# \[S37\] NFR Mod source for multiple keys pressed

**URL:** https://forum.moogmusic.com/t/s37-nfr-mod-source-for-multiple-keys-pressed/19473
**Category:** Moog Beta Forum
**Created:** [November 12, 2017, 9:59am UTC](https://forum.moogmusic.com/t/s37-nfr-mod-source-for-multiple-keys-pressed/19473 "2017-11-12T09:59:52Z")
**Posts on this page:** 1
**Page:** 1

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### Author: ![HansH](https://forum.moogmusic.com/letter_avatar_proxy/v4/letter/h/ed655f/32.png) [@HansH](https://forum.moogmusic.com/u/HansH)
#### Post date: [November 12, 2017, 9:59am UTC](https://forum.moogmusic.com/t/s37-nfr-mod-source-for-multiple-keys-pressed/19473/1 "2017-11-12T09:59:52Z")

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Hello,  
New Feature Request: a mod source that is low when a single key is played and high when 2 or more keys are pressed. Use case: if you play in duo mode playing a single note will play both oscillators at the same pitch. Tonal character is different than the single notes you hear when played 2 keys. The proposed mod source would allow to lower say the mixer level of the second oscillator when playing a single note.  
Another potential use case is the detection of legato playing and so use this for modulation purposes (eg raise filter resonance)

Cheers  
Hans