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License validity

License validity

Licenses are valid for life, including software updates. New features may cost extra if you want to use them.

MicroMPX licenses are coupled to the hardware, so they can only run on one device. If a device breaks, you can ask us for a new license for your new hardware.

You can verify that MicroMPX works in your environment without a license, the non-licensed version inserts tones in the audio occasionally, but is otherwise fully functional.

Extra features

Single Frequency Network: GPS synchronization

If you have a single frequency network (SFN), you will need the GPS synchronization addition for the encoder and for all the decoders that require this precise synchronization. Any other decoders can use a normal license, you can leave GPS synchronization off in those.

Please be aware that GPS synchronization is currently not standardized between our software encoders and decoders and the hardware devices from other manufacturers, and that not all of them will even support GPS synchronization.

MicroMPX+: Lower bitrates

If even 320 kbit/s is too much for you, MicroMPX+ offers even lower bitrates, all the way down to 176 kbit/s.

Please be aware that, especially at the lowest bitrates, certain benefits of MicroMPX might not be fully available. MicroMPX was made specifically for FM, which means that if it cannot encode at full quality, it adds artifacts that sound like FM reception artifacts, instead of way more annoying MP3/AAC-like artifacts. At low bitrates, this can become audible. MicroMPX+ includes information about those codec artifacts so the decoder can filter them out. That works very well, but the filtering can slightly change the waveform (*, moreso if the bitrate is lower), due to which we cannot guarrantee that a fully ITU-R.1268 (AKA "Stokkemask") compliant signal will still be compliant on the other end. Most audio processors don't even offer this feature, but for example Stereo Tool and the Omnia.9 do. While even a 176 kbit/s encoded Stereo Tool signal with ITU-R.1268 enabled will still be much closer to ITU-R.1268 than a signal without this. As far as we are aware, compliance to this standard is only mandatory in the Netherlands and Belgium.

(*) Changing the waveform can also cause small overshoots, but it's typically only a single sample that's too high, and we compensate for that using a very simple clipper - the effect isn't audible and because it only affects a few 1-sample spikes it doesn't affect loudness.