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Thank you Bennylein1985, I’m well aware of the sys reqs. I’m a professional broadcast engineer and a veteran of this forum of several years. I’m usually one of the people giving the technical advice on here.
There has long been a known issue with .95 version of BBP which did not happen with the former "stable" version which used to be downloadable from the website. This affects some people and not others and as yet, a solution for everybody has not been found.
A fix for this problem has been waited on for over two years but this was not a problem as I would only install the website version on client’s machines and these have never given a problem.I have found on my various machines a .79 a .91 and .92 versions as well as .95.
I think maybe that the .79 version is the one I need. Hopefully this old version will still work with newer reg codes.[quote author=”bennylein1985″]+/- 75khz so 176000hz are needed min. i think[/quote]
Stereo and RDS will work at 128Khz but very few cards support this. 192 is most common and some can do 176.
Ideally the Breakaway computer will be the last thing before your transmitter.
Your Barix link can only carry L/R audio and if processed before the STL, due to lossy encoding (MP3) the output signal at the other end will not be identical and will contain overshoots.
By using the Breakaway processing at the transmitter end, you can feed the final MPX from the Breakaway PC (including RDS if you purchase Airomate) straight into the MPX input of your transmitter. This will give you the perfect configuration.
This is not true, the E-MU 0404 does support 192KHz at the output, I have used these cards in many machines for MPX output but I have found the following limitations.
When running at 192KHz, the input operates only in mono and also the SNR is not good, you’ll see about -45dB of noise floating around on the input strips as soon as you switch the card into 192KHz mode (This can already be seen in the main mix of the last posted picture). You need to mute the input strips to stop this noise being mixed in to the main output as this will give a very noisy and dirty output signal. If you add input meters to the PCI Card In strips you will see this noise also.
This card therefore, is not suitable for being both the input and output card simultaneously.
For a little extra money, get a secondhand E-MU 1212M, these have higher grade converters and can be used as a simultaneous input and output. You will still need to mute the input strips to stop the incoming audio being mixed straight in to the analog outputs.
I have however stopped using E-MU cards some time ago as I have found the ESI MAYA44PCI or Juli@ cards to be excellent and well priced.
Approx 60Khz audio bandwidth is required for proper MPX operation. This requires a 192KHz soundcard to give this.
A 96Khz soundcard will give very limited stereo image (with no separation in high frequencies) and no RDS.For Breakaway broadcast on FM a 192 Khz souncard is an absolute requirement. This should not cause a problem these days as there are 192KHz cards that can be bought for very little money.
Many PC motherboards include very good suitable onboard codecs such as the Realtek ALC887, which is very popular and common these days. I have thoroughly tested this codec and it has perfect 192KHz operation, full bandwidth and no distortion.Be careful though, there are some bad 192Khz codecs out there such as the ViaAudio ones, they work at 192KHz, I even found they are usually DC straight but their frequency response is very poor and there seems to be some filtering on them as there are notches in the frequency response.
OOhhh, so you have the mic (the part that needs processing more than any other) going to the transmitter raw.. You really need to get that mic processed by Breakaway as that’s what it is for. I’d suggest maybe feeding the mic in the the PC’s soundcard (isolating it from the soundcard output by muting it in the playback mixer and checking it in the recording side) then use a simple program such as Leif’s free audio resampler program to combine the mic mix in with the audio stream from your playout software. It might be a little fiddly to set up in the first instance but once you get it going, it will work fine.
Yorkie.
No, you don’t need a limiter before Breakaway, just make sure you don’t ever clip the input to your PC’s soundcard by allowing yourself plenty of headroom. Putting a limiter before the PC will not remove the likelihood of clipping as you then have to make sure you don’t clip the input to the limiter… at the end of the day, everything has a threshold at which you will clip/distort, you just have to make sure you never get there..
I don’t quite understand how the Mic is not going thru the processor, your mic goes thru the same mixer as your music right?, in which case it is going thru the breakaway processing, otherwise how does it get to the transmitter?
HTH..
Yorkie.[quote author=”KC2IFR”]What is the best audio card to use with windows 7 for use with the AM radio processor. I am a ham radio operator that still uses AM.
Thanks,
Bill[/quote]The BEST card for use with either FM or AM is still the Marian Trace Alpha as it is DC straight and will not need to be calibrated. AFAIK, Windows 7 is supported although maybe not 64bit versions.. Next choice would be ESI Juli@
Rules for FM and AM are much the same for quality although there is no need to use a card capable of 192Khz, or even 96Khz a normal HQ 48Khz card will be fine but may need a small amount of calibrating.PS. Don’t forget to disable the MPX output on the I/O settings to open up the AM specific menus..
HTHYorkie.
[quote author=”rdr”]Yeah, ok.
But 21 is a normal value??
Other users in the forum said that they have the Tilt value adjusted at 2 or 7, using the Juli@ too 😕[/quote]I’ve typically found 3-4 to be the correct tilt for a Maya44 or Juli@ but I always use the same professional trransmitter so I get consistant results, a different transmitter connected inline might give a different result. You did have the transmitter connected too right??
It is also possible that the manufacturer have changed the design, caps etc which may have affected this or it may even be that your scope (or whatever you are using) it not calibrated properly. Did you connect a known squarewave source first such as a parallel port pulsing at 60Hz or a signal generator? If not, then you need to know that your scope is reading flat before setting the tilt.
This all goes to further prove my assertion that there is no one-fits-all tilt value for any soundcard. So many other factors can affect the tilt.
HTH
Yorkie..
Read again my friend…
Features
24-bit / 96 kHz 102dB(a) A/D converter and 24-bit / 96 kHz 108dB(a) D/A converter
4 simultaneous input and 4 simultaneous output channels
microphone preamp with +48V phantom power
Hi-Z instrument input to directly input guitar signals
simultaneous full-duplex recording and playback
S/PDIF optical output, S/PDIF optical input
headphone output
PCIe x1 interface card, works in x1 and any other PCIe slot
full DirectWIRE support
low-latency EWDM driver: MME, WDM, DirectSound and ASIO 2.0 support
compatible with Microsoft Windows XP, Vista 32-bit, Vista 64-bit, 7 32-bit, 7 64-bit
bundled with Cubase LE 5 from Steinberg
