Stereo Tool

excellent improvements!!

well done!!!!!!!!!!!!!!!!!!!!!
i am testing the latest version ON AIR

Hi Hans,
Please forgive my ignorance(I guess you've been doing that for some time now!), but I need to know what part of the entire processing chain is pre-emphasis applied for FM tansmission. It's known that to circumvent the noise inherent in FM transmission, specially for high frequencies, the pre-emphasis is applied and the FM receiver on the other end attentuates the high frequencies by an equal amount.

So is the sound that's perceived by a receiver after de-emphasis, the same as that perceived by applying de-emphasis in the StereoTool and converting the output to, say an mp3, and listening to it? Reason I ask this is because the reverberation in bass that I have noticed, kinda disappears when pre-emphasis/de-emphasis is disabled. But then how the local FM stations bring out a bass that's solid even after the de-emphasis applied by the receiver?

The sporadic fluctuations in volume level or pumping is something that's not happening to the entire audio content, rather highs only. So not sure if this has something to do with the new filters that detect voice vibrations and apply corresponding attenuation to bass levels.

One last thing, the preset 'Europe/US FM Tansmitter HOT' - is it designed for some specific genre like trance, party, house or for that matter anything which has very fast tempo? On other genres, I get too much pumping(due to aggressive dynamics in pre-limiter). I like the preset for it's soothing effect and listening ease, but thats one glitch which plagues it at the moment when applied on general music content.

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Is it good except for that?
Any comment on the values?

Bit better .. but still no chance to solve some tracks without "Clip lowest bass at" = ~50
Sometimes it's much better to use non-phase bandpas... maybe there is solution.. not only to push lows down, but to do something to bass curve.. anyway..

I know that "Clip lowest bass at" = ~50 is too low, but maybe not so true, because of "punch filter"! it's still off (?) or not doing nothing.

Questions are..
- where in chain is now "punch filter"?
- is it operate only on bass? What freq?
* It should be between "Clip lowest bass at" and "Then rize to"
* It should operate from 0-350/450Hz

Then it's more important to have "Then rize to" clipp strict (0ms attack/release) to block thus sudden high punch peeks to go over ~90-95%. I'm not sure, Release may be more then 0ms to avoid harmonics, from clipping.

edit:
I just done simple test...
I put thru ST 60Hz sine tone, "Clip lowest bass at" is at 20% !!
In same time 700Hz sine tone lower 60Hz just a bit maybe about 1dB.

All same in BBP .. and result difference is more then double - more then 2dB 60Hz lowered...
it's all about levels.

Hi Hans, is it possible to have some kind of block diagram for this version?

Bit confused here:
- How loud is the 60 Hz tone?
- How loud is the 700 Hz tone?
- Clip lowest bass at at 20%?! That's insanely low...???
- Which settings?
- Do you hear vibrations in Stereo Tool with this?
- If so, doesn't increasing the sensitivity help? (It should! Especially since you say it's all about levels.)

I've started a new build where I have removed a few filtering steps from Loudness, and added a few others. This should give a better result (less pumping effects, 'S' sounds should not lower the mids too much anymore), also the 'highs burst' filter is working again now.

Also, bass causes (very very very slightly) less pumping and (very very very slightly) less distortion.

No big changes, just turned off some filters that were not needed (and probably hurt the quality instead of improving it).

Winamp DSP plugin: http://www.stereotool.com/download/dsp_ ... 510-42.exe
Stand alone version: http://www.stereotool.com/download/ster ... 510-42.exe
VST version: http://www.stereotool.com/download/vst_ ... 510-42.dll
VST version (No SSE2): http://www.stereotool.com/download/vst_ ... 510-42.dll
Command line version: http://www.stereotool.com/download/ster ... 510-42.exe
Linux command line version: http://www.stereotool.com/download/ster ... BETA510-42 (not built)
Linux GUI version: http://www.stereotool.com/download/ster ... BETA510-42 (not built)


EDIT: Just noticed that 'Highs vs. lows protection runs from' (currently set to 300-600 Hz) sounds much better (far less 'S' distortion) at 400-800 Hz.
EDIT: Re-uploaded BETA510-42 with these new settings (400-800 instead of 300-600).

Hans..
Do you still hear voice distortion ?

Voila! No pumping now...thanks Hans for this release. Also the tonality has improved. Definitely the best release thus far for serving my needs.

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Almost none in this 'Mina' track - haven't tested any others yet. Do you?