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PostPosted: Tue Mar 13, 2018 9:58 am 
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Joined: Mon Mar 17, 2008 1:40 am
Posts: 9448
THIS BUILD IS BROKEN ON MACHINES OLDER THAN AN i7-4000 SERIES!

Stereo Tool 8.55 BETA040

Windows 32 bit:
Windows stand alone: http://www.stereotool.com/download/ster ... 55-040.exe
Winamp DSP: http://www.stereotool.com/download/dsp_ ... 55-040.exe
VST: http://www.stereotool.com/download/vst_ ... 55-040.dll

Windows 64 bit:
Windows stand alone: http://www.stereotool.com/download/ster ... 55-040.exe
VST: http://www.stereotool.com/download/vst_ ... 55-040.dll


CHANGES:
- Added Basstardizer lowpass filter for output
- Make VST plugin error catching work again.
- Optimized new compressor modes, created separate code paths, put values in a lookup table. Performance vs. legacy mode: Auto EQ 5% faster, AGC same, Symmetric RMS vs RMS 7% faster (if not using Exponential Release, Spectal Balance Compensation etc), Symmetric Peak vs Peak 54% heavier (because it's now based on Symmetric RMS mode instead of Averaging mode, and all RMS modes are heavier than Averaging modes). Compared to BETA037 the performance is 13% better for the Symmetric modes.


OLDER CHANGES:
- Fix Basstardizer crash
- Fix Basstardizer right window shape
- Fixed Digital Multiband 1 mode Flat frequency response bug introduced in 8.54.
- Fixed Symmetric Peak
- Fixed an issue in Symmetric Peak and Symmetric RMS mode with Feedback^2 enabled, for very fast attack times the Shape is higher now to avoid overreacting.
- Fixed Basstardizer: The threshold calculation was completely wrong, it worked fine on constant bass but not on dynamically changing bass.
- Basstardizer: Make Effect strength slider relative to Headroom (which turns into Harshness) - At higher Softness settings Lookahead now controls punch!
- Fixed DLL closing issue (in Audition and other programs; calling a DLL close from program close caused a hangup)
- Added mono bass fiter to reduce multipath
- Added extra protection mechanism to avoid insane release speeds. For MB, MB2, SB Compressor this can be switched on/off for testing - I will remove the checkboxes once tested.
- Relative release threshold was not calculated correctly for FB and FB^2 modes.
- Moved RECOVER_FROM_NAN outside of adjustChannel_internal_linear_attack_release_feedback_peak_peak_gate_limit to fix compiler crash.
- Bass mono fiter to reduce multipath Done, but parameter needs to be controllable separately.
- Added Symmetric Peak mode. Not at all tested yet!!
- Added Stop Threshold values for multiband compressors. They were already there for the singleband compressors, but not yet for multiband!
- Symmetric modes were visible for Digital compressor but not supported by Digital mode!
- Added "Relative release threshold" slider; removed Symmetry slider. For all dynamics processing things (so LLB, AGC, Auto EQ, compressors). Not 100% sure yet if this is a good idea for Auto EQ. See text below (*)
- Max release speed fixed
- Basstardizer: Fixed issue with difference between left and right
- Crash reported by near05 (fixed?)
- Improved external RDS insertion to allow for noisy RDS signals (some encoders (actually apparently from one specific brand) generate a pretty bad signal, which was rejected by Stereo Tool).
- Added sound card lowpass filter compensation to FM output sound card (so now beside tilt for bass there's also something for highs). NOT YET FINISHED, may cause weird behavior. It will work in many cases, but not in all. Does not work when "Ignore high frequencies" is used. Description will follow when finished.
- New compressor mode. Check all weird settings, optimize, new peak mode, remove faster attack/release, add setting for max release, fix max attack/release speed controls. Things to check: "Peak", "Peak mode", "Feedback", "Feedback^2", "Exponential release", "Max attack speed", "Max release speed". New mode is called Symmetric RMS, there's also a Symmetric Averaging but I will probably remove it because it's not useful. MORE INFO BELOW!
New AGC mode MORE INFO BELOW!
New Auto EQ and Bass EQ mode (not switchable in Bass EQ since that's new anyway). MORE INFO BELOW!
- RDS: Add PTYN
- RDS: Add timeout for TA
- Improved multipath protection
- Improved Stereo Image phase limiter
- Revisit new Hard Limit / Final Limiter with Matt & Wes - Settings removed Waiting for final feedback.
- MPEG detection is too insensitive now -> Probably fixed Waiting for feedback
- UECP UDP mode Waiting for feedback
- TA/TP via MagicRDS. Auto-enable TP if TA is used? (no)
- Added THIMEORT in ASCII RDS mode.
- Spectrum displays are broken in 4K mode
- Compressor/limiter on input before AGC to handle extreme sounds? / 2nd AGC with higher threshold for voice tracks Added, may need new mode. Waiting for feedback.
- Add auto save to Linux build Waiting for feedback
- VST delay appears to be wrong - Phase Delay and Threads
- VST version no 4K
- Backup input - fix overshoot display
- Backup input - check stereo
- Fix web server long URL issue Test release mode needed
- Scrolling through presets in 4K mode locks screen (crashes).
- Pilot-only output for 9 , works but needs to be sent back to O9SG
- Self test crashes
- Fix affinity for Linux and Mac - Mac doesn't support it.
- Edwin's bass effect - is that done now? (Maybe an extra HPF?) -> Not needed for now, based on preliminary tests...
- Put Bass EQ under license
- Do we need multiple Basstardizer bands? -> Doesn't seem like it. Not for now.
- Remove Hans mode from Bass EQ? -> Hid it (Extreme Tweaker mode, Matt mode is default, made it a pulldown instead of a boolean to clarify its behavior).
- Octaviafm extra logging? - Waiting. Once we know the cause I'll run a new build. But I'm not going to hold off releasing the current version, since 1. this issue doesn't have any side effects anymore and 2. it very likely isn't new. -> Nothing heard anymore
- Would multiple where_i_am start points improve attack? YES!!!! Think about how to implement it...
- Enabling low latency output caused crashes
- NAN recovery added to Basstardizer
- Top area of GUI made a bit higher, not all menu items fit before
- Bigger font and widgets on 4K screens
- Added Basstardizer
- Remove warnings that were shown for things that weren't even enabled.
- Fixed NAN in 8.54 in several versions in the clipper (reported by 1 person, appears to have been settings-related).
- Matt's bass effect Ready to get feedback, see "BASS EQ" before or between multibands! See note below.
- Fixed Mac multiband compressor gate error after NAN recovery.
- Add Breakaway Pipeline warning
- Add low input level warning
- Add too little AGC action warning
- Add too much noise gate warning
- Add too much BS412 action warning
- Added ASIO latency setting.
- Made streaming with libVLC easier, WARNING though, the audio quality is still the VLC streaming audio quality, there are better encoders out there. This only affects the stand alone versions.

TODO:
- NAN seen when switching to new compressor mode which also doesn't get recovered - silence afterwards. (Peak mode recovers it though). => Not seen since, must have been something in the earliest version of it.
- 4K mode line spacing bigger for presets
- Make default window size bigger for 4K
- Fixed threading issue that was introduced in Sudden Jump Protection a few beta's ago.
- Auto EQ move where_i_am back to close to min/max settings to avoid insane response times without SJP
- Minimum window size in 4K mode
- Bass EQ first band might not go down fast enough
- near05 VST crash
- New skin
- Select instance with command line option
- Make pilot generation smooth for external feeds for DARC etc.
- MB2 band coupling bug: something is wrong, check better-fg-plus.sts -> Seems ok now. Weird.
- Check Auto EQ behavior on sudden level changes, and initial Auto EQ behavior after startup
- Test NanoPi
- Classical preset
- Is pre AGC affecting audio levels? (With BS412) -> Not specifically for BS412, but it slightly reduces the level even if set a lot higher. Probably needs some offset.
- Aanvraag uren
- Add AM presets
- Check MB2 1% something (see FB chat about crackling sound, which was ok in 8.00). Test with Rhodes54 preset -> Ok. But Spideys Web (7.41 vs 8.54) is different, let's test that.

- Basstardizer fadeout (Edwin)?
- AM streaming output
- Multi-instance version
- WatchCat: Use "Simple Clipper" for R128 normalization if there's no license for Advanced Clipper.
- WatchCat/Generic plugin: Respond to latency request with different number for step 1 and 2
- AF method B via UECP
- "Stereo Width" in Stereo Image is broken - it causes phase problems if you're using it to go to mono with silence on the other channel. This can be made smarter!
- True Bass puchier - filter out start
- 18 Hz trigger tone
- Declipper check L-R effects
- Reduce extreme stereo
- Raspberry Pi "gedeelde bibliotheek" melding.
- Check out Butt
- Add libVLC instability warning
- Loudness meter (also for streaming)
- Omnia.9 set Stereo signal. Probably fixed? Wait for answer.
- Omnia.9 test/fix logging
- Omnia.9 AutoPilot add flag for generating noise above pilot?
- WatchCat website
- Triple stuff
- Thumb up/down in GUI for presets

- SCA2 use as backup, feed to output without processing, bypassing normal chain. Use to have FM receiver as backup, and then just feed the full signal to the output.
- uMPX 24x2ch interface
- One bass page

- GUI: Hide disabled stuff, far less confusing / much cleaner interface.
- Talk to chip
- 2 jaar
- Fardau
- -24 dB side chain range?


NOTE: Bass EQ
1. This thing should not really be needed because there's already Auto EQ. However Matt Levin insisted that it's useful, especially now that they are playing very old Christmas music, so let's try it out!
2. There are 2 modes: Matt Mode (see checkbox) or Hans mode (unchecked). In Matt mode, the highest band is not adjusted but it is used to determine the levels. So in the last stage, the highest band is in bypass mode, but the other bands respond as if it's working as well. So the bass is adjusted compared to the full spectrum. In Hans mode, the highest band is ignored completely, so if you use 2 bass bands, they are adjusted to match each other, but not the rest of the audio.


New compressor mode info:
About 3 years ago I wanted to redesign the whole compressor based on how water pressure control systems work. The whole idea was to have a compressor that moves fast when it has to, but stands still when it can. And that it would behave 'naturally' - it's something that you could actually build with real components (if you treat water pressure as audio levels).

This appeared to work pretty well. If you play a dynamic track, the compressor acted fast, and if you play an already compressed track it does nearly nothing. This is great - because it doesn't add 'restlessness' to already compressed audio, which would lead to listener fatigue.

Short summary of the rest of this text: It never worked as I envisioned! (And I never even realized that). But now it does!!

Some people have complained about the attack sometimes working too fast - which was mainly noticeable in loud 'S' sounds. The fast attack with much slower release could cause a 'gap' in the audio after the S. But I figured that that was a more or less logical consequence of the the whole act-fast-when-you-have-to idea.

Now fast-forward a bit. Last year, 2 people (Wes Keene and Matt Levin) were working on a preset together with very high compressor ratios and they noticed that in one particular track, a vocal which was originally louder than the surrounding sound actually came out softer. Well, that's not good. It sounds really annoying and broken. After looking into it I found out that my design was actually not - as I had thought - controlling the level based on RMS levels, but based on average sample levels. In most cases that's closer to RMS than peak, but it's not perfect, and as it turned out, in some cases flat out wrong.

So, I added a new mode that actually controls things based on RMS levels. And - different than many traditional compressors - it would control based on RMS levels regardless of whether it's long time or short time levels that you're looking at. Typically, a compressor would use some window over which it calculates the RMS level, and then control the audio based on that. That works great for most content, but if you play a track that for example has a very loud kick every second or so, the RMS window won't help a bit and your long-term level will probably be too low.

So I created a new RMS mode, renamed the old one to Average mode, and thought I was done. But, the problem with loud "S" sounds has gotten way worse! And it was even worse than that: Release was slower than before. So to fix that, I added some "patches": "Big release speedup" and "Big attack slowdown".

This new mode doesn't need that anymore. It's completely symmetrical, and it's still RMS-based, both on short and long time intervals! It still moves slowly when it can and fast when it has to - but not insanely fast if the attack is really big. And release isn't very slow anymore.

Since attack and release speeds are now virtually identical for RMS and Average mode, and you probably prefer RMS levels over Average levels, the new "Symmetric Average" mode is basically useless. I've put it in for now for testing, but I'll remove it afterwards.

The AGC and Auto EQ were suffering from similar issues, and I've fixed those too. There you can just disable "Legacy mode" - if I'm not wrong, the new mode should be better for any purpose than the old one.

Important: The CPU load is really high right now. I will optimize it later.

Also important: You can't just enable this new mode and expect everything to be fine without changing the settings. For small level differences there won't be a difference, but there will be for big differences. You'll definitely notice the slower attack on big level jumps.



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PostPosted: Tue Mar 13, 2018 10:28 am 
User avatar

Joined: Fri Mar 09, 2018 1:31 pm
Posts: 44
Hello Hans,

When I launch the application displays this error message
Attachment:
Capture.PNG


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PostPosted: Tue Mar 13, 2018 10:52 am 
Site Admin
User avatar

Joined: Mon Mar 17, 2008 1:40 am
Posts: 9448
Quote:
Hello Hans,

When I launch the application displays this error message

Capture.PNG
THE PREVIOUS BUILD IS BROKEN ON MACHINES OLDER THAN AN i7-4000 SERIES!


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PostPosted: Tue Mar 13, 2018 11:08 am 
User avatar

Joined: Fri Mar 09, 2018 1:31 pm
Posts: 44
Hans,

It's a test on a more powerful processor, so reassure me, it's not a prerequisite?


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PostPosted: Tue Mar 13, 2018 11:57 am 

Joined: Fri Mar 29, 2013 3:04 pm
Posts: 102
I get this error as soon as sound is sent into the VST:

Image

Stereo Tool however stays running and appears to continue processing sound, except some of the scopes stop working and other quirkiness like that.


I'm guessing that's expected behavior for my CPU in Beta 40?

Image


This is going to be fixed, right? :shock:


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PostPosted: Tue Mar 13, 2018 12:43 pm 
Site Admin
User avatar

Joined: Mon Mar 17, 2008 1:40 am
Posts: 9448
Quote:
Hans,

It's a test on a more powerful processor, so reassure me, it's not a prerequisite?
No it's broken. I already fixed it, next build should run again.


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PostPosted: Tue Mar 13, 2018 4:10 pm 

Joined: Fri Mar 29, 2013 3:04 pm
Posts: 102
:twisted: :mrgreen:


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PostPosted: Thu Mar 15, 2018 12:37 pm 
Site Admin
User avatar

Joined: Mon Mar 17, 2008 1:40 am
Posts: 9448
Stereo Tool 8.55 BETA042

Windows 32 bit:
Windows stand alone: http://www.stereotool.com/download/ster ... 55-042.exe
Winamp DSP: http://www.stereotool.com/download/dsp_ ... 55-042.exe
VST: http://www.stereotool.com/download/vst_ ... 55-042.dll

Windows 64 bit:
Windows stand alone: http://www.stereotool.com/download/ster ... 55-042.exe
VST: http://www.stereotool.com/download/vst_ ... 55-042.dll


CHANGES:
- NAN seen when switching to new compressor mode which also doesn't get recovered - silence afterwards. (Peak mode recovers it though). => Not seen since, must have been something in the earliest version of it.
- Auto EQ move where_i_am back to close to min/max settings to avoid insane response times without SJP
- 4K mode line spacing bigger for presets
- Make default window size bigger for 4K
- Fixed threading issue that was introduced in Sudden Jump Protection a few beta's ago.
- Minimum window size in 4K mode


OLDER CHANGES:
- Added Basstardizer lowpass filter for output
- Make VST plugin error catching work again.
- Optimized new compressor modes, created separate code paths, put values in a lookup table. Performance vs. legacy mode: Auto EQ 5% faster, AGC same, Symmetric RMS vs RMS 7% faster (if not using Exponential Release, Spectal Balance Compensation etc), Symmetric Peak vs Peak 54% heavier (because it's now based on Symmetric RMS mode instead of Averaging mode, and all RMS modes are heavier than Averaging modes). Compared to BETA037 the performance is 13% better for the Symmetric modes.
- Fix Basstardizer crash
- Fix Basstardizer right window shape
- Fixed Digital Multiband 1 mode Flat frequency response bug introduced in 8.54.
- Fixed Symmetric Peak
- Fixed an issue in Symmetric Peak and Symmetric RMS mode with Feedback^2 enabled, for very fast attack times the Shape is higher now to avoid overreacting.
- Fixed Basstardizer: The threshold calculation was completely wrong, it worked fine on constant bass but not on dynamically changing bass.
- Basstardizer: Make Effect strength slider relative to Headroom (which turns into Harshness) - At higher Softness settings Lookahead now controls punch!
- Fixed DLL closing issue (in Audition and other programs; calling a DLL close from program close caused a hangup)
- Added mono bass fiter to reduce multipath
- Added extra protection mechanism to avoid insane release speeds. For MB, MB2, SB Compressor this can be switched on/off for testing - I will remove the checkboxes once tested.
- Relative release threshold was not calculated correctly for FB and FB^2 modes.
- Moved RECOVER_FROM_NAN outside of adjustChannel_internal_linear_attack_release_feedback_peak_peak_gate_limit to fix compiler crash.
- Bass mono fiter to reduce multipath Done, but parameter needs to be controllable separately.
- Added Symmetric Peak mode. Not at all tested yet!!
- Added Stop Threshold values for multiband compressors. They were already there for the singleband compressors, but not yet for multiband!
- Symmetric modes were visible for Digital compressor but not supported by Digital mode!
- Added "Relative release threshold" slider; removed Symmetry slider. For all dynamics processing things (so LLB, AGC, Auto EQ, compressors). Not 100% sure yet if this is a good idea for Auto EQ. See text below (*)
- Max release speed fixed
- Basstardizer: Fixed issue with difference between left and right
- Crash reported by near05 (fixed?)
- Improved external RDS insertion to allow for noisy RDS signals (some encoders (actually apparently from one specific brand) generate a pretty bad signal, which was rejected by Stereo Tool).
- Added sound card lowpass filter compensation to FM output sound card (so now beside tilt for bass there's also something for highs). NOT YET FINISHED, may cause weird behavior. It will work in many cases, but not in all. Does not work when "Ignore high frequencies" is used. Description will follow when finished.
- New compressor mode. Check all weird settings, optimize, new peak mode, remove faster attack/release, add setting for max release, fix max attack/release speed controls. Things to check: "Peak", "Peak mode", "Feedback", "Feedback^2", "Exponential release", "Max attack speed", "Max release speed". New mode is called Symmetric RMS, there's also a Symmetric Averaging but I will probably remove it because it's not useful. MORE INFO BELOW!
New AGC mode MORE INFO BELOW!
New Auto EQ and Bass EQ mode (not switchable in Bass EQ since that's new anyway). MORE INFO BELOW!
- RDS: Add PTYN
- RDS: Add timeout for TA
- Improved multipath protection
- Improved Stereo Image phase limiter
- Revisit new Hard Limit / Final Limiter with Matt & Wes - Settings removed Waiting for final feedback.
- MPEG detection is too insensitive now -> Probably fixed Waiting for feedback
- UECP UDP mode Waiting for feedback
- TA/TP via MagicRDS. Auto-enable TP if TA is used? (no)
- Added THIMEORT in ASCII RDS mode.
- Spectrum displays are broken in 4K mode
- Compressor/limiter on input before AGC to handle extreme sounds? / 2nd AGC with higher threshold for voice tracks Added, may need new mode. Waiting for feedback.
- Add auto save to Linux build Waiting for feedback
- VST delay appears to be wrong - Phase Delay and Threads
- VST version no 4K
- Backup input - fix overshoot display
- Backup input - check stereo
- Fix web server long URL issue Test release mode needed
- Scrolling through presets in 4K mode locks screen (crashes).
- Pilot-only output for 9 , works but needs to be sent back to O9SG
- Self test crashes
- Fix affinity for Linux and Mac - Mac doesn't support it.
- Edwin's bass effect - is that done now? (Maybe an extra HPF?) -> Not needed for now, based on preliminary tests...
- Put Bass EQ under license
- Do we need multiple Basstardizer bands? -> Doesn't seem like it. Not for now.
- Remove Hans mode from Bass EQ? -> Hid it (Extreme Tweaker mode, Matt mode is default, made it a pulldown instead of a boolean to clarify its behavior).
- Octaviafm extra logging? - Waiting. Once we know the cause I'll run a new build. But I'm not going to hold off releasing the current version, since 1. this issue doesn't have any side effects anymore and 2. it very likely isn't new. -> Nothing heard anymore
- Would multiple where_i_am start points improve attack? YES!!!! Think about how to implement it...
- Enabling low latency output caused crashes
- NAN recovery added to Basstardizer
- Top area of GUI made a bit higher, not all menu items fit before
- Bigger font and widgets on 4K screens
- Added Basstardizer
- Remove warnings that were shown for things that weren't even enabled.
- Fixed NAN in 8.54 in several versions in the clipper (reported by 1 person, appears to have been settings-related).
- Matt's bass effect Ready to get feedback, see "BASS EQ" before or between multibands! See note below.
- Fixed Mac multiband compressor gate error after NAN recovery.
- Add Breakaway Pipeline warning
- Add low input level warning
- Add too little AGC action warning
- Add too much noise gate warning
- Add too much BS412 action warning
- Added ASIO latency setting.
- Made streaming with libVLC easier, WARNING though, the audio quality is still the VLC streaming audio quality, there are better encoders out there. This only affects the stand alone versions.

TODO:
- New skin
- Improved Auto EQ/Bass EQ max boost calculation
- Bass EQ first band might not go down fast enough
- Check scaling issue in non-4K mode
- Check Auto EQ behavior at the start of a song => Problem was caused by Abrupt Change Protection compensation that I added recently...
- Hard limit overshoots (red blinking)
- near05 VST crash
- Make pilot generation smooth for external feeds for DARC etc.
- MB2 band coupling bug: something is wrong, check better-fg-plus.sts -> Seems ok now. Weird.
- Classical preset
- Is pre AGC affecting audio levels? (With BS412) -> Not specifically for BS412, but it slightly reduces the level even if set a lot higher. Probably needs some offset.
- Aanvraag uren
- Add AM presets
- Check MB2 1% something (see FB chat about crackling sound, which was ok in 8.00). Test with Rhodes54 preset -> Ok. But Spideys Web (7.41 vs 8.54) is different, let's test that.
- Test NanoPi

- Select instance with command line option
- Basstardizer fadeout (Edwin)?
- AM streaming output
- Multi-instance version
- WatchCat: Use "Simple Clipper" for R128 normalization if there's no license for Advanced Clipper.
- WatchCat/Generic plugin: Respond to latency request with different number for step 1 and 2
- AF method B via UECP
- "Stereo Width" in Stereo Image is broken - it causes phase problems if you're using it to go to mono with silence on the other channel. This can be made smarter!
- True Bass puchier - filter out start
- 18 Hz trigger tone
- Declipper check L-R effects
- Reduce extreme stereo
- Raspberry Pi "gedeelde bibliotheek" melding.
- Check out Butt
- Add libVLC instability warning
- Loudness meter (also for streaming)
- Omnia.9 set Stereo signal. Probably fixed? Wait for answer.
- Omnia.9 test/fix logging
- Omnia.9 AutoPilot add flag for generating noise above pilot?
- WatchCat website
- Triple stuff
- Thumb up/down in GUI for presets

- SCA2 use as backup, feed to output without processing, bypassing normal chain. Use to have FM receiver as backup, and then just feed the full signal to the output.
- uMPX 24x2ch interface
- One bass page

- GUI: Hide disabled stuff, far less confusing / much cleaner interface.
- Talk to chip
- 2 jaar
- Fardau
- -24 dB side chain range?


NOTE: Bass EQ
1. This thing should not really be needed because there's already Auto EQ. However Matt Levin insisted that it's useful, especially now that they are playing very old Christmas music, so let's try it out!
2. There are 2 modes: Matt Mode (see checkbox) or Hans mode (unchecked). In Matt mode, the highest band is not adjusted but it is used to determine the levels. So in the last stage, the highest band is in bypass mode, but the other bands respond as if it's working as well. So the bass is adjusted compared to the full spectrum. In Hans mode, the highest band is ignored completely, so if you use 2 bass bands, they are adjusted to match each other, but not the rest of the audio.


New compressor mode info:
About 3 years ago I wanted to redesign the whole compressor based on how water pressure control systems work. The whole idea was to have a compressor that moves fast when it has to, but stands still when it can. And that it would behave 'naturally' - it's something that you could actually build with real components (if you treat water pressure as audio levels).

This appeared to work pretty well. If you play a dynamic track, the compressor acted fast, and if you play an already compressed track it does nearly nothing. This is great - because it doesn't add 'restlessness' to already compressed audio, which would lead to listener fatigue.

Short summary of the rest of this text: It never worked as I envisioned! (And I never even realized that). But now it does!!

Some people have complained about the attack sometimes working too fast - which was mainly noticeable in loud 'S' sounds. The fast attack with much slower release could cause a 'gap' in the audio after the S. But I figured that that was a more or less logical consequence of the the whole act-fast-when-you-have-to idea.

Now fast-forward a bit. Last year, 2 people (Wes Keene and Matt Levin) were working on a preset together with very high compressor ratios and they noticed that in one particular track, a vocal which was originally louder than the surrounding sound actually came out softer. Well, that's not good. It sounds really annoying and broken. After looking into it I found out that my design was actually not - as I had thought - controlling the level based on RMS levels, but based on average sample levels. In most cases that's closer to RMS than peak, but it's not perfect, and as it turned out, in some cases flat out wrong.

So, I added a new mode that actually controls things based on RMS levels. And - different than many traditional compressors - it would control based on RMS levels regardless of whether it's long time or short time levels that you're looking at. Typically, a compressor would use some window over which it calculates the RMS level, and then control the audio based on that. That works great for most content, but if you play a track that for example has a very loud kick every second or so, the RMS window won't help a bit and your long-term level will probably be too low.

So I created a new RMS mode, renamed the old one to Average mode, and thought I was done. But, the problem with loud "S" sounds has gotten way worse! And it was even worse than that: Release was slower than before. So to fix that, I added some "patches": "Big release speedup" and "Big attack slowdown".

This new mode doesn't need that anymore. It's completely symmetrical, and it's still RMS-based, both on short and long time intervals! It still moves slowly when it can and fast when it has to - but not insanely fast if the attack is really big. And release isn't very slow anymore.

Since attack and release speeds are now virtually identical for RMS and Average mode, and you probably prefer RMS levels over Average levels, the new "Symmetric Average" mode is basically useless. I've put it in for now for testing, but I'll remove it afterwards.

The AGC and Auto EQ were suffering from similar issues, and I've fixed those too. There you can just disable "Legacy mode" - if I'm not wrong, the new mode should be better for any purpose than the old one.

Important: The CPU load is really high right now. I will optimize it later.

Also important: You can't just enable this new mode and expect everything to be fine without changing the settings. For small level differences there won't be a difference, but there will be for big differences. You'll definitely notice the slower attack on big level jumps.



Top
   
PostPosted: Thu Mar 15, 2018 1:00 pm 

Joined: Sat Nov 10, 2012 2:16 am
Posts: 44
Location: Australia
Hi Hans
Quote:
Stereo Tool 8.55 BETA042


Windows 10 64 Bit - PS Build 16299.309

[attachment=0]NAN-GUI.JPG[/attachment]

Error window will not go away after clicking close (it just reopens) for 4-5 times then the application becomes non responsive.

Regards

Rossco


Attachments:
NAN-GUI.JPG
NAN-GUI.JPG [ 37.29 KiB | Viewed 508 times ]
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PostPosted: Thu Mar 15, 2018 3:15 pm 
User avatar

Joined: Sat Apr 08, 2017 6:40 pm
Posts: 4
Location: Ελλάς
Quote:
Hi Hans
Quote:
Stereo Tool 8.55 BETA042


Windows 10 64 Bit - PS Build 16299.309

NAN-GUI.JPG

Error window will not go away after clicking close (it just reopens) for 4-5 times then the application becomes non responsive.

Regards

Rossco


Attachments:
screenshot 2.jpg
screenshot 2.jpg [ 9.49 KiB | Viewed 475 times ]
screenshot 1.jpg
screenshot 1.jpg [ 52.12 KiB | Viewed 475 times ]
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