VX-351 outputs -5V
VX-351 outputs -5V
As per the manual, my VX-351 sends -5 to +5V on its vel, pressure and mod wheel outputs, among others. This seems a bit odd and non-standard. The modular gear I'm connecting to expects 0-5V. Do I need to build a set of level shifters, is there a secret hidden switch to change the levels or am I missing something obvious here? Thanks
Re: VX-351 outputs -5V
ps I'm an electronics engineer and I think my preference here is to modify the VX internally. Is there a schematic anywhere? Thanks
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Re: VX-351 outputs -5V
Why do you want to do this? Are you trying to get the full sweep of the knob to operate between 0 and 5 V? That's more involved then a simple blocking diode. The voltage of these signals is generated from the Voyager, not the VX-351. If you're planning on modding the VX-351 which is a passive device you'd probably need some kind of power supply for active components needed to level shift the signals.
You never anticipate having external modules that need -5V to +5V? Are you aware that most of the the Voyager CV inputs operate between -5V and +5V?
Btw schematics for Moog products are not made available.
You never anticipate having external modules that need -5V to +5V? Are you aware that most of the the Voyager CV inputs operate between -5V and +5V?
Btw schematics for Moog products are not made available.
Re: VX-351 outputs -5V
Why? I said: The modular gear I'm connecting to expects 0-5V. I want zero aftertouch to give zero CV modulation.
The VX-351 DOES receive +/-15V from the accessory port so I could add active circuitry if I wanted.
Moog do not make schematics publicly available but someone somewhere does have some and maybe they are available unofficially somewhere...
I have added four level shifters in the back of my modular rather than inside the VX where space is more limited.
The VX-351 DOES receive +/-15V from the accessory port so I could add active circuitry if I wanted.
Moog do not make schematics publicly available but someone somewhere does have some and maybe they are available unofficially somewhere...
I have added four level shifters in the back of my modular rather than inside the VX where space is more limited.
Re: VX-351 outputs -5V
This is precisely why MIDI was invented: there has never been an industry standard on CV ranges and trigger voltage/polarity.
Like everyone else since the 1970s, you had to build converters to get synthesizers to talk to each other.
Like everyone else since the 1970s, you had to build converters to get synthesizers to talk to each other.
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Re: VX-351 outputs -5V
Ah ok - makes sense. I was thinking more about the "among others" . I typically run these VC signals into VCAs for level shifting/bias but understand not everyone wants to spend the money or take up space on these type modules.stevehunt wrote:Why? I said: The modular gear I'm connecting to expects 0-5V. I want zero aftertouch to give zero CV modulation.
The VX-351 DOES receive +/-15V from the accessory port so I could add active circuitry if I wanted.
I have added four level shifters in the back of my modular rather than inside the VX where space is more limited.
Didnt know about the +/-15V on the acc. port - tnx.