Matching Equalizer

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tramp
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Matching Equalizer

Postby tramp » Wed Jul 10, 2019 5:18 pm

I've written a matching EQ LV2 plugin.

It's purpose is to analyze two sources and create then a EQ curve to
apply the EQ characteristics from the first source to the second one.

Image

Useage

GxMatchEQ is a profiling EQ.

You could analyze the spectral profile of a sound source by press 'Match1'. Press 'Match1' again when done.

Now you could (optional) save the profile by press 'Profile' and select 'save', enter a name for it in up popping text input field and press 'ok'. This way you could later reuse it to compare it with other sound sources.

After that (or after loading a profile from the menu), you could profiling the second sound source, the one you want to match the spectrum of the first source by press 'Match2'. Press 'Match2' again when done. GxMatchEQ will calculate and apply the needed EQ settings to match the spectrum of the first profile. Those EQ settings you could save as preset (host side).

That's it. You could save/load/delete up to 15 profiles and unlimited presets. Surely you could set the EQ settings by hand (mouse or keyboard) at any time, to match the result even more to your taste.

To clear the EQ settings, press 'Clear'. That will clear the EQ parameters, but keep the loaded profile in use.

If a profile is loaded, you could see it as little blue bar's in the EQ screen, and the profile name is displayed above.


https://github.com/brummer10/GxMatchEQ.lv2
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merlyn
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Re: Matching Equalizer

Postby merlyn » Wed Jul 10, 2019 7:28 pm

Hey tramp!

Good to see you back!

This looks great and, as far as I know, something that has been missing from Linux plugins.

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milo
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Re: Matching Equalizer

Postby milo » Wed Jul 10, 2019 8:15 pm

What's the use case for this? Would you put in on the master bus during the mastering process and match it to a track you are trying to emulate the sound of?

Maybe you could use it as a sort of automated noise filter?

What else? I'm intrigued with the possibilities.

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CrocoDuck
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Re: Matching Equalizer

Postby CrocoDuck » Wed Jul 10, 2019 8:41 pm

Great stuff! I kinda wanted to do a similar thing. Maybe in the near future.
Check my Linux audio experiments on my SoundCloud.
Browse my AUR packages.
Fancying a swim in the pond?

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sysrqer
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Re: Matching Equalizer

Postby sysrqer » Wed Jul 10, 2019 8:53 pm

This is amazing, a really big step for linux. Thank you and great work (perhaps my moaning didn't fall on deaf ears? 8) )

As a feature request it would be great to have a wet/dry so you can dial in a percentage of the effect.

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sysrqer
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Re: Matching Equalizer

Postby sysrqer » Wed Jul 10, 2019 9:04 pm

milo wrote:What's the use case for this? Would you put in on the master bus during the mastering process and match it to a track you are trying to emulate the sound of?.


That is one major use case, yes. You can use that over your mix or use it as a guide for what might be missing or wrong with your mix.

milo wrote:Maybe you could use it as a sort of automated noise filter?

I guess so? Try it.

milo wrote:What else? I'm intrigued with the possibilities.

I'm sure there are a lot of possibilities for abuse, find a gramophone recording and sample the eq and put that over an intro, or a drum bus? Change the wet/dry (feature request) over the period of a verse or chorus to gradually modulate the eq morph? Combine with an automated reverb send slope? How about sampling the eq from the reverb...?

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funkmuscle
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Re: Matching Equalizer

Postby funkmuscle » Thu Jul 11, 2019 11:52 am

Daaaaaaaaaamn!!!!!! This is freakin' awesome!! Just took it for a test ride!!! It's amazing dude!!! You've outdone yourself again!! :D

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funkmuscle
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Re: Matching Equalizer

Postby funkmuscle » Thu Jul 11, 2019 3:31 pm

One thing I've noticed though it's very taxing on the CPU. I'm getting a lot of popping and when I look at the DSP it jumps from 45% up to about 80 to 90%. This is Mixbus 32C.

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sadko4u
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Re: Matching Equalizer

Postby sadko4u » Thu Jul 11, 2019 4:12 pm

funkmuscle wrote:One thing I've noticed though it's very taxing on the CPU. I'm getting a lot of popping and when I look at the DSP it jumps from 45% up to about 80 to 90%. This is Mixbus 32C.


Because it looks like applying set of recursive filters:
https://github.com/brummer10/GxMatchEQ. ... eq.cc#L768
This math is pretty computation-intensive.

Also there can be two problems that can dramatically change the performance: DAZ and FTZ flags for x86 archtecture.
Floating-point for x86 unit is badly performing with denormal floating-point values, so they can do a serious computation bottleneck and should be replaced with zeros instead. Setting special bits DAZ and FTZ of the FPCSR register before evaluating run_dsp_() method can help a lot.
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tramp
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Re: Matching Equalizer

Postby tramp » Thu Jul 11, 2019 4:48 pm

funkmuscle wrote:One thing I've noticed though it's very taxing on the CPU. I'm getting a lot of popping and when I look at the DSP it jumps from 45% up to about 80 to 90%. This is Mixbus 32C.


What CPU do you use?

Here, on
CPU:
Topology: Quad Core model: Intel Core i5-7400 bits: 64 type: MCP
arch: Kaby Lake rev: 9 L2 cache: 6144 KiB
flags: lm nx pae sse sse2 sse3 sse4_1 sse4_2 ssse3 vmx bogomips: 24000
Speed: 3300 MHz min/max: 800/3001 MHz Core speeds (MHz): 1: 3300 2: 3300
3: 3300 4: 3300


GxMatchEQ use 1,5% DSP load as much on 128/2 frames/periode.
This is with Mixbus-4.3.19

EDIT:// However, you may want to do a new checkout, I've now added, a suggested by @ sadko4u the set FZ (Flush to Zero) and DAZ (Denormals Are Zero) flags. Hope that helps.
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funkmuscle
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Re: Matching Equalizer

Postby funkmuscle » Thu Jul 11, 2019 6:39 pm

updated to the latest git and same issue:

Code: Select all

processor       : 0
vendor_id       : AuthenticAMD
cpu family      : 21
model           : 1
model name      : AMD FX(tm)-4100 Quad-Core Processor
stepping        : 2
microcode       : 0x600063e
cpu MHz         : 3631.305
cache size      : 2048 KB
physical id     : 0
siblings        : 4
core id         : 0
cpu cores       : 2
apicid          : 0
initial apicid  : 0
fpu             : yes
fpu_exception   : yes
cpuid level     : 13
wp              : yes


or

Code: Select all

Architecture:                    x86_64
CPU op-mode(s):                  32-bit, 64-bit
Byte Order:                      Little Endian
Address sizes:                   48 bits physical, 48 bits virtual
CPU(s):                          4
On-line CPU(s) list:             0-3
Thread(s) per core:              2
Core(s) per socket:              2
Socket(s):                       1
NUMA node(s):                    1
Vendor ID:                       AuthenticAMD
CPU family:                      21
Model:                           1
Model name:                      AMD FX(tm)-4100 Quad-Core Processor
Stepping:                        2
Frequency boost:                 enabled
CPU MHz:                         2720.868
CPU max MHz:                     3600.0000
CPU min MHz:                     1400.0000
BogoMIPS:                        7234.42
Virtualization:                  AMD-V
L1d cache:                       32 KiB
L1i cache:                       128 KiB
L2 cache:                        4 MiB
L3 cache:                        8 MiB
NUMA node0 CPU(s):               0-3
Vulnerability L1tf:              Not affected
Vulnerability Mds:               Not affected
Vulnerability Meltdown:          Not affected
Vulnerability Spec store bypass: Mitigation; Speculative Store Bypass disabled v
                                 ia prctl and seccomp
Vulnerability Spectre v1:        Mitigation; __user pointer sanitization
Vulnerability Spectre v2:        Mitigation; Full AMD retpoline, STIBP disabled,
                                  RSB filling
Flags:                           fpu vme de pse tsc msr pae mce cx8 apic sep mtr
                                 r pge mca cmov pat pse36 clflush mmx fxsr sse s
                                 se2 ht syscall nx mmxext fxsr_opt pdpe1gb rdtsc
                                 p lm constant_tsc rep_good nopl nonstop_tsc cpu
                                 id extd_apicid aperfmperf pni pclmulqdq monitor
                                  ssse3 cx16 sse4_1 sse4_2 popcnt aes xsave avx
                                 lahf_lm cmp_legacy svm extapic cr8_legacy abm s
                                 se4a misalignsse 3dnowprefetch osvw ibs xop ski
                                 nit wdt lwp fma4 nodeid_msr topoext perfctr_cor
                                 e perfctr_nb cpb hw_pstate ssbd vmmcall arat np
                                 t lbrv svm_lock nrip_save tsc_scale vmcb_clean
                                 flushbyasid decodeassists pausefilter pfthresho
                                 ld

ufug
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Re: Matching Equalizer

Postby ufug » Thu Jul 11, 2019 7:00 pm

Looking forward to seeing what I can do with this one!

A potentially cool feature would be a "reverse" button which would create an opposite profile. It might be a useful starting point for giving space in the mix to two similar sounds. I do that manually with EQ a lot if I am doubling guitar parts. Just a thought.

Glad you are back at it, tramp. I was just wondering what you were up to the other day when gxSVT saved the day for me on a weak bass track...

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funkmuscle
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Re: Matching Equalizer

Postby funkmuscle » Thu Jul 11, 2019 7:43 pm

It's awesome! As a test, I was using Smells Like Teen Spirit as a reference track for a mix.
I placed MatchEQ in the Master Bus, grabbed the profile(1) then the profile(2) to my song. This made my mix more pro sounding. I just need to overcome the DSP maxing out issue.

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sadko4u
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Re: Matching Equalizer

Postby sadko4u » Thu Jul 11, 2019 9:22 pm

tramp wrote:EDIT:// However, you may want to do a new checkout, I've now added, a suggested by @ sadko4u the set FZ (Flush to Zero) and DAZ (Denormals Are Zero) flags. Hope that helps.


You've done it not in right way. FPCSR is thread-local register and will be reset if your code will be executed in another thread. Moreover, Ardour also changes the value of the FPCSR register, so there is no guarantee that you'll get right FPCSR state in the void Gx_matcheq_::run method.

Please consider how in LSP I've implemented set/restore DAZ and FTZ flags:
https://github.com/sadko4u/lsp-plugins/ ... #L113-L115
https://github.com/sadko4u/lsp-plugins/ ... pp#L86-L98
https://github.com/sadko4u/lsp-plugins/ ... .h#L17-L26
https://github.com/sadko4u/lsp-plugins/ ... xcsr.h#L74
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tramp
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Re: Matching Equalizer

Postby tramp » Fri Jul 12, 2019 4:53 am

sadko4u wrote:Please consider how in LSP I've implemented set/restore DAZ and FTZ flags:


Thanks, well we could try that, but, to be honest, even when I build GxMatchEQ without enabling the sse register, so without any Denormal protection, the max dsp load here is 1,5%. No spices, no issues at all.

@funkmuscle
Have you tried GxMatchEQ in a other host, say jalv or carla? Do you've the same issue there?
Have you as well issues when you didn't use a profile, so that GxMatchEQ only sit on the masterbus without alter the sound?
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