Stereo Tool

I think this way...
Hans is going to implement gating . Me going to use it .
Me is pretty sure that will help without limiters ( like now) do not forget that we have protection(which even in this preset does not work that much) and hard limiting at 0 db.
Question is to these louder sounds that drops to another level .Higher speeds= higher compression- don`t like this .
Reference=Romanian stations- Europa FM , Still FM, Radio 21 ....etc.. sounds like Sh*t
Clippers would make more distortion then the protection we have before the final HARD LIMIT checkbox.So...
Me is goin to try when Hans announce this implementation, then we`ll see the result....


P.S: in first revision of my preset clippers were ON... at 2.33 , but in this 3rd revision they are OFF.

These post I have found most interesting.

I see the details 6dB mentioned before.... That's a lot. 3dB is twice as loud and 3dB more is twice as loud again. I hear IM distortion after about 5dB of limiting.

Having to much hard limiting after MB defeats the purpose of MB.

As for clippers... never discount them. Without clippers audio sounds to compressed and closed if just limited.

If audio is stored with averaging levels similar to true VU the AGC is almost not needed. Less is more! Except it still has to have gain up its sleeve just incase or if you are not mixing by ear/VU.

I agree with process gating in silent sections of audio throughout an entire air chain.

But it depends if you are processing for fm or digital. For digital my 4 band hardly processes at all. High compressed source material rides my processor very little in the MB stage and more dynamic 80's stuff gets limited and clipped. To many stations store audio to the same peak level not same average/VU/RMS level and drive their processor HARDER with already very compressed modern tracks. That's the number one reason for never being able to dial up a processors sweet spot between each track for short periods between each track. I've seen endless broadcast consoles mechanical VU meters sitting flat in the red then an old track comes along and it's way to quiet. All in the name of a peak meter on a computer the same for every track.

My point is... With digital you still need good clipping And probably less reason for final hard limiting. Just turn the output down a little.... It's not FM it doesn't need to sound like a brick wall with peak meters all perfect in level. It just needs to sound consistent in average level. The first thing I do is adjust my radios volume regardless of how expensive the processor is. And I'll listen to a less fatiguing open digital stream longer than an FM one.

a couple of minor changes that could use this version,

- Changing the sense of control Reduction of ABDP Max Bass, now this value determines the minimum value that can be reduced bass. I think it's much more useful than it is, the maximum amount of gain that can be reduced from the level set to "Always Bass Clip below" or (above (lol)).

- The other is to have an indicator which measures the amount of clipping that is being implemented in the bass.

Edit:
Control "Max Bass Reduction", at the minimum reduction 0%, it is out of range (happens to have a value - 214748, appears to be a 2 ^ 31)

_________________
by GAP
"Less is More" (Bob Katz)

one more ...
In Bass AGC, I noticed that the gain range is poorly distributed.
What I say is, we only used a very small portion of Bass AGC and the consequent problem that when a track requires a little more bass enhancement, remains without profit to do so. But, when there is excess bass, hardly use less than half.
So, one option would be to add a type of "drive" to better match the range of use based on the "target output level"

_________________
by GAP
"Less is More" (Bob Katz)

I have a bunch of updates coming up (most of them are BS412 related, but also sound card calibration!) - still need to check what happened with the sensitivity behavior (higher values are needed now, question is if I should do something about that or the current result is good already).

Anyway, I'll first post that new version with calibrations, then I'll look into the sensitivity again.

Changes in this version:
- BS412 also needs a max deviation (+/- 75 kHz) display --> Added
- BS412 sometimes caused drops of upto 2.5 dB. This is preset dependent. --> Adding a slider with which you can specify the amount of headroom; by lowering the output level by 0.05 dB the margin for error is already increased by 50% which seems sufficient. Test if adjustment adjust compressors properly.
- Also adding a BS412 slider with which the max deviation can be lowered; this way you can create a denser sound (apparently many commercial stations like that even though they don't gain any loudness) and it protects against spikes when the sound card or path to the transmitter isn't perfect (reason: Many current processors usually clip the signal at around +/- 50 kHz instead of 75, so in many cases the path to the transmitter doesn't have to be perfect). (Partially done, to be added: BS412 must take clipping into account; clipping level adjustment for pilot/rds).
- Something is broken in latency 512.
- Different up speeds for louder end result
- Sound card adjustment for low freqs needed (that was on my todo list anyway, but I'm moving it to the top now).

Stand alone: http://www.stereotool.com/download/ster ... 32-002.exe
DSP: http://www.stereotool.com/download/dsp_ ... 32-002.exe
VST: http://www.stereotool.com/download/vst_ ... 32-002.dll
Cmd: http://www.stereotool.com/download/ster ... 32-002.exe

Older changes:
- Bass sensitivity clipping level drop: If there are both mids and highs, the drop is a bit less strong than before
- Bass sensitivity clipping level drop: Determining more precisely when the clip is needed. So instead of dropping the bass the whole 4096-samples block, it's now only dropped at the locations of this block where there really are mid/high freqs
- Bug reported by Phoenix ( viewtopic.php?f=15&t=4235 ) should be fixed.

Planned:
- Check sensitivity


Note: High frequency square waves are NOT good for testing. Use square for low freqs, normal for high (above approx. 100-200 Hz).

When using the new FM Output Tilt control, I assume the FM Output Volume needs to be lowered a couple of db below x1.00 to ensure there is no output overload? Post Amp can stay at x1.00 ? Cheers Aaron

We still don't have "output tilt settings" and should be no need to lower anything since adjustment is at very end, like current "Phase difference" in "FM Transmitter Calibration" section.

Hi Bojcha

The Beta 2 I have just installed (Stand Alone) does have both Input and Output (FM only) tilt settings and test tone generator in Sound Card Configuration. Is it not there in yours?

Re output level, I know when using BBP you must back off MPX output level when using tilt correction. I assume when compensating for the tilt on the output stage of sound card, it would increase the output level being fed to the soundcard, even though the output level of the card drops once compensated. IS that not the same in ST, requiring the MPX output to be set less than maximum?