I'm a long-time Stereo Tool user - for online broadcasts - but somehow I never managed to register an account on the forums!
I'd appreciate any help you can offer on this matter, so let me explain the predicament:
I've been using Stereo Tool since 2014 at a community radio station. We broadcast 24/7 online and we're licensed to broadcast on FM for 100 days per calendar year, so we do about 48-50 weeks on Saturdays and Sundays. Our license permits us to use a local university's student station for our FM broadcast, and the university has been happily on board to let us do that all these years. At some point we'll go out on our own but in the meantime the issue with this setup is that we don't have much control on how things are done on the tx site, so we've basically been sending our processed audio to their studios and a codec handles the streaming to the tx site.
It may go without saying that the sound over FM has always been...well...awful. They don't have much in the way of audio processing and the dynamics of our processed audio are completely destroyed. I believe their tx chain is Codec > Stereo Encoder > RDS > Transmitter (some version of the TX300 - definitely an older one). We've put up with it for years, but I have always wanted ST on-site and I'm going to make a case for that. But first, it has to be tested, and I'm a "n00b" when it comes to transmission/transmitters.
I have a Dell Optiplex 3040 Micro with Ubuntu installed. Stereo Tool (ALSA) seems to be running stable with a Behringer UMC202HD @ 192KHz. So the question is, on the TX300, is it possible using the analog XLR inputs to send in the FM Pilot, Stereo, RDS etc. while disabling the internal processing/encoding? And would I need to disable the tx's Pre-Emphasis, or keep it at 50μs? It's the big unknown for us right now. I know there are MPX inputs and digital inputs, but the UMC202HD is analog, like most consumer sound cards, and I'm hoping someone here will know if the analog XLR ins on the TX300 will do anything with the full MPX out from ST. The overall aim is to unplug the existing Stereo Encoder and RDS and just use ST, but also, until I get up there, I'm not even sure how those units are connected up to the TX300 and what options are enabled and disabled.
So just on the basis of using the analog ins, is it possible to knock off the internal features and for it to work with the ST MPX?
Thank you for any assistance/insight you can provide.