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Questions about µMPX
https://forums.stereotool.com/viewtopic.php?t=34600
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Author:  PaddyC [ Thu Oct 17, 2024 2:18 pm ]
Post subject:  Questions about µMPX

Hi,
We are currently using Stereo Tool to process the audio at our studio before sending it to our transmitters. We are considering upgrading to µMPX. This brings a few questions.
1- If we buy a µMPX licence, how many transmitters can we feed with it?
2- Can we use two network cards on the same computer, connected to two different ISP, to send µMPX to the same destination, to allow for redundancy?
3- For those who run ST on a Windows PC, how do you stay on air 24h /365 days? Do you block updates? Do you have a spare machine?
Thank you all!
Regards

Author:  stef007 [ Fri Oct 18, 2024 9:53 am ]
Post subject:  Re: Questions about µMPX

Hi PaddyC,
Before we used STT to stream over internet to transmitter.
Now we send µMPX over internet.
1 - License to send is include into STT, but you pay a license to receive (one by µMpx decoder running)
2 - you can configure multiple address/port and choose the network used, then YES
3 - µMPX decoder start not as seervice, then you need to be login in to windows desktop to run it. Yes windows update are blocked. Never had a crash of µMpx.

In our case we have often a disconnect and need to restart STT (encoder) to retrieve the connection. Hope that with rist it will be more stable.

Author:  PaddyC [ Sat Oct 19, 2024 11:07 am ]
Post subject:  Re: Questions about µMPX

Hi,
Thank you very much for your aswers, they are very useful. I got an answer from Hans too and he does confirm what you say. I wasn't aware that I could already use µMPX with a ST FM professional license!
We will test it, I hope we don't get as many disconnects as you have.

Author:  hvz [ Sun Dec 07, 2025 10:39 am ]
Post subject:  Re: Questions about µMPX

Getting disconnects isn't normal, but some routers try to save bandwidth by stopping forwarding of UDP packets if they think the target isn't reachable - which may happen if the connectiond drops out. When it comes back, the router doesn't try to send the packets anymore but just (silently) drops them. The encoder has no way of knowing that this happens, so it doesn't attempt to reconnect.

We have one heard about this issue from a few MicroMPX users, so this behavior seems to be pretty rare. When using RIST, a connection is created so this doesn't happen - RIST will immediately reconnect. So if you have a situation like this and don't want to (or can't) replace the router, enabling RIST will solve it.

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