I need an audio equalizer for my zPlayer

[CYCho]

The lack of a decent audio equalizer is the feature I miss most in my zPlayer. A one-file, no-install, no-dependency media player written only with Windows components and standard AutoIt #include files is the principle I'd like to stick to. Please give me some direction on how to implement a decent equalizer in my zPlayer. If it is not possible without compromising my principle, I would like to know that as well. Thanks in advance.

[MattyD]

From what I can dig up, its looking a bit grim hey...

The WinMM mixer stuff looked like a possibility, but the only controls I could find on my VMs post win98 were volume and mute buttons.

I did see this for WMP as part of the skinning API? not sure how helpful that is...
https://learn.microsoft.com/en-us/previous-versions/windows/desktop/wmp/equalizersettings-element

Then theres audiograph, which seems to incorperate an EQ object - but its WinRT again, so that could be a bit ambitious. I'll see what I can do with it during the week.
https://learn.microsoft.com/en-us/uwp/api/windows.media.audio.audiograph?view=winrt-26100

[CYCho]

19 minutes ago, MattyD said:

I'll see what I can do with it during the week.

It is so nice of you, @MattyD. Thanks a lot. I will look forward to your success. But regardless of the outcome, you deserve my thanks and respect.

Edited March 22 by CYCho

[MattyD]

No problems CYCho, thanks for the ego boost

I'm not sure if we can do Video at this point with AudioGraph.  You may be able to tie to a mediaelement object that supports video - but rendering the picture requires working out XAML islands, and that is where I got stuck last time.  It might also be possible to feed the input from an external source via frames, so that probably warrants investigation too. 

Another interesting point - the EQ looks to be related to a non-winRT XAudio2 object. So I reckon this is definitely worth looking at.  The EQ looks to be an APO too, which could be relevant as @PeterVerbeek has already done a ton of work in that space!

Just ask if anything is unclear with how to approach the WinRT stuff too - I realize parts are probably a bit opaque!
I've included the calltips installer to help out - I recommend installing those while having a play around. Also, I'd recommend downloading and compiling the Class Explorer. That one helps decipher what exactly is expected/produced by different objects, and what interfaces are attached etc.

EQDemo.zip

[CYCho]

Thanks for your time. I tested your EQDemo.au3 with a 3-minite mp3 file and I could definitley feel the difference between the 2 modes. You are great!

WinRT looks like the way to go for the future. After you come up with an example for video playback, I will have to think hard whether I should give up the one-file, no-dependency rule, at least for the source code.

Edited March 24 by CYCho

[CYCho]

@MattyD, if the minimum, maximum and default bandwidths are defined as 0.1, 2.0 and 1.0 respectively, your assumption that they refer to octaves seems correct. If so, IEqualizerBand_SetBandwidth($apBands[0], 2) seems to be a correct expression, where 2 is the number of octaves. Am I right?

Edited March 25 by CYCho

[MattyD]

yep, should be. 👍

[CYCho]

How can I add this EQ effect as an attribute to "Windows.Media.Playback.MediaPlayer" discussed in this post?

Edited March 25 by CYCho

[MattyD]

I'm not sure we can unfortunately

Looks like I was wrong about audiograph being able to attach directly to player object. I had my classes mixed up.. Audiograph will take a mediasource object as an input, which is very different from a mediaelement.

with MediaPlayer, its possible to load audio effects via the IMediaPlayerEffects interface - but it looks like you might have to build them from scratch as well! https://learn.microsoft.com/en-us/answers/questions/1280085/how-can-i-add-equalizer-effect-to-the-mediaplayer The doco is a bit light there though, so that requires a bit more digging to confirm.

I'm still planning to check out some of the other stuff too. just might need a few more days.