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Author Topic: Your DIY  (Read 7749 times)
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V-A
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« on: March 24, 2015, 04:09:09 PM »

These are mine best sounding DIY instruments so far.









« Last Edit: March 24, 2015, 04:36:25 PM by V-A » Logged

tiny_tove
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« Reply #1 on: March 24, 2015, 04:25:31 PM »

wow

a simple spring machine powerd by crank sturgeon silo microphone

https://www.youtube.com/watch?v=VGyTk9HI-Ek
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Cementimental
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« Reply #2 on: March 24, 2015, 04:55:12 PM »

V-A those look great :)

At the moment I'm still most proud of my active matrix mixer even tho i was too lazy to figure out the circuits to power it in a more sensible way so it runs off 2x 9v batteries ( soon to be upgraded to even more stupidly run off 2x 12v power supplies.) :D One of the most elaborate pieces of electronics i've built completely from scratch anyway and really useful for overly complex feedback systems as well as general mixing.

don't have good photos to hand but


Need to build many more things soon! All sorts of half finished/started projects lying around
« Last Edit: March 24, 2015, 05:00:37 PM by Cementimental » Logged

Zugzwang Productions
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« Reply #3 on: March 25, 2015, 04:34:58 PM »

Nice pint Tim !

And yeah V-A, your instruments look awesome and very fun to play ! Do you have soundclips ?

I built some instruments similar to yours, with springs and strings. I need to take better pictures of them.
I also have DIY tape loops but I'm not going to spam that over again. :)
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pentd
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« Reply #4 on: April 09, 2015, 07:21:36 PM »

tim, whats the difference between passive and active matrix mixer?

V-A --- o la laa!!
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Cementimental
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« Reply #5 on: April 10, 2015, 07:28:20 PM »

A passive mixer (matrix or otherwise) just uses resistors + variable resistors to mix signals. That works but there are various issues, the overall sound comes out quieter etc. It's a 'good'/correct way only to mix low impedance signals eg direct from microphones etc. Line level/amplified signals will still more or less work tho. An active mixer has buffers and/or preamps to solve various impedence etc issues that i don't fully understand, and to make it possible to add gain. Before i made mine active i could still make feedback loops but had to use a lot more boost/distortion pedals; delays, phasers etc don't add much or any gain so it wouldn't feed back at all. I tweaked mine to go above unity gain (i forget/never fully understood exactly how much gain i added but i modified the schematic to have a bit more than usual) so it can feed back on it's own, you can even do pure no-input mixing.

Two things which passive mixers can do but active ones can't, which can be useful for our sort of purposes, is a) work backwards, ie act as a splitter rather than a mixer. b) mix modular synth control voltage signals (well, it's possible to build active one which does but normal powered audio mixers won't I don't believe)

Good introduction to how basic mixer circuits work: http://sound.westhost.com/articles/audio-mixing.htm
« Last Edit: April 10, 2015, 08:00:47 PM by Cementimental » Logged

Vermin Marvin
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« Reply #6 on: April 29, 2015, 10:47:51 AM »

Noticed this in some gig earlier, seems that Finns have thing for circularsaw blades..
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online prowler
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« Reply #7 on: May 01, 2015, 10:09:06 PM »

These are mine best sounding DIY instruments so far.





This is a very interesting thread that I will follow. Good initiative.

The instruments featured here in photos are like works of art I have to say. Could be exhibited... Keep on posting folks!
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