# EP-3 and M-Audio Oxygen 49 (III)

**URL:** https://forum.moogmusic.com/t/ep-3-and-m-audio-oxygen-49-iii/20880
**Category:** Controllers Forum
**Created:** [April 25, 2020, 3:53am UTC](https://forum.moogmusic.com/t/ep-3-and-m-audio-oxygen-49-iii/20880 "2020-04-25T03:53:05Z")
**Posts on this page:** 4
**Page:** 1

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### Author: ![CedarTree](https://forum.moogmusic.com/letter_avatar_proxy/v4/letter/c/f04885/32.png) [@CedarTree](https://forum.moogmusic.com/u/CedarTree)
#### Post date: [April 25, 2020, 3:53am UTC](https://forum.moogmusic.com/t/ep-3-and-m-audio-oxygen-49-iii/20880/1 "2020-04-25T03:53:05Z")

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I think I have the 3rd Gen Oxygen 49. Connected EP-3 to the sustain input and it behaves weirdly. When I can get it to work at all (switching polarity, etc.) and tweaking with calibration knob, I can at best get either 0 or 127, but nothing in between. I’m a newbie and maybe I need a better keyboard? Thanks.

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### Author: ![hieronymous](https://forum.moogmusic.com/user_avatar/forum.moogmusic.com/hieronymous/32/24_2.png) [@hieronymous](https://forum.moogmusic.com/u/hieronymous)
#### Post date: [April 25, 2020, 10:33pm UTC](https://forum.moogmusic.com/t/ep-3-and-m-audio-oxygen-49-iii/20880/2 "2020-04-25T22:33:26Z")

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Isn’t sustain either on or off? Maybe EP-3 isn’t the ideal pedal to use? (Or maybe I have no idea what you’re talking about!)

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### Author: ![Ledbetter](https://forum.moogmusic.com/letter_avatar_proxy/v4/letter/l/a87d85/32.png) [@Ledbetter](https://forum.moogmusic.com/u/Ledbetter)
#### Post date: [April 26, 2020, 8:02am UTC](https://forum.moogmusic.com/t/ep-3-and-m-audio-oxygen-49-iii/20880/3 "2020-04-26T08:02:54Z")

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You need a sustain pedal, it’s basically a momentary on-off switch. Like this one:

[https://www.musiciansfriend.com/accessories/yamaha-fc4a-piano-style-sustain-foot-pedal/j19485000000000?rNtt=sustain%20pedals&index=14](https://www.musiciansfriend.com/accessories/yamaha-fc4a-piano-style-sustain-foot-pedal/j19485000000000?rNtt=sustain%20pedals&index=14)

The EP3 is a continuously variable control voltage (CV) pedal, usually used for controlling volume, cutoff frequency (think wah wah ) etc. hope this helps. Good luck!

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### Author: ![CedarTree](https://forum.moogmusic.com/letter_avatar_proxy/v4/letter/c/f04885/32.png) [@CedarTree](https://forum.moogmusic.com/u/CedarTree)
#### Post date: [April 26, 2020, 11:49pm UTC](https://forum.moogmusic.com/t/ep-3-and-m-audio-oxygen-49-iii/20880/4 "2020-04-26T23:49:50Z")

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Thanks - how would I connect something like the EP3 to my computer then if I want a range of input?