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Just to clarify, this version is only an interim beta, not a release candidate.
Thanks for the info, I’ll look into the kernel streaming code again!
Best,
///LeifThanks for testing, Maniak!
Just to be sure, the USB headset worked in the earlier versions?
///Leif
Stelios (Sigmacom), I agree with you completely, but I must say I was looking forward to reading Stavros (Camclone) explain his reasoning 🙂.
///Leif
Phase Linear will sound better than Low Latency. However, Low Latency is.. well.. Lower Latency 🙂.
If you must monitor off air then you have no choice — Low Latency is the only option.
But, if you can use the Studio Output for monitoring instead, then you can turn on Phase Linear and get better sound on the air but still have low latency monitoring!
Best,
///LeifHi Ray!
* The output of the processing computer is just 44.1khz on a onboard soundcard and is not a mpx signal. Do i still need to calibrate it? (it had never been done nor was possible with our current processing software).
Yes, you do still need to calibrate it! Your previous software didn’t have the option, but that doesn’t mean it didn’t need it. Tilt must still be adjusted, to compensate for the sound card. You may want to look at the output of your stereo coder with an oscilloscope to make sure that it itself does not cause tilt.
* When i swap the current processing software with Breakaway Broadcast and enable the stokkemasker limiter, there is no use the "zendlijnbregrenzers" anymore, right?
Correct — definitely remove any other limiters. Breakaway takes care of all the peaks on its own 🙂.
Vriendelijke groeten,
///LeifThe coeff does have an effect – you can see it clearly if you turn tilt excessively high and then adjust the coeff while looking at the scope.
PEQ is not available in low latency mode, as phase linear PEQ itself actually adds more latency! If you set it to Phase Linear mode, the PEQ controls will be enabled.
It’s basically a choice one has to make — if you need low latency, you will have to have a good exciter and sound card, which will then not need any PEQ correction.
///Leif
Hi Clive!
I’m glad it’s working! So, what was the problem exactly, and how did you solve it? 🙂
///Leif
Hi Timmy!
FM Mode is a low latency low cpu (but still oversampled and with advanced distortion cancelling) pre-emphasis clipper + de-emphasis. It’s designed to be used with small FM transmitters such as this one:
Or, bigger models in use at Drive-In theaters, christmas light displays etc.
With a decent transmitter, you can actually get close to broadcast quality this way. It’s a nice convenience feature — FM mode only takes 30% cpu on my atom n280-based netbook, leaving enough cpu to play movies as well. It’s a nice way of plugging in to a sound system without wires, whether you’re in a hotel room, at a friend’s house or in a car!
FM mode helps the signal stay within the physical limits of the FM medium, and at no extra cost. Broken S-sounds and distorted hihats are a thing of the past.
FM mode is not a replacement for Breakaway Broadcast, as the output is standard L/R de-emphasised audio. Thus, you must have external pre-emphasis and stereo generator, which all consumer transmitters have, but high-performance transmitters do not, as you cannot achieve perfect peak control this way.
///Leif
So Clive, what’s the actual CPU usage (percentage) while you’re running WMP + Breakaway? I didn’t find that info in your post.
However, from the numbers I’ve seen, something isn’t right. 90% block jitter is huge — it means the audio is arriving very irregularly, and I don’t know why that is. With a huge block size like 2048, jitter should be under 10%!
Power management (running a 2.8 GHz CPU at 0.8 GHz) can definitely cause problems for audio, but I would think that the power management would increase clock speed when necessary to keep up with system load.
I’m afraid I don’t have an answer at all. Perhaps something running in the background is interfering? This is purely guessing though — the only thing I know for sure is that it works on most systems, but I really don’t know what’s going wrong on yours 🙁.
Best,
///Leif
