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 Forum index » DIY Hardware and Software » MusicFromOuterSpace.com designs by Ray Wilson
MFOS noise toaster
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manymachines



Joined: Oct 13, 2020
Posts: 6
Location: london

PostPosted: Tue Oct 13, 2020 3:46 pm    Post subject: MFOS noise toaster
Subject description: LFO rate
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hi clever people out there, maybe someone can educate me.
I've built some guitar effects but synths are new to me.

I'm planning to build a MFOS noise toaster, I'd like the LFO to go a bit slower.

Will increasing C16 work? will changing R48 also have an effect?

ta
g
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PHOBoS



Joined: Jan 14, 2010
Posts: 5079
Location: Moon Base
Audio files: 673

PostPosted: Tue Oct 13, 2020 6:01 pm    Post subject: Reply with quote  Mark this post and the followings unread

welcome party!

C16 yes.
R48 has some effect but mostly on the maximum frequency since it is much smaller than R49.
And if you make it much larger than it is now you get a smaller range.

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manymachines



Joined: Oct 13, 2020
Posts: 6
Location: london

PostPosted: Wed Oct 14, 2020 3:13 am    Post subject: Reply with quote  Mark this post and the followings unread

thanks for the welcome and advice!

I'll post my findings when I get round to building it. Smile
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manymachines



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PostPosted: Sun Oct 25, 2020 1:06 pm    Post subject: VCO always modulating Reply with quote  Mark this post and the followings unread

Hello again!

I've now built the noise toaster, pretty pleased with the result but I have one question— the VCO is continuously modulating even when AR mod and LFO mod are turned all the way down. The freq moves up and down slowly, by a small amount not in relation to AR or LFO rate.

Is this normal behaviour or have I messed something up?

Changes I made from the standard build—
subbed R5, R16, R30 2M for 2M2 (couldn't find 2M)

subbed R34 3M for 3M3 (couldn't find 3M)

swapped S4 for 250k log pot to control noise amount

any help much appreciated!
ta
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manymachines



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Location: london

PostPosted: Tue Nov 03, 2020 5:53 am    Post subject: dumbass alert Reply with quote  Mark this post and the followings unread

ignore above post, I realised I had the env mod switch the wrong way round so it was modding the VCO even with the pot all the way down!

Apologies to anyone who spent anytime thinking on this Embarassed
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manymachines



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Location: london

PostPosted: Thu Nov 12, 2020 9:59 am    Post subject: Reply with quote  Mark this post and the followings unread

Hi All, here's some pics of my finished MFOS Noise Toaster, I made the enclosure mostly with hand tools so it's a bit rough and ready but I'm happy with it!

More importantly this thing makes a great variety of sounds from subtle warbling and drones all the way to crazy modulation Very Happy

Posted Image, might have been reduced in size. Click Image to view fullscreen.

Posted Image, might have been reduced in size. Click Image to view fullscreen.

Posted Image, might have been reduced in size. Click Image to view fullscreen.
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PHOBoS



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PostPosted: Thu Nov 12, 2020 2:50 pm    Post subject: Reply with quote  Mark this post and the followings unread

that looks great! Razz

how did you do the graphics, is it printed on or a transparent overlay ?

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manymachines



Joined: Oct 13, 2020
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Location: london

PostPosted: Fri Nov 13, 2020 4:58 am    Post subject: Reply with quote  Mark this post and the followings unread

thanks!

I used dry transparent dry rub decal paper. I printed it off on one sheet but due to my hamfisted drilling, (no drill press), things didn't line up perfectly so I had to cut it up and apply it in parts which was tricky to line up! I used a posca pen to touch it up here and there…
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