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Lumo at a glance

On-Hertz Lumo is a complete mobile radio studio in a simple and intuitive software. It is more than a radio automation system or transmission software. Lumo is intended to facilitate outside broadcasting and bring extreme mobility to radio makers.

"Lumo empowers you to make radio differently."

Main features

General features

  • web-native touch-friendly user interface usable on any recent device such as an iPad, Android tablet,...

Mixing features

  • 4 microphone channels with gain trim, high-pass and low-pass filters, 4-band parametric EQ, dynamics (expander/gate, compressor, and limiter) and panning
  • gain-sharing auto mixer on microphones
  • 3 rundown players with auto replay-gain
  • 1 launchpad player (sometimes called jingle or cart player)
  • 2 stereo "contribution channels" (Phone and Studio) with gain trim, stereo mode selector (LR, LL, RR, and L+R), 4-band parametric EQ and dynamics
  • 2 N-1 bus sent back to contribution sources
  • 2 stereo auxiliary inputs with gain trim, stereo mode selector (LR, LL, RR, and L+R), 4-band parametric EQ and dynamics; typically used to connect an external source such as a DJ mixer, or a live band
  • 2 (post-fader) auxiliary buses
  • a brick-wall limiter on each bus (PGM, Phone N-1, Studio transmission N-1, Aux bus 1 & 2)
  • a routing matrix to flexibly route inputs and outputs channels from and to your sound card
  • 64-bit floating-point audio processing

Playout features

  • import playlist from popular automation solutions or make your own rundown
  • rundown with auto and live-assist modes
  • mix/crossfade editor (sometimes called segue) with trimming and volume envelope edition to fine-tune your transitions + shortcuts and normaliser
  • separated pre-listening player
  • plays most of the existing media file format, performing re-sampling on the fly when necessary
  • build around the popular and ultra-performant PostgreSQL database

Communication (VoIP/AoIP) features

  • a VoIP telephony system (SIP/RTP) with dedicated N-1 bus
  • an IP codec (SIP/RTP) to transmit to the studio, with dedicated N-1 bus
  • an IP mono bi-directional comm channel (SIP/RTP)
  • talkback to phone and auxiliary inputs
  • tone generator to test the transmission line

Quick support guidelines

This user guide is designed to be as comprehensive as possible and should empower you to have a running session of your product quickly.

Should you encounter a case that this guide does not address, please email us at

Continuous improvement

On-Hertz is committed to continuous improvement, to which end the specifications and characteristics of our products are subject to change without notice.

To help us improve our documentation, we invite to report any omission or inaccuracy found in this manual by email to