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@DJ Buik: I don’t know how I missed that diagram the first time around! That looks nice 🙂.
Sfinx: I don’t know about the VIA Envy24. I haven’t tried it. I do know about VIA VT1708B (found on for example Asus P5KPL-AM) and it’s CRAP. If you scope the output when you play a 57 kHz sine wave, the output is nowhere close to a sine wave. This means the card will be spewing ultrasonic garbage into the transmitter. Not recommended.
///Leif
In BBP ASIO, 192000/256 is the best, if your computer can handle it.
Next best is 192000/512.In standard BBP, it doesn’t really matter — it’s nowhere near realtime latency.
///Leif
Buffer size 256 at 48000 is actually quite long.
256 / 48000 * 1000 = 5.3333
That’s 5.3 milliseconds per buffer. You need one buffer for input, one buffer for output, and one buffer for processing. That’s 16 milliseconds of delay — just to get in and out of the computer! We haven’t even done any processing yet. If we add the BBP ASIO low latency algorithm, which is about 12ms, we’re way above the echo fusion threshold already.
256 at 192000, on the other hand:
256 / 192000 * 1000 = 1.33ms
Three buffers of that is 4ms. Add the 12ms algorithm delay, and 1 extra millisecond of buffering delay, and there’s the 17ms I’ve been bragging about. 🙂
You can get the same short delay at 48000 Hz, but you’ll have to use 64 samples per block, not 256.
///Leif
Emano, let us know how it goes 🙂.
Maczrool, bug fixed — http://www.claessonedwards.com/beta/bre … .90.81.exe . Nice catch!
///Leif
Not removing any presets at all, Nick! I only meant I’m not going to bring over all the BBP presets 🙂.
Maybe I should get rid of Radio Magic though.. Would just be confusing to keep it once there’s an "FM-mode", and radio magic was always tuned to be a smashed, bad-sounding preset.
Best,
///LeifWe’re going to try to keep BAE as simple as possible. It would be a nightmare to try to explain all those different presets to people who aren’t broadcasters. Heck, it’s hard enough to explain them to people who ARE. 😉
///Leif
Nope. Why is this necessary for home users, Timmy?
It will however include 50/75us pre-emph, squarewave generator, tilt control, slow sweep generator and the L/R output PEQ with Gain and Width control (frequency will be set to 16k). Not that I’m expecting consumers to have an oscilloscope and a mod monitor, but this way we’ll be able to provide correct calibration values for different common transmitters.
///Leif
Yes, it will have 16 kHz brick wall low pass filtering to protect the pilot, and 30hz high pass filtering. I’ll use the standard 30hz high pass from Breakaway Live / BBP ASIO, not the phase linear filter from BBP, which adds 1/3 second of delay.
///Leif
Actually I’ve been thinking of adding an FM mode to Breakaway Audio Enhancer. This mode would run pre-emphasis, the low latency clipper from Breakaway ASIO, then de-emphasis and finally EQ.
The purpose would be to get near broadcast quality sound from small personal FM transmitters such as the ones you might use to get audio into the car stereo of a rental car, or perhaps just to wirelessly broadcast from your netbook to your stereo system.
Other possible uses would be anywhere you need good LPFM audio from a computer, such as christmas light shows.Restrictions compared to full Breakaway Broadcast:
No straight line input
No MPX output
No pre-emph output
No rock solid peak control (due to no pre-emph output)The restrictions do not matter for the intended use because:
Audio is intended to play from the computer, and if you must, you could get line input through a program like Audio Repeater
MPX output is not necessary for LPFM since transmitters usually have L/R input and built in stereo encoders.
10% peak overshoot does not matter for LPFM, and does not cause IF filter distortion, even though it would be disasterous for full power operation.Best,
///LeifAudiophile, you may not have noticed, but there are actually several different presets in Breakaway, so that Broadcasters can make the decision on what preset to use. There’s also an unlimited supply of plug-ins. Imagine the possiblities.
///Leif
Oops! That sounds like a bug. Obviously I screwed something up when I rewrote the load/save settings code (for performance reasons). I will look into it ASAP — thanks guys!
Please note that this only affects Breakaway Live — i didn’t touch the settings code in Breakaway Broadcast, performance was never an issue there since it has much fewer parameters than Breakaway Live.
///Leif
Audiophile, if I didn’t know better I’d say you just suggested I optimize the audio for boomboxes (i.e. listeners who don’t care) rather than optimizing for proper stereo systems (i.e. listeners who do care). Interesting use of "audiophile" as a nickname. Just sayin’.
The beauty of plug-ins is that they are optional and very much opt-in. There’s just no reasonable arguing with a free plug-in. If you don’t like the idea, don’t download it 🙂.
For L/R agc, Jesse got it exactly right. The needs of an auto balancing plug-in are very different from a AGC, and the implementations are very different.
///Lef
[quote author=”maczrool”]I don’t remember how it was before, but at least in the new Live here, if I apply any EQ headroom, the level is reduced whether EQ is enabled or not. Shouldn’t EQ Headroom only take effect when EQ is enabled?[/quote]
If the EQ headroom was only applied when EQ was on, you’d be blasted out of the room whenever you bypass EQ to audition whether your settings are helping or not.
[quote author=”<em>lpy</em>”]Plutonium, NR, Stereo enhance, this thing’s a monster! 🙂 Love it
But what does the Max atten do?[/quote]
Setting Max Attenuation higher than 0 allows challenger to *narrow* the stereo image if it’s already excessively wide. This is great for listeners who listen to your station in headphone — i would think a lot of people do in bigger cities where people take public transportation to work, and bring their mp3 players or mobile phones with built in fm radios.
[quote author=”Appie”]Nice work Leif !
Works great , compliments !
Tested overhere with a few tracks like : Propaganda – ( duel eye to eye )[/quote]
Thank you 🙂.
///Leif
