Re: [AH] Wiring standard for synth expression pedals?

From John Emond
Sent Mon, Dec 10th 2018, 14:34

True, though it is current limited. What would you recommend?

Cheers,

John

Sent from my iPad

> On Dec 10, 2018, at 5:26 AM, Tom Bugs <xxxxx@xxxxxxxx.xx.xx> wrote:
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> "
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> Our Pedz Eurorack module has ground on sleeve, +12V on ring, and wiper on t=
ip.
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> What happens if someone inadvertently plugs a TS plug in? This description=
 would suggest that +12V would be shorted to 0V.
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>> On 10/12/2018 04:05, John Emond wrote:
>> Our Pedz Eurorack module has ground on sleeve, +12V on ring, and wiper on=
 tip. It doesn't work that well with the Yamaha FC7, audio. It works perfect=
ly with the Roland EX5, linear. It also worked well when tested with a reall=
y old Moog passive pedal, again linear. Pedz includes a VCA as well as uni a=
nd bipolar attenuators.
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>> Cheers,
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>> John
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>>> On Dec 9, 2018, at 12:36 PM, Sam Mims <xxx@xxxxxxx.xxx> wrote:
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>>> First of all, there are active pedals and passive pedals, and they are a=
ll called expression, CV, or other names.  The active pedals PRODUCE their o=
wn voltage (so they must be powered), and these are for use with vintage syn=
ths.
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>>> More current products (90s for sure, maybe earlier) use passive expressi=
on pedals, where the pedal takes a voltage generated by the keyboard, and th=
en doles it out back to the keyboard in the appropriate amount (depending on=
 the position of the pedal).  An active pedal will have a phone plug with tw=
o connectors (TS, voltage and ground), while a passive pedal will have a 3-c=
onductor (TRS) phone jack - one for incoming voltage, one for voltage back t=
o the synth, and one for ground.
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>>> The Ensoniq pedal is passive, and there are definitely two flavors of pa=
ssive pedals.  If I recall correctly, one uses a linear pot, and the other u=
ses an audio-taper pot.  I remember once on the road some of our gear got st=
olen, and I had to use a Yamaha expression pedal with my Ensoniq boards.  Al=
l the =E2=80=98business=E2=80=99 of the pedal happened in just a few degrees=
 of travel of the pedal.  So while you will get results using the wrong type=
 of pedal, they won=E2=80=99t be usable in a practical situation.
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>>> I have not, though run into a situation where the pedal is wired differe=
ntly=E2=80=A6
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>>> Sam Mims
>>> Syntaur
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>>>> On Dec 9, 2018, at 4:22 AM, Thomas Strathmann <xxxxxx@xxxx.xxx> wrote:
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>>>> On 09.12.18 08:24, Brian Willoughby wrote:
>>>>> I just ran into a situation where my Ensoniq Expression Pedal is not c=
ompatible with a new USB-MIDI controller. Is there one standard for wiring a=
 passive expression pedal, or is there more than one?
>>>> Yes. My expression pedal has a switch to select different configuration=
s. It's the same mess as with sustain pedals.
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>>>>    Thomas
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