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 Forum index » DIY Hardware and Software » MusicFromOuterSpace.com designs by Ray Wilson
MIDI for MFOS SoundLab
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sompost



Joined: Aug 17, 2010
Posts: 58
Location: Switzerland

PostPosted: Fri Sep 04, 2015 12:02 am    Post subject: MIDI for MFOS SoundLab Reply with quote  Mark this post and the followings unread

Wassup everybody!

I'm in the process of MIDIfying my small MFOS synths (SoundLab MiniSynth and MiniSynth mk II). Has anyone done that, and if yes: how did you connect the MIDI-CV/gate to your synth?

The original SLMS has 2 CV and 1 gate inputs, and the mk II a "keyboard CV" and a gate.

In case of the mk II, it seems simple enough: CV to CV, gate to gate -- perhaps via switched 1/4" jacks, so MIDI would be disconnected if a CV source was plugged in. Or would you rather use a voltage adder, so an analog CV (eg. from a sequencer) could be transposed via MIDI-CV?

Would you short-cut the two separate CV-inputs in the original SLMS for combined MIDI control or would you keep them separate (even separate MIDI channels)?

In short: How did you do yours?

Oh man, the world is falling apart, and I can't even decide how to connect a few stupid wires...

Ralph

_________________
Built: MFOS SLMS plus, SL Ultimate & Expander, 10 step seq; SLMS MkII; PAiA FatMan, Mutable-Instruments Shruthi-1; Jasper Wasp Clone
Building: Maddox MonoWave; Auduino; ASM-2; Minimoog Clone
Backlogging: MFOS 16 step seq; TH SN Voice; Takeda One Board Farm; Okita Vocoder; Page TR-9090; TH GM Voice, AY Voice
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elmegil



Joined: Mar 20, 2012
Posts: 2177
Location: Chicago
Audio files: 16

PostPosted: Mon Sep 07, 2015 10:24 am    Post subject: Reply with quote  Mark this post and the followings unread

I did a MkII and used switched jacks so I could normal the Keyboard input to the MIDI CV out, and the gate input to the MIDI Gate out.

I could see the point of using two inputs though, should be simple enough to add another jack + resistor going to the summing node for CVs, then you could have the keyboard do transposition and the other input go to a sequencer or such. I would only normal the MIDI to one jack, of course, otherwise you'll double the input voltage Smile
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sompost



Joined: Aug 17, 2010
Posts: 58
Location: Switzerland

PostPosted: Tue Sep 08, 2015 11:18 am    Post subject: Reply with quote  Mark this post and the followings unread

Thanks, for your response.

The either-or-approach using a switched jack that disconnects MIDI when a CV connector is plugged in, seems the most reasonable way to go. I've got an MFOS front panel which includes those jacks so it makes sense to keep those connections. And as for the old SoundLab (mk I), I think I'll turn it into a MIDI-only synth.

It wasn't so hard to decide, after all, with a little help from my friends... Hail the Master

Ralph

_________________
Built: MFOS SLMS plus, SL Ultimate & Expander, 10 step seq; SLMS MkII; PAiA FatMan, Mutable-Instruments Shruthi-1; Jasper Wasp Clone
Building: Maddox MonoWave; Auduino; ASM-2; Minimoog Clone
Backlogging: MFOS 16 step seq; TH SN Voice; Takeda One Board Farm; Okita Vocoder; Page TR-9090; TH GM Voice, AY Voice
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