Vocoder Begins

jurgen haible living vocoder

this project is finally coming together

most parts are on their way and i have done a preliminary panel design

having a huge internal debate whether a patch matrix is necessary and i haven't included it in my current design. I have a thought of having it on the back of the case. as you can tell the design is still in flux.

i think i need to borrow a nord modular and test it out

here is the current panel design draft

im reasonably happy with it - i think ill adjust the signal flow space so it is a little tighter. with this panel design i'll need a bit of extra circuitry including 

• speech input amp - line input
• speech input amp - led bar graph 
• excitation input - led bar graph

im also bringing almost every option onto the front panel except the patch matrix.... mmmm

the plan is to make a panel pcb - even if i end up etching one. i think i am coming around to the idea of panel pcbs and no wiring. it will take a lot of effort but hopefully it will make the unit easier to service and live longer. 

so waiting on parts and should begin once they arrive. i will build the unit and test some of the mods before builiding the panel. most likely i will get the front panel fabricated as part of the case. no idea how to get the decals on as it is way too big for my normal lasertran technique.  

Jurgen Haible FS1

it has been a while between posts - travelling the world and having fun back in a house in my home town and the studio is back together working on some new toys currently hoping to complete the jurgen haible (rip) FS1 frequency shifter here is my design


edit:

Here are my dome filter picks

I have added to jurgen's speadsheet to measure the time constant different between ideal and measured. My resuts were ok - not as good as I would really like but I cant be bother ordering more components.

I found that there is a lot of play when choosing values - it helps to have a lot of resistor values on hand to match together. I would recommend buying capcitors that are not 1% and make sure you get a few of them. The capacitor value add magnitude to your final result so in cases where you have a good resistor match but the capacitor value is large it can bump up the final error. Having a bunch of capacitors at slighly different value gives you more options of resistor combos.

edit 2:

I managed to get it to fit well into a case. Time to wire :)



Neural Agoniser PCB block diagram

I am doing a some servicing of my synth before i hand it over to a friend to look after while i go overseas. There were a couple of noisy sections in my NA which i wanted to resolve. I created this diagram to help me work out what is what. I hope it helps others also..

Images from my VJ set @ ascension engine

I snipped a few screens from my quarts composition to add to my soundcloud file and thought i most post here before i delete - i just found out that my set and projections will be included on an upcoming release so stay tuned

Something for future live gigs

Working on a new project based on the syapse serge touch keyboard and programmer circuit. My CGS programmer has been such an amazing tool. This will hopefully become and amazing controller for my modular.

First section of the pcb almost done :)

Truant Live @ Ascension Engine

Truant live @ Ascension Engine 26-3-2011 by prblmchild

Great day

Really happy with my performance and I was very much greatful for the presence of an audience to see my set even though i was the first to perform. Thanks to Scott for running the event. Some outstanding performances, the highlight for me being Grist and Zen Paradox. Video was recorded and hopefully when Scott gets some time he can snip and upload my section.