Stereo Tool :: Stereo Tool 6.10

I agree with Bojcha...
One more question... what is the ORDER on bandpass filter?? and the values 2 4 6 8 ?????

Ah .ok .. i notice few more things:
- Voices are recovered veru good and peeks from recovered voices are high, more then from mid-lows and lows.
- Decliping is very depend of Input level! So, "internal" Double AGCing may fix this. Double: fiist on input and second on output but Vice versa.. to maintain always same level.. internal: inside only for filter functioning.

Checking Standalone:
- Automatic tilt correction or manual? If manual, is there slider for that ?
- Sound is strange (not good) beta19
- This sound is processed by Stereo Tool' still there

At this point, what I can say is that you all have better hearing than I do or are noticing these "improvements" via a signal analyzer, because I cannot hear any sort of difference. It also flat out chokes my system. If someone would like to tell me a track to listen to that I can obtain on my own, then I reckon I can reconsider that point of view...

So, thanks for making it optional...

For an insane example, try this: viewtopic.php?f=16&t=3595&start=15

You'll need to lower the 1st slider to BELOW 8192 (so around 8100 should work great).

Note that declipping uses a lot of CPU processing power (I'll make that configurable later).

The filter can be switched on or off at the right of the input level slider.

The 'maximum peak restore' slider does not work yet (dunny why, will check).

IMPORTANT: Set the 'clipping detection' level low enough such that ALL the clipped samples are recognized as being clipped (for a CD that's easy, 32767 should suffice, but for an MP3 you'll need to set it a bit - even upto 10%! - lower).

Hint: You can see that the declipping filter is working by comparing the input and output levels with NO other processing enabled.

IMPORTANT: Declipping can currently NOT be combined with non-phase linear highpass filtering!!!

Samples that are incorrectly seen as not-clipped (level set too high) can have a big effect on the audio.
Samples that are incorrectly seen as clipped (lever set too low) make things harder because basically Stereo Tool must treat them as if they are clipped at the selected level. So basically you add extra clipping before removing it.

Later I'll add some code for dynamic clipping detection. (Something with a histogram I guess).

Author:	Bojcha [ Tue Mar 29, 2011 5:48 pm ]
Post subject:	Re: Stereo Tool 6.10
Checking Standalone: - Automatic tilt correction or manual? If manual, is there slider for that ? - Sound is strange (not good) beta19 - This sound is processed by Stereo Tool' still there

Author:	Chris [ Tue Mar 29, 2011 6:46 pm ]
Post subject:	Re: Stereo Tool 6.10
I agree with Bojcha... One more question... what is the ORDER on bandpass filter?? and the values 2 4 6 8 ?????

Author:	Brian [ Tue Mar 29, 2011 9:33 pm ]
Post subject:	Re: Stereo Tool 6.10
Quote: I agree with Bojcha... One more question... what is the ORDER on bandpass filter?? and the values 2 4 6 8 ????? 2nd order, 4th order, 6th order, 8th order. It's a math thing...the degree of a polynomial. You can read the wiki entries for it here: http://en.wikipedia.org/wiki/Roll-off http://en.wikipedia.org/wiki/Filter_(signal_processing) http://en.wikipedia.org/wiki/Degree_of_a_polynomial

Author:	Brian [ Tue Mar 29, 2011 9:50 pm ]
Post subject:	Re: Stereo Tool 6.10
At this point, what I can say is that you all have better hearing than I do or are noticing these "improvements" via a signal analyzer, because I cannot hear any sort of difference. It also flat out chokes my system. If someone would like to tell me a track to listen to that I can obtain on my own, then I reckon I can reconsider that point of view... So, thanks for making it optional...

Author:	hvz [ Tue Mar 29, 2011 10:07 pm ]
Post subject:	Re: Stereo Tool 6.10
Quote: Ah .ok .. i notice few more things: - Voices are recovered veru good and peeks from recovered voices are high, more then from mid-lows and lows. - Decliping is very depend of Input level! So, "internal" Double AGCing may fix this. Double: fiist on input and second on output but Vice versa.. to maintain always same level.. internal: inside only for filter functioning. - That makes sense - voices usually have much higher spikes than other frequencies - I'm going to add an option to dynamically detect the clipping value. (For hard clipping, that's easy - the highest value available in the audio. But for MP3 encoded or tilt corrected audio I need to think of something a bit smarter.) When that works I'll also try to let the tilt be determined automatically. (That should be easy: Always try current tilt, tilt plus a bit and tilt minus a bit, and move towards the tilt value which gives the steepest histogram ending.)

Stereo Tool https://forums.stereotool.com/

Stereo Tool 6.10 https://forums.stereotool.com/viewtopic.php?t=3065	Page 20 of 213

Author:	hvz [ Tue Mar 29, 2011 10:12 pm ]
Post subject:	Re: Stereo Tool 6.10
Quote: Checking Standalone: - Automatic tilt correction or manual? If manual, is there slider for that ? - Sound is strange (not good) beta19 - This sound is processed by Stereo Tool' still there 1. Oops - forgot to update the Stand Alone version of the window (yes, again ) 2. That might be caused by the fact that the window doesn't exist - 2 values will be determined completely wrong (I guess it's clipping?) 3. Hm. Odd. Will have to check that. I've just replaced the stand alone version.

Author:	hvz [ Tue Mar 29, 2011 10:15 pm ]
Post subject:	Re: Stereo Tool 6.10
Quote: At this point, what I can say is that you all have better hearing than I do or are noticing these "improvements" via a signal analyzer, because I cannot hear any sort of difference. It also flat out chokes my system. If someone would like to tell me a track to listen to that I can obtain on my own, then I reckon I can reconsider that point of view... So, thanks for making it optional... Hi Brian, If you have good quality input material, you shouldn't get any difference. Unfortunately most 'recent' (last 10 years or so) CD's don't qualify as 'good quality'... For an insane example, try this: viewtopic.php?f=16&t=3595&start=15 You'll need to lower the 1st slider to BELOW 8192 (so around 8100 should work great). About the CPU load: I'll add some options later to change the behavior - you can set it to be 'more sloppy' (might leave some mild distortion) which should lower the CPU load. And I also have some optimizations in mind - but I first want things to work properly before I start optimizing it.

Author:	hvz [ Tue Mar 29, 2011 10:26 pm ]
Post subject:	Re: Stereo Tool 6.10
Bug: First slider doesn't work anymore in BETA19. Fixing now.

Author:	Brian [ Tue Mar 29, 2011 10:28 pm ]
Post subject:	Re: Stereo Tool 6.10
Quote: For an insane example, try this: viewtopic.php?f=16&t=3595&start=15 You'll need to lower the 1st slider to BELOW 8192 (so around 8100 should work great). I took your original wav file and played it back with my normal settings enabled, with the exception of completely disabling bandpass filtering. With the thing on sounds exactly identical as with it off. First slider was set to 8100, as per your suggestion. All I'm getting is just over 2x the CPU usage for no audible difference. DSP version, all 4 latency levels. Edit: The bug might be the issue then....

Author:	hvz [ Tue Mar 29, 2011 11:50 pm ]
Post subject:	Re: Stereo Tool 6.10
BETA620-020: - Declipping: First slider works again - 'This sound is processed by' now really fixed Notes from previous BETA: Quote: Note that declipping uses a lot of CPU processing power (I'll make that configurable later). The filter can be switched on or off at the right of the input level slider. The 'maximum peak restore' slider does not work yet (dunny why, will check). IMPORTANT: Set the 'clipping detection' level low enough such that ALL the clipped samples are recognized as being clipped (for a CD that's easy, 32767 should suffice, but for an MP3 you'll need to set it a bit - even upto 10%! - lower). Hint: You can see that the declipping filter is working by comparing the input and output levels with NO other processing enabled. IMPORTANT: Declipping can currently NOT be combined with non-phase linear highpass filtering!!! Samples that are incorrectly seen as not-clipped (level set too high) can have a big effect on the audio. Samples that are incorrectly seen as clipped (lever set too low) make things harder because basically Stereo Tool must treat them as if they are clipped at the selected level. So basically you add extra clipping before removing it. Later I'll add some code for dynamic clipping detection. (Something with a histogram I guess). Winamp DSP plugin: http://www.stereotool.com/download/dsp_ ... 20-020.exe Stand alone version: http://www.stereotool.com/download/ster ... 20-020.exe VST version: http://www.stereotool.com/download/vst_ ... 20-020.dll VST version (No SSE2): http://www.stereotool.com/download/vst_ ... 20-020.dll Command line version: http://www.stereotool.com/download/ster ... 20-020.exe Linux command line version: http://www.stereotool.com/download/ster ... ETA620-020 NOT AVAILABLE Linux GUI version: http://www.stereotool.com/download/ster ... ETA620-020 NOT AVAILABLE TODO: - Fix loading changed multiband frequencies - Add buffer and filter for SCA output (SCA1 ok, SCA2 ok) - Finish AGC improvement - make mono value configurable (replace checkbox by slider) 1 hour --> NO, not needed - anything else needed? -> NO - Fix Punch - Check what to do with new filters (such as bass AGC) - keep them, remove them, change them? --> KEEP - Save new BASS_AGC setting in VST mode - Loudness: Annoying cracking sound in bass. Slightly present in 5.00, worse in 6.00, maybe even worse in 6.10. Only when bass is too loud. Much worse than in Final Limiter (at same input level!) - so this clearly indicates a bug. Most likely cause: The filter that was added to remove bass artifacts....... - No, it's the louder bass. But it can be fixed by changing some settings. Default settings updated, and behavior for 'not Very strict' improved. Also Deep bass boost and Very deep bass protection are enabled for latency 512 now. - Finish declipping filter. - Add highpass filter for stereo signal (will cause a lot of extra latency!) - Update presets? (BASS_AGC etc.) - Change version number 1 hour - Release 1 hour

Page 20 of 213	All times are UTC+02:00
Powered by phpBB® Forum Software © phpBB Limited https://www.phpbb.com/