Leif

Did you say there actually is a PC at each transmitter site already, but it’s not powerful enough?

How fast is this PC? Perhaps we could make it work anyway. Latest BBP has a low-cpu mode which runs on a single core atom netbook, in full stereo, with mpx output.

I do know about that brand loyalty, and can only recommend doing your own a/b comparison, with a proper modulation monitor, to hear how much better you could sound with BBP.

Pre-emph at 15 is not a good way. If this is to work at all, pre-emph and de-emph need to be 50, to match what you’ll be broadcasting. That way, most of the peak-limiting work will be done already by the time it hits the transmitter site.

A friend of mine ran BBP at 15us because he thought it sounded better (well yeah, duh) and then 50us pre-emph at the stereo coder at the transmitter site. They ended up with a phone call from the VERY angry inspector from the swedish equivalent of the FCC, and nearly got fined for the extreme overmodulation. This is a heads-up warning — BBP will not do its job unless it’s configured correctly 🙂.

If they had had a proper modulation monitor, they would have seen this themselves, right away.

///Leif

Thanks for the quick reply, Arjen!
Dennis, could you try his suggestion and get back to us?

I recognize Airomate’s signal as the top photo, because of the crap in the skirts below 54 and above 60 kHz. It’s well below the noise floor of FM so it doesn’t matter in practice, but it does look ugly.

Breakaway specifically filters that out of the RDS input, so the output of Breakaway looks more like ST’s output.

Not that it matters, but perhaps Arjen could improve the filters in Airomate for absolute picture-perfect performance? 🙂

Best,
///Leif

[quote author=”Riplee”]Hi guys !

When the new version with the FANTASTIC Eruption preset came out, I figured I’d give it a try…what the heck! Up until that point, I was running 90.69 with no problems whatsoever. I tried the new one, fell in love with Eruption…and after about 4-5 days, the problem resurfaced. So, whatever is going on is in the latest builds…possibly the pipeline as I understand it. I wish there was some way to use the new BL, with the old pipeline…that would be a good test. Perhaps Leif you might compile a "Test" version for this…?
Anyways, I love this new preset so much, that I am willing to restart every so often, so I can continue using Eruption. Is there any way of adding newer presets to older versions, by any chance? 😕[/quote]

You’re running Breakaway Live, right?

I’ve been running it for a week straight now and have yet to be able to reproduce it. Could you record the clicks for me? I’m really getting frustrated — without being able to reproduce it, I have no chance of finding the problem.

///Leif

Hi Pete!

Whichever limiter you plan to use at the transmitter site, I feel extremely confident in saying that none does a cleaner job than Breakaway Broadcast, and believe me — I’ve tried the most expensive ones from the most famous companies 🙂.

Thus, by running Breakaway Broadcast at 50us withe de-emphasis, you will leave as little for the Inovonics to do as possible, and get cleaner on-air sound in the end.

Running Breakaway Live at the studio would not be good as the Inovonics unit would then have to perform the pre-emph limiting and clipping.

However.. As always, the very best solution would be to keep the processing at the transmitter site.

Breakaway is inexpensive enough that you could actually equip each site with a stable computer with breakaway broadcast — likely for less than $1000 AU per site! This has to be in the ballpark of what you’d pay for the Inononics, right?

///Leif

I’m not sure. I’m doing long-term testing on a machine here, haven’t seen the problem yet, but it may not have been a week. An automatic update helpfully restarted the machine the first time, after running for about 5 days. Gee, thanks 🙂.

///Leif

Try reinstalling BBP, that should do it.

///Leif

@Fernando: De nada.

@Boki: ESI Juli@ output tilt is 7, coeff -20, if I remember correctly.
The tool you need to figure this out is a hardware oscilloscope. They’re cheap! Everyone should have one.

///Leif

The Marian Trace 8 has 1/4 inch (6.3mm) connectors.

Use the following two adapters:

Nothing to it 😉.

///Leif