Stereo Tool

I Continue to tested Stereotool on my Radio broadcast, and I want that you have listened as works Stereotool on my Radio.
We must use two radio relay stations, because mountain disturb clear way signal with one radio relay station. And accordingly we have big problem with quality of sound.I hope Stereotool Will solve problems !!! Please listen the 2 demo- 1 is Original from Main Broadcast Computer, 2 is record from air reciever. I do not know why vanish some range of frequency, Are muffled.Advise to me what i should do that is achieved in high quality?

1 - http://www.filehoster.ru/files/cr1093 - original

2 - http://www.filehoster.ru/files/cr1098 - After Stereotool, Record from Air


Please Listen? and try to help me. Forgive for bad English, I used the translator

hi..
Sound 2 poor reception.

First...
- What preset do you use for ST and what version of ST?
- Is you use custom preset post it.
- i supose you have a link connection to transsmiter. So what Link Connection and do you send mpx thru that link ?
- How is link signal?
- if you send mpx directly to transmitter, do you callibrate it to 75kHz?


tip: use lame compression for sound examples at least 192k.

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control point
control point2

This does indeed sound bad.

What Bojcha said, and:

I hear a few strange things.
- Several sounds (especially the bass) seems to disturb the stereo signal. That might indicate a problem with your sound card (sounds may have high frequency harmonics in the stereo signal region).
- The bass is really really loud. That also might indicate sound card problems.

So:
1. What sound card do you use? And are all filters in the sound card turned off?

Note: I'm assuming here that you use Stereo Tool also for the stereo encoding. If you use a separate stereo coder, there must be a problem with that stereo coder.

2. I support you've turned "Pre-emphasize output" on? And are you using the right pre-emphasis for your region?



Note: To rule out any processing setting problems, you could try the following:
- Turn ALL the processing OFF (press RESET)
- Turn FM pre-emphasis (incl. output) and stereo encoding on
- Turn the Final Limiter on, leave the volume at 1.0.
- Turn Hard Limit on.
If you do this, the sound that you receive should be nearly identical to the original. If not, something goes wrong between the Stereo Tool output and the transmitter output (post processing in the sound card, sound card quality or transmitter quality).

Thanks for the replies, will try to explain my problem!
We have used two radio relay stations. The sound quality did not.
So far no money on FM Procesor I decided to try to correct the signal by installing Stereotools. Computer ordinary sound card is integrated Realtek. Pokachto I using a demo version 3.53, preset FM Soft Transmitter-Europe. As you know I am not using MPX.
We have big noise and i use Noise Reduction On 9%.
We would have to know how I can extract the best quality of the program. I don't want losses in the harmonics and frequencies?
Thank You for trying to help!


http://www.filehoster.ru/files/cr2523- This is the preset what i used.

Are you retransmitting the signal from the 1st transmitter at the second transmitter, and is the MP3 from the second transmitter?

Like this:
First transmitter -> First FM receiver -> Stereo Tool -> Second transmitter -> Second FM receiver (second MP3 file)

If so, I guess your reception at the first FM receiver is bad. And with the noise filter set to 9, you will indeed loose some softer sounds - especially if the input volume is also low very. The noise filter can remove some noise, but that always comes at a cost.... Except for that, the stereo noise isn't a white noise signal, which means that the noise gate cannot distinguish it from the actual sound and hence cannot really remove it properly.

Even worse: By using the FM Soft preset, soft sounds (including the noise) will get amplified a bit...

By the way, if you REALLY want to do this (remove FM stereo noise and then retransmit - which is generally NOT a good idea), try my other program Tape Restore Live!, which contains an FM hiss removal filter. See http://www.hansvanzutphen.com/tape_restore_live/ . Given the type of stereo noise that I heard, I think you need to set the smooth/rough slider closer to rough. This program analyzes the sound and really separates FM stereo noises caused by bad reception from other sounds. And then removes them.

My transmit tract is like this:
Main radio mixing console>Compressor dbx166XL>Radio Relay Transmiter>Radio Relay Reciever>Radio Relay Transmiter 2>Radio Relay Reciever 2>Computer with Stereotool> Main FM Transmitter.
The first i want to make Best quality of sound,and after that reduce the noise . I can use the Tape Restore only on final,because only there used computer. I dont used simultaneous Stereotool and Tape Restote ?
I Want to get sound more accurate, but today sound is like cotton wool with overload some frequency...
I understand that my equipment is not quality, but While-that I dont have more money that buy new equipment for fm broadcast

This is probably too obvious but: Do you have an internet connection where the computer is? If you do, transmit the signal there via internet, then you won't get the noise.

About Tape Restore Live!: The SHOULD be placed at the location where the noise is present in your signal - so at the end of the chain (where you're running Stereo Tool now) should be fine.

About equipment quality: I'm using a very simple (but extremely low power) FM transmitter that has cost only 15 euro, and when I use Stereo Tool (including the Stereo Tool stereo coder etc.) with it, the sound is equal or even better than that of the big commercial stations. So it doesn't HAVE to be expensive.

Now i realy interest to recive the signal by Internet.But While-that i choose the equipment for this method of recieve. If you know some kind of this method, please tell me. My transmitter have 500 Watt,and i transmit signal for region 80 kilometers radius.

Main radio mixing console>Compressor dbx166XL>Radio Relay Transmiter>Radio Relay Reciever>Radio Relay Transmiter 2>Radio Relay Reciever 2>Computer with Stereotool> Main FM Transmitter.

That is bad way to get your audio from studio to transmitter.
Did you listen directly your audio from reciver2 .. i bet it's sounds bad.

if you still wont to do it that way...
- try to make signals best you can (transmitter1-reciver1 and transmitter2-reciver2)
- from recivers take mpx directly (just transfering mpx)

so it will look like this:
Mixer > dbx > pc with ST > transmitter1 > reciver1 > transmiter2 > reciver2 > Main Transmitter
Where both recivers have MPX out used for transmitters input.

Like this you totaly avoid to use your hardware stereocoder(s).

But .. again .. this is not good way to send your audio to main transmitter.
Start think about some internet connection (or network to your studio) for PC near Main Transmitter.

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control point
control point2

Hi Hans. You unique who can help me! Earlier I tell that my radio relay stations strongly spoil sounding. Some sounds especially vanish in a high range of frequencies. At use Stereotool the sound became better, but on high frequencies there are problems. How I can return some sounds which vanish? And if that is possible prompt the information about calibration MPX, can this to me will help. And on high frequencies it is audible distortions on hissing sounds - "TH" and "SH"?
I want to get best crystal crearly sound, but dont know how to do this !!!
Help to config Stereo Image instrument !!!, Please try to help me !!!