Search found 139 matches

by Bjarne
Tue Feb 16, 2021 12:20 pm
Forum: Music Tech DIY
Topic: Where are the DIY analog polysynths?
Replies: 56
Views: 9946

Re: Where are the DIY analog polysynths?

Nice! I’m interested (and it’s good to see you’ve explored the Ambika as well).
Cheers
by Bjarne
Thu Feb 04, 2021 4:27 pm
Forum: Music Tech DIY
Topic: [Ordering Closed] Gene Model I Drum Synth
Replies: 95
Views: 10478

Re: [Ordering Closed] Gene Model I Drum Synth

:doh: Of course
by Bjarne
Thu Feb 04, 2021 2:59 pm
Forum: Music Tech DIY
Topic: [Ordering Closed] Gene Model I Drum Synth
Replies: 95
Views: 10478

Re: [Ordering Closed] Gene Model I Drum Synth

Gene really seems like an awesome and original machine. It’s the power section that scares me. I would actually have preferred a wall wart.
by Bjarne
Thu Jan 21, 2021 4:39 pm
Forum: Music Tech DIY
Topic: Soma - LYRA-8 DIY Kit
Replies: 882
Views: 89279

Re: Soma - LYRA-8 DIY Kit

Interesting! I appreciate the effort.
Cheers
by Bjarne
Thu Jan 14, 2021 2:16 pm
Forum: Music Tech DIY
Topic: DIY Niceties for the Casio CZ-101
Replies: 17
Views: 720

Re: DIY Niceties for the Casio CZ-101

The price for the Virtual CZ was just increased 72 Euro's. Ouch.
by Bjarne
Wed Jan 06, 2021 4:09 am
Forum: Music Tech DIY
Topic: Phoenix / Shruthi wasp filter build DISPLAY issue
Replies: 6
Views: 110

Re: Phoenix / Shruthi wasp filter build DISPLAY issue

I’d just like to add that there are still tons of useful information and guides related to Shruthi/Ambika/Anushri on the legacy Mutable Instrument pages for discontinued products:

https://mutable-instruments.net/archive/

Cheers
by Bjarne
Sat Jan 02, 2021 7:04 am
Forum: Music Tech DIY
Topic: OPERA ROTAS, a DIY mutant drum machine BUILD THREAD
Replies: 207
Views: 10650

Re: OPERA ROTAS, a DIY mutant drum machine BUILD THREAD

Wow,

all of the above sounds great! Any reason for going with 6n138 instead of 6n137?
Edit: the reason I’m asking is that I’ve seen several recommendations for 6n137 over 6n138, e.g. https://forum.mutable-instruments.net/t ... plers/5255

Happy (better) new year
by Bjarne
Thu Dec 31, 2020 10:50 am
Forum: Music Tech DIY
Topic: PROGUE - Analog mono synth - AUDIO DEMO
Replies: 106
Views: 6038

Re: PROGUE - Analog mono synth - AUDIO DEMO

Yes, this looks fantastic! Happy new year!
B
by Bjarne
Tue Dec 29, 2020 8:52 am
Forum: Music Tech DIY
Topic: OPERA ROTAS, a DIY mutant drum machine BUILD THREAD
Replies: 207
Views: 10650

Re: OPERA ROTAS, a DIY mutant drum machine BUILD THREAD

Agreed. In this case the required patching is so minimal that a small chiclet adapter that plug into the 4n35 together with bridging/removal of the then unnecessary R1/R17 resistors will work a charm (but it will add a little height). The good thing is that the majority of the existing pcb wiring fo...
by Bjarne
Tue Dec 29, 2020 1:54 am
Forum: Music Tech DIY
Topic: OPERA ROTAS, a DIY mutant drum machine BUILD THREAD
Replies: 207
Views: 10650

Re: OPERA ROTAS, a DIY mutant drum machine BUILD THREAD

👍
SphericalSound wrote:
Mon Dec 28, 2020 5:32 pm
Yeah I meant a small adapter, like a midi in chiclet.
by Bjarne
Mon Dec 28, 2020 11:58 am
Forum: Music Tech DIY
Topic: OPERA ROTAS, a DIY mutant drum machine BUILD THREAD
Replies: 207
Views: 10650

Re: OPERA ROTAS, a DIY mutant drum machine BUILD THREAD

Below are some excerpts of the Opera Rotas current use of 4n35 vs common use of 6n137 optocoupler. As I proposed, a small adapter and some hardware patching would be needed to re-assign pins and some of the output circuitry, but I guess it should be manageable using a small protoboard. Then of cours...
by Bjarne
Mon Dec 28, 2020 11:16 am
Forum: Music Tech DIY
Topic: OPERA ROTAS, a DIY mutant drum machine BUILD THREAD
Replies: 207
Views: 10650

Re: OPERA ROTAS, a DIY mutant drum machine BUILD THREAD

That's what I'm referring to as hardware patching. That part is not hard to do. B If I'm not mistaken (I may very well be) it could be feasible to replace the 4n35 with the more commonly used 6n137 optocoupler. This would of course take some hardware patching, but it would not have to be a completel...
by Bjarne
Mon Dec 28, 2020 8:58 am
Forum: Music Tech DIY
Topic: OPERA ROTAS, a DIY mutant drum machine BUILD THREAD
Replies: 207
Views: 10650

Re: OPERA ROTAS, a DIY mutant drum machine BUILD THREAD

Hola! If I'm not mistaken (I may very well be) it could be feasible to replace the 4n35 with the more commonly used 6n137 optocoupler. This would of course take some hardware patching, but it would not have to be a completely separate board (more of an adapter), right? I'm sure I will enjoy the Oper...
by Bjarne
Sat Dec 26, 2020 4:41 pm
Forum: Music Tech DIY
Topic: Another little somthing I've been working on: DR110 inspired 6 voice drum module
Replies: 110
Views: 4021

Re: Another little somthing I've been working on: DR110 inspired 6 voice drum module

Thanks, I totally understand. I was mostly curious about the tweaking capabilities (e.g. bass drum and clap) compared to the stock dr-110 sound. Cheers Any chance of a demo? Cheers I’ve got a track finished up utilizing the prototype of this module where I’m manipulating the kick pitch and it makes ...
by Bjarne
Sat Dec 26, 2020 12:59 pm
Forum: Music Tech DIY
Topic: Another little somthing I've been working on: DR110 inspired 6 voice drum module
Replies: 110
Views: 4021

Re: Another little somthing I've been working on: DR110 inspired 6 voice drum module

Any chance of a demo? Cheers I’ve got a track finished up utilizing the prototype of this module where I’m manipulating the kick pitch and it makes a world of difference. Also the spread function on the clap is just fantastic. It really opens up the prospect of church claps and similar sounds. This ...
by Bjarne
Fri Dec 11, 2020 3:48 pm
Forum: Music Tech DIY
Topic: OPERA ROTAS, a DIY mutant drum machine BUILD THREAD
Replies: 207
Views: 10650

Re: OPERA ROTAS, a DIY mutant drum machine BUILD THREAD

MIDI will be great even if it's done via a separate board.
Cheers
by Bjarne
Wed Dec 02, 2020 6:17 am
Forum: Music Tech DIY
Topic: Adding midi in to my Yamaha PSR-E413
Replies: 13
Views: 208

Re: Adding midi in to my Yamaha PSR-E413

An option mat be to use the Highly Liquid UMR2 board. From what I know it was originally designed for this kind of task but I guess it’s somewhat old, unsupported and poorly documented by now.
by Bjarne
Sun Nov 15, 2020 5:34 am
Forum: Music Tech DIY
Topic: PROGUE - Analog mono synth - AUDIO DEMO
Replies: 106
Views: 6038

Re: PROGUE - Analog mono synth - AUDIO DEMO

Interested in presoldered SMD.
(I bought 5U 606 PCB’s from JanneI previously and they are absolutely beautiful in quality and layout.)
Cheers
by Bjarne
Sat Nov 07, 2020 11:10 am
Forum: Music Tech DIY
Topic: Audio signal processing and coding
Replies: 9
Views: 470

Re: Audio signal processing and coding

+1 for Hal Chamberlin ”Musical Applications of Microprocessors” and Mutable Instrument source code!

Cheers
by Bjarne
Sat Oct 24, 2020 4:32 am
Forum: Music Tech DIY
Topic: LM4250CN replacement.
Replies: 7
Views: 277

Re: LM4250CN replacement.

Hi,

I just noticed that 4250 is also available from electrokit.com (Sweden) and Banzai music (Germany) and I'm sure many more...

Cheers
by Bjarne
Sat Oct 24, 2020 3:11 am
Forum: Music Tech DIY
Topic: LM4250CN replacement.
Replies: 7
Views: 277

Re: LM4250CN replacement.

Hi,

An alternative might be to go with the original Polivoks chips and some modifications of resistor values as mentioned in https://mutable-instruments.net/archive ... /polivoks/ (not sure about what does values should be though).

Ericasynth sells k140ud12 (corresponding to UA776).

Cheers
by Bjarne
Mon Oct 19, 2020 2:30 pm
Forum: Music Tech DIY
Topic: Another little somthing I've been working on: DR110 inspired 6 voice drum module
Replies: 110
Views: 4021

Re: Another little somthing I've been working on: DR110 inspired 6 voice drum module

devinw1 wrote:
Mon Oct 19, 2020 12:47 pm
Bjarne wrote:
Mon Oct 19, 2020 12:31 pm
Thanks,
do you plan to provide schematics for those that buy PCB’s (in case I want to try to figure it out for myself)?
Cheers
Indeed, I always do!
:tu:
by Bjarne
Mon Oct 19, 2020 12:31 pm
Forum: Music Tech DIY
Topic: Another little somthing I've been working on: DR110 inspired 6 voice drum module
Replies: 110
Views: 4021

Re: Another little somthing I've been working on: DR110 inspired 6 voice drum module

Nice! This surely looks like an instense but great build. I wonder if/how feasible it would be to skip the controller pcb and replace it with only sound modification pots and midi trigger inputs for non-euro usage - is the routing between PCB’s clearly defined? Apologies if this doesn’t make any se...
by Bjarne
Mon Oct 19, 2020 10:35 am
Forum: Music Tech DIY
Topic: Another little somthing I've been working on: DR110 inspired 6 voice drum module
Replies: 110
Views: 4021

Re: Another little somthing I've been working on: DR110 inspired 6 voice drum module

Nice! This surely looks like an instense but great build. I wonder if/how feasible it would be to skip the controller pcb and replace it with only sound modification pots and midi trigger inputs for non-euro usage - is the routing between PCB’s clearly defined? Apologies if this doesn’t make any sen...

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