A while ago, I gave a talk on The Audio Programmer meetup on how I built a spatial audio plugin which you can watch below:
The plugin (called Orbiter) is open source and can be found in Github. A pdf of the slides from the talk is available here:
The video covers the development process in more detail but some of the concepts in the talk are covered briefly in this post.
(more…)Reverb (reverberation) is a super interesting topic. While the basic physical principle is easy to understand, implementing reverb in digital form is the subject of much ongoing research and development.
In this post, we will be making use of the comb filters that we learned about in previous posts and apply them to create an early type of reverberator, the Schroeder Reverberator.
The first couple of posts went through setting up the hardware and the development environment. In this post, we’re going to make use of what we’ve learned so far and create a simple audio pass-through unit.
The last post went into the hardware details for our audio project. In this post, we’re going to cover the coding environment. Aside from the basics, there are some neat features in the microcontroller that we definitely want to use and that’s going to need some extra configuration.
The extra configuration steps sent me on a bit of a wild goose chase throughout the internet so I hope that by compiling most of what I learned into one post, you can get started more quickly.
Here’s what we’re going to cover:
There are a lot of musically savvy engineers who, after their first signal processing course, use their newfound knowledge to build an effects pedal of sorts. I definitely put myself in this category.
Over the next while, I will be messing around with different audio processing methods like filtering, reverberation, wavetables and whatever I feel like playing around with.
For this post, I am going to go through the hardware setup. The firmware setup will be covered in the next post.
The analog front end schematic and a physical implementation example is provided below.
TiCS = “This is Cool Stuff”
I thought I’d try something new where I would showcase some neat stuff I’ve found around the internetz once a month.
1. A Cool Way of Visualizing the FFT
Ben McChesney took the openFrameworks addon, ofxFFT and made a neat way of visualizing the Fast Fourier Transform of whatever his mic was picking up…in this case, his voice and music.
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Hi everyone,
Things are getting really hectic around here at meoWS. I am currently wrapping up a project and am about to start up two new projects. I hope to get one of them finished this month. Be sure to check back later this week in the projects section to see what I’ve cooked up recently.
Damnit partybot, we’re supposed to be working!!
About a month ago, I used the pic18F and the SF Music Instrument Shield to play some songs from Ocarina of Time. A friend requested Saria’s song quickly after I had posted. I accepted the challenge.
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Every now and then, I like to play around in the Signal Processing world – more so in the audio realm than anything else. The thought that sound can be represented by an array containing a whole bunch of (seemingly arbitrary) numbers ready for manipulation is just awesome!. Yes, I had a lot of fun in my signal processing labs at school and I still love messing around with GNU Octave post-college.
Waveform of the Track I Used.
A friend of mine asked me if I could make a microcontroller play songs from Legend of Zelda – Ocarina of Time. I said yep! With the power of the VS1053b in the Sparkfun Music Instrument Shield and the MIDI library I had cooked up earlier, I was sure I would be able to do this one quickly…
Everything looks better with instagram!
