suppliers. Mouser lists 3 versions, 2 in stock. They're only 40 cents...
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Lanark
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Re: Soma - LYRA-8 DIY Kit

Post by Lanark » Tue Aug 04, 2020 8:39 am

Flounderguts wrote:
Tue Aug 04, 2020 7:55 am
They're not really all that rare. NXP (Nexperia) IC are available from Mouser, as well as many local parts suppliers. Mouser lists 3 versions, 2 in stock. They're only 40 cents...
Ah, great. Thanks for the reply. Will probably get the parts and case from there anyway so if he can’t find them it’s no big deal

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Re: Soma - LYRA-8 DIY Kit

Post by Bamboombaps » Thu Aug 06, 2020 6:55 am

I'm a bit of a moron and am struggling making the the suitable Gerber's from the oscillosaurus panel .brd file. Can anyone send me the verified Gerber ?

nvm sorted
Last edited by Bamboombaps on Sat Aug 08, 2020 3:13 pm, edited 1 time in total.
Synthy stuff for sale https://www.etsy.com/uk/shop/Phew

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Re: Soma - LYRA-8 DIY Kit

Post by jkammerl » Thu Aug 06, 2020 6:31 pm

Hi experienced LYRA-8 builders,

I can't find any orientation mark on the 4093NXP chips:
https://photos.app.goo.gl/7Skn3Y1MfKwCUbAR9

Can anybody tell me if I was lucky and chose the correct orientation?

Thanks a lot!

Julius

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Flounderguts
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Re: Soma - LYRA-8 DIY Kit

Post by Flounderguts » Thu Aug 06, 2020 11:11 pm

jkammerl wrote:
Thu Aug 06, 2020 6:31 pm
Hi experienced LYRA-8 builders,

I can't find any orientation mark on the 4093NXP chips:
https://photos.app.goo.gl/7Skn3Y1MfKwCUbAR9

Can anybody tell me if I was lucky and chose the correct orientation?

Thanks a lot!

Julius
Looks backwards. The *beveled edge* indicates the side with pin 1.

Sorry, mate :cry:
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coutlasssupreme
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Re: Soma - LYRA-8 DIY Kit

Post by coutlasssupreme » Tue Aug 11, 2020 11:14 am

Has anyone gotten a DIY kit lately, are they selling them these days? I cant seem to reach them at the email they provide.

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Re: Soma - LYRA-8 DIY Kit

Post by Flounderguts » Tue Aug 11, 2020 2:37 pm

They take a while to respond. Last batch was about a month ago, so probably another month until they are ready.

I might have a spare set of PCBs if you're in a hurry.
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coutlasssupreme
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Re: Soma - LYRA-8 DIY Kit

Post by coutlasssupreme » Tue Aug 11, 2020 6:21 pm

Hey Flounderguts,

Thanks for the info.

Actually I would, could you send me the details to jorgeluisvelez at gmail dot com.

LegWyne
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Re: Soma - LYRA-8 DIY Kit

Post by LegWyne » Wed Aug 12, 2020 8:38 pm

SOMA are putting out a sequencer for Lyra 8/Pulsar, the Ornament-8 interfaces with the Lyra 8 using an adapter that seems to complete the circuit when it receives CV input. I'm still very new to electronics but I assume this is achieved with a transistor per voice? The Ornament 8 looks amazing but I can't afford more gear after this so I'm thinking I'll attempt to bodge a similar adapter that connects to an Arduino for midi control if I can figure out the basic building blocks of the circuit design. You can see the adapter in the video below and on their website https://somasynths.com/description-ornament/



would a circuit is simple as this work safely? just run either 0 or 5v from the microcontroller to the NPN transistor base and connect the collector and emitter to the two touch terminals?
non transistor switch.jpg
non transistor switch.jpg (11.28 KiB) Viewed 415 times

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Re: Soma - LYRA-8 DIY Kit

Post by Flounderguts » Wed Aug 12, 2020 11:48 pm

If you look closely, you will see that the Ornamental-8 actually has dedicated pins to run the Lyra. This means it is not simply outputting CV.

Having said that, shorting the two pads turns on the voice. Presumably, you can use a transistor, an analog switch IC, an opamp, or an optocoupler to do that. Very easy to adapt an arduino with a midi library to simply turn on and off the pads...but they will only operate as gates. You would have to somehow tweak the tuning circuit so that you could control semitones using a similar method. You could also run midi cc messages to operate other parameters.

However, if you actually want to make a digital Lyra, I think there are better instruments to start with. Digitizing a Lyra seems somehow like chaining a fairy.
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LegWyne
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Re: Soma - LYRA-8 DIY Kit

Post by LegWyne » Thu Aug 13, 2020 2:37 am

Thx for your response! I like creative constraints and a Lyra 8 is what I will have so it's what I will use. Plenty of potential for some hacky cross modulation with my Medusa and Axoloti. Still waiting on the PCB's so will have to experiment when its built. The Ornament 8 documentation states that all the outputs are 0-10v, so I guess a transistor for gate on and off and a resistive optoisolator for varying the output might be simplest? I imagine this would produce a variation in volume rather than pitch so this would just be for sequencing/modulating rhythmic use of the 8 voices. I'm not looking to digitally control the internal pitch. If I can get my head around coding an arduino then hopefully I can use either use pitchbend values with MPE for increased resolution or some kind of smoothing on CC changes to get decent results.

The goal with this mod wouldnt be to digitise the lyra 8 so much as to bodge together a cheap digital knock off patch of the ornament 8 for my axoloti :p I need to pull together some kind of adapter to attempt this

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Re: Soma - LYRA-8 DIY Kit

Post by LegWyne » Thu Aug 13, 2020 2:56 am

Hmmm on closer inspection I think you're right needing to connect ground makes it look like its not outputting 0-10v but switching within the ornament 8. From the manual: "Output contact LYRA . While the cell is active, this contact is connected to ground. When the cell is not active, the contact is not connected to anything. With the phase switch in lower position, the behavior of the contact is inverted. These outputs are designed to connect the ORNAMENT to the LYRA•8. Use the sensor overlay adapter (sold separately) to connect to LYRA. Connect LYRA outputs to adapter pins 1–8. Connect one of the pins of the adapter GND to one of the pins of the GND of ORNAMENT. In ORNAMENT and adapter both GND contacts are ground. On the adapter, they are connected to the lower LYRA sensors (bottom row) and the instrument ground. In ORNAMENT, both GND pins are connected to the ground of the instrument. The LYRA contact, connected through the adapter to the LYRA, at the moment of activation of the cell, connects the sensor to the ground, simulating a finger touching LYRA’s sensor, and starts this voice of the instrument, thus allowing the ORNAMENT to control the LYRA."

Transistor + resistive optoisolator sounds like it should still work tho?

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Re: Soma - LYRA-8 DIY Kit

Post by Flounderguts » Thu Aug 13, 2020 9:47 am

Yeah, I think so.

FYI, I have a board in development that will allow gates to the Lyra. I was originally planning to do it as part of my 1U I/O panel, but I'm thinking of a standalone PCB now. That way, you could hook up whatever you want that outputs 2v-15v gates to the inputs. I'm sure that you can do that with an Axloti?
I was going to use optoisolators with voltage clamping. I have it done up on a breadboard, but my Lyra build isn't finished yet, so I can't test it on the actual application. Seems to work on the bench, though.
Someone also turned me on to a set on analog 4 channel switches that can accept up to 20V input. That looked good, but I'd have to run power and a voltage regulator to get the 5v needed for the switch ICs. With the optocoupler, I can also get led outputs for the gates more easily.
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LegWyne
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Re: Soma - LYRA-8 DIY Kit

Post by LegWyne » Thu Aug 13, 2020 5:32 pm

I'd like to make something myself for the learning experience. Im picturing more of a standalone device tbh with an integrated micro controller so it can interface with my other midi gear (I don't have the money for eurorack) sounds great for folks who have a lot of CV modulation on hand tho!

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Re: Soma - LYRA-8 DIY Kit

Post by Evicshen » Fri Aug 14, 2020 5:08 pm

Here's some front panel experimentation. I literally JUST moved so I can't find my allen wrenches to take off the knobs to swap out my current panel.
20200811_230031.jpg
20200812_013827.jpg
20200812_020707.jpg
20200814_090113.jpg
20200814_090228.jpg

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Re: Soma - LYRA-8 DIY Kit

Post by Flounderguts » Fri Aug 14, 2020 11:42 pm

A lot of work went into that! Love the mother of pearl pads!
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Re: Soma - LYRA-8 DIY Kit

Post by Evicshen » Sun Aug 16, 2020 3:03 am

Flounderguts wrote:
Fri Aug 14, 2020 11:42 pm
A lot of work went into that! Love the mother of pearl pads!
Thank you! I caved and went to the hardware store to buy a whole set of Allen wrenches when I only needed one 10mm wrench... Here's the new panel installed!
20200815_232324.jpg

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Re: Soma - LYRA-8 DIY Kit

Post by Stoneyards » Sun Aug 16, 2020 2:00 pm

Evicshen wrote:
Fri Aug 14, 2020 5:08 pm
Here's some front panel experimentation.
Wow, I'm loving the art - and, is that glow-in-the-dark paint?

Tell us a little more about your process!

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Re: Soma - LYRA-8 DIY Kit

Post by D.Tilbury » Sun Aug 16, 2020 5:40 pm

Evicshen wrote:
Sun Aug 16, 2020 3:03 am
Flounderguts wrote:
Fri Aug 14, 2020 11:42 pm
A lot of work went into that! Love the mother of pearl pads!
Thank you! I caved and went to the hardware store to buy a whole set of Allen wrenches when I only needed one 10mm wrench... Here's the new panel installed! 20200815_232324.jpg
Man that looks killer. Reminds me of a mix between some black metal band name/album designs and 80's/90's graffiti tagging.
-blippen
"Dirtle Tilbury"

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Re: Soma - LYRA-8 DIY Kit

Post by Evicshen » Tue Aug 18, 2020 12:24 am

Stoneyards wrote:
Sun Aug 16, 2020 2:00 pm
Evicshen wrote:
Fri Aug 14, 2020 5:08 pm
Here's some front panel experimentation.
Wow, I'm loving the art - and, is that glow-in-the-dark paint?

Tell us a little more about your process!
It's just fluorescent orange spray paint though now I wish I had gone with glow-in-the-dark. The art combines an illustration I did with a logo my friend made for my music project, the text is mostly handwritten German translations of the original text. Using a laser cutter, I vector cut the holes and outline of the front panel first, covered the panel with clear tape, engraved the first image, spray painted it orange, covered it again in clear tape, engraved the text, spray painted it black, and then peeled off all the tape. Later I vectorized touch pad parts of the bitmap image using Inkscape, and cut the ovals out of nacre sheets, and applied them with wood glue.
LYRA-8 TOP panel_text.png
LYRA-8 TOP panel_hands.png

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