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 Post subject: Stereo Tool 6.32 BETA
PostPosted: Tue Jun 12, 2012 8:25 am 
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Changes w.r.t. 6.31 final:
- 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 ) might be fixed (I'll test it later).

Stand alone: http://www.stereotool.com/download/ster ... 32-001.exe
DSP: http://www.stereotool.com/download/dsp_ ... 32-001.exe
VST: http://www.stereotool.com/download/vst_ ... 32-001.dll

I've measured the frequency content using one of the louder presets, on average (several minutes of music) the highs level dropped by about 0.015 dB and the lows went up about 0.04 dB. This seems to be mainly caused by the mids/highs change, the more precise location determination has very little impact on this.
I'm not really sure about one thing: The more precise clipping level reduction determination means that the bass isn't dropped without need anymore (*), but the drops are also much steeper which could be bad. Feedback wanted!


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PostPosted: Tue Jun 12, 2012 1:05 pm 
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Phoenix' bug wasn't fixed, it's actually worse. I've fixed it now, should be ok in next beta.


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PostPosted: Tue Jun 12, 2012 3:14 pm 
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I want to make some considerations on the ABDP (Bass Distortion Advance Protection)

- I tried different values ​​of control "Always bass clip below", on a sine wave of 50 Hz to verify when it comes to distorting the waveform based on the clipping.

I have recently found that for a value of-6dB is beginning to show a small deformation (which is sought to give more impact on bass).
If one goes down the level of-6dB to-9dB, the distortion persists, but never respects control "Max Bass Reduction", putting any value, the deformation
always remains the same.

Deformation does not vary, moving the control of "Stronger Clipping" from one extreme to another.

- Control "Always bass clip below", this should not be "Always bass clip above", as this control sets the threshold for clipping?

- When setting a value of "Always bass clip below", eg-6dB clipping wanted to achieve, there is no way to compensate for lost gain and the bass are at low level.

- Control "Max Bass Reduction", determines the minimum value to which reduced the bass, or the amount of dB which reduces from the value set in

"Always bass clip below"?

These are some questions that I have left of these controls, you may be wrong in my concepts on these controls.
If so, I apologize, and let me clarify the questions.

regards ;)

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PostPosted: Tue Jun 12, 2012 4:06 pm 
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Quote:
If one goes down the level of-6dB to-9dB, the distortion persists, but never respects control "Max Bass Reduction", putting any value, the deformation
always remains the same.
Max Bass Reduction reacts on 'sensitivity' - it doesn't do anything if there are no tones above approx. 400 Hz. So if you're playing a 50 Hz sine wave it should indeed do nothing.
Quote:
Deformation does not vary, moving the control of "Stronger Clipping" from one extreme to another.
It shouldn't! Stronger clipping just means that the spikes are removed faster (lower strictness value) - at the cost of some audio quality and possible loudness loss.
Quote:
- Control "Always bass clip below", this should not be "Always bass clip above", as this control sets the threshold for clipping?
Ow lol... I meant to say that the clipping level is always below this, so indeed, that means that bass above this level is always clipped :)
Quote:
- When setting a value of "Always bass clip below", eg-6dB clipping wanted to achieve, there is no way to compensate for lost gain and the bass are at low level.
Eh, no, but what do you want to say with that?
Quote:
- Control "Max Bass Reduction", determines the minimum value to which reduced the bass, or the amount of dB which reduces from the value set in
The minimum value to which it is reduced.


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PostPosted: Tue Jun 12, 2012 5:49 pm 
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Quote:
Quote:
If one goes down the level of-6dB to-9dB, the distortion persists, but never respects control "Max Bass Reduction", putting any value, the deformation
always remains the same.
Max Bass Reduction reacts on 'sensitivity' - it doesn't do anything if there are no tones above approx. 400 Hz. So if you're playing a 50 Hz sine wave it should indeed do nothing.
The curious thing is that the tone of 50Hz, reacts, smoothing the top of the sine wave.
Quote:
Quote:
Deformation does not vary, moving the control of "Stronger Clipping" from one extreme to another.
It shouldn't! Stronger clipping just means that the spikes are removed faster (lower strictness value) - at the cost of some audio quality and possible loudness loss.
ok
Quote:
Quote:
- Control "Always bass clip below", this should not be "Always bass clip above", as this control sets the threshold for clipping?
Ow lol... I meant to say that the clipping level is always below this, so indeed, that means that bass above this level is always clipped :)
it always confused me :?
Perhaps it would be good to change it, not the view of the rest.
Quote:
Quote:
- When setting a value of "Always bass clip below", eg-6dB clipping wanted to achieve, there is no way to compensate for lost gain and the bass are at low level.
Eh, no, but what do you want to say with that?
I mean, when the level of "Always bass clip below", this makes the bass down its final level. One low this level to find some desired effect in the bass, but you may need to go below and this makes the final level down.
This should be able to compensate, to bring them to the appropriate level, maintaining the desired effect.
Not if it is clear, that I understand
Sorry for my English (Google Translate, do much for my)
Quote:
Quote:
- Control "Max Bass Reduction", determines the minimum value to which reduced the bass, or the amount of dB which reduces from the value set in
The minimum value to which it is reduced.
In my opinion, would be better if the amount of dB which reduces. To set the value to "Always bass clip below" does not always have to adjust this control. One sets the amount of dB you want to use and then move the "Always bass clip below" to find the optimum point. :)

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PostPosted: Tue Jun 12, 2012 6:07 pm 
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@Hans I have one question.. on previous version before 6.32 the Bass Lower Sens had values up to 9%-10%, in this new version the max value is 5%. is it correct?

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PostPosted: Tue Jun 12, 2012 10:23 pm 
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"Always bass clip below" - Better name/description would be "Maximum bass peek level" (and i recommend maximum level of "-1dB").
Threshold is "Max bass reduction", and i would call it "Maximum bass peek level reduction"

So, if you set "Always bass clip below" to -2dB and "Max bass reduction" to -5, you should have 3dB of bass threshold.
How and why will that threshold work, depend on "sensitivity"
What bass frequency will be lowered depend on "Clip from 0Hz upto" and then drop to no clipping at"

If you don't want to deform constant bass sounds (like 50Hz sine) you can lower "Bass Shape" or change its frequency.

hope this helps :)


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PostPosted: Tue Jun 12, 2012 11:49 pm 
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Quote:
@Hans I have one question.. on previous version before 6.32 the Bass Lower Sens had values up to 9%-10%, in this new version the max value is 5%. is it correct?
Yes, except that they aren't in % but in times (*). I didn't think there's any need for such high sensitivity values (in fact, 5 already sounds really horrible to me), and since there's less room for these sliders than before I reduced the range.


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PostPosted: Tue Jun 12, 2012 11:51 pm 
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Quote:
"Always bass clip below" - Better name/description would be "Maximum bass peek level" (and i recommend maximum level of "-1dB").
Threshold is "Max bass reduction", and i would call it "Maximum bass peek level reduction"
Ah, good one, much clearer, I'll change that.


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PostPosted: Wed Jun 13, 2012 5:34 am 
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Quote:
"Always bass clip below" - Better name/description would be "Maximum bass peek level" (and i recommend maximum level of "-1dB").
Threshold is "Max bass reduction", and i would call it "Maximum bass peek level reduction"

So, if you set "Always bass clip below" to -2dB and "Max bass reduction" to -5, you should have 3dB of bass threshold.
How and why will that threshold work, depend on "sensitivity"
What bass frequency will be lowered depend on "Clip from 0Hz upto" and then drop to no clipping at"

If you don't want to deform constant bass sounds (like 50Hz sine) you can lower "Bass Shape" or change its frequency.

hope this helps :)
Thanks Bojcha, it's more clear.
We should use these texts to feed the Help, and help in understanding the operation of the modules that have no explanation. ;)

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