Vdmx audio input
The white line above the volume bar indicates the beat threshold. Beat Detection – the volume bar flashes white when a beat is detected.Levels – the bar chart of frequency amplitudes, from bass on the left to treble on the right.
![vdmx audio input vdmx audio input](https://1024d.files.wordpress.com/2011/06/vdmx_tut_03.jpg)
![vdmx audio input vdmx audio input](https://andyland.info/wordpress/wp-content/uploads/1030210-1024x576.jpg)
To sync to an audio input, we need to analyse the audio stream in realtime. The demos below work in Chrome using Three.js and the Web Audio API, but the same principals apply if you are using Processing, OpenFrameworks or some other framework.
Vdmx audio input free#
This can be useful for “Hands Free VJing”, allowing you to sit back and have the visuals automatically sync, or in a video game where you want some part of the visuals to react to the soundtrack. Here I want to talk about the last method.
Vdmx audio input manual#
Vdmx audio input code#
I also have a version of this setup for running Kyle McDonald/Arturo Castro’s Face Substitution code with VDMX input and output. There are also occasional frame drops between OF and VDMX because I’m not doing frame syncing between the apps, so occasionally it tries to process a frame that isn’t there. No need to process 1280 x 720 to get contours if you don’t need the accuracy. Granted the resolution is fairly low sending between the two apps, but if you are just doing analysis for low rez details, sometimes 320×240 may be all you need. This setup will run at roughly 60fps on a 2010 Macbook Pro.
![vdmx audio input vdmx audio input](https://destroythingsbeautiful.files.wordpress.com/2012/08/screen-shot-2012-08-18-at-23-39-471.png)
Here is a demo of this whole setup running in a feedback loop from VDMX->Syphon->OF->OpenCV->Syphon->VDMX:
![vdmx audio input vdmx audio input](https://images.squarespace-cdn.com/content/v1/50169cf884ae68067baa7365/1348193919035-XTKB5BXQQ4LSUTFO8NUV/Screen+Shot+2012-09-20+at+10.18.18+PM.png)
Capture the VDMX Syphon feed in OpenFrameworks as a Texture (actually an IO Surface under the hood.not quite a texture).On Github, I have sample code and VDMX project for you that helps to walk through the individual components of: Put a pulsing red rectangle around parts of the image that are moving). You can also use it for interesting graphical effects that are harder to achieve with traditional shaders and filters (e.g. Image analysis can be a useful tool for performance because you can either use the info in the images to process itself (e.g. Image analysis can potentially be much slower than audio analysis, but the algorithms are getting fast enough now that it becomes a viable option for incorporating into live setups. This will walk you through the important connections you will need to make to get VDMX and an OpenFrameworks application talking via Syphon for the purposes of performing computer vision/OpenCV operations on your live visuals.Ĭurrently most commercial visual performance softwares do not include methods of actually analyzing the imagery of what you’re playing with, they tend to focus on working on sound analysis. This will work for any Syphon enabled application, but I’m going to stick with VDMX for simplicity. This will assume you have a little bit of experience with OpenFrameworks and XCode, but let me know if you need more info in the comments. A slightly different version of this post will eventually get posted to the fantastic VDMX blog, but here I will focus a little more about getting things up and running in OpenFrameworks.