LCD Equalizer Display

[skate15e]

I am trying to add the ability to display a 16 channel equalizer to my LCD plugin. Is there a way to get this data when an audio file is playing in GBPVR? If not, any idea on the basic implementation? I have an API for the LCD that takes a 16 place integer array with the values ranging from 0 - 100. I am just not sure how to get this data to correspond to the audio file that's playing.

Thanks in advance for the help.

[sub]

Playback is done by third party directshow components, so the raw audio data doesnt flow through any of my components - ie, GB-PVR doesnt have the data required to supply this.

Most likely to implement this sort of thing you'd need to create a new directshow filter that sits in front of the audio renderer device, and parses the data as it passes to detect the frequencies used in each sample.

[skate15e]

OK, thanks. I am not sure that will be worth the effort.

[htrednek]

I have been looking into this too. From what I can see, iMon has their software configured as an option to simply monitor the Speaker out, so would a new directshow filter really be required?

I have posted this question on Soundgraph's forum here. We'll see what they say too.

[sub]

I dont know. You couldnt get this info from GB-PVR itself, but you might be able to get it somehow from the sound device.

[drlava]

Winap has many plugins like this, if you can get it to monitor the sound device it might be a fairly simple solution.

[stustunz]

lcd smartie plugin does it with winamp plugin but not sure if its open source if that helps

[skate15e]

Thanks for the info, I will continue to look into it and see what Soundgraph says on their forum. I would certainly be a nice addition.

[htrednek]

Boy I'm disappointed in Soundgraph's response time. If we took this long to respond around here we'd likely be lynched.... I hope they answer soon.

[htrednek]

Soundgraph finally responded...

Sorry, even though the source code is not that complex, we cannot open the code.
Instead EQ data can be obtained this way.
a. Capture PCM data of Wave-Out
b. Apply FFT for the captured PCM data
If you search the internet, you can easily find both method.

Frankly what they responded with is waaaaaaay over my abilities. I am still searching and will let you know if I find anything else on the subject.