Archive for the ‘Uncategorized’ Category

Noise Sweeps

Monday, February 17th, 2014

Click here for audio

I’ve been deep in hardware development for quite a while now, so the blog and my responsiveness to e-mails have suffered. The good news is that something new is almost ready to show. This audio clip comes from a POKEY engine running inside an FPGA. The sweeping is the sound of modulating the POKEY clock across several octaves. I’m also varying the pitch in the registers of the POKEY engine, which is what causes the sudden changes in timbre.

 

What does your soul look like?

Monday, July 30th, 2012

…because this is what a set of roughly 300 Nintendo NES CPUs looks like

Glory

It might be easier to think of in terms of square feet. In that case the number is four.

Hax0rr3d, apparently

Sunday, April 1st, 2012

Someone is in my base, injecting all my SQL.

This site was hacked at some point in the last couple weeks. I was alerted this morning when I tried to moderate spam comments. My browser pleaded that I turn back, for the site had become a wretched hive of scum and villainy. I am disabling blog comments to be safe so that there is no future risk of malicious code getting in through a comment.

HostGator was great about cleaning up the malware on the site.

If you have visited any part of skrasoft.com in the past couple weeks, please do a malware scan on your computer. I have no idea what the site was trying to install. I recommend Malwarebytes for scanning, but I may not give the best advice since I also get hacked.

2A03 Horizons

Thursday, August 27th, 2009

I made an Octave script to simulate and graph all the 2A03 sweep unit settings as they change pitch over time. It is based entirely on my understanding of some documentation I found online… no measurements have actually been done. Each staircase represents one iterated combination of bit shifting and clock dividing. Something about the various quantizations weaving in and out of each other is strangely hypnotic.

Sweeeeeeeep

Sweeeeeeeep

Droppin Logs

Droppin' Logs

Open them in a new window for the full glory.

Chugging Away

Sunday, January 4th, 2009

Audio Clip 1

It’s just another clip from the mystery project. This time with portamento and adjustable vibrato depth.

Side Effects

Thursday, January 1st, 2009

Audio File 1

What does it mean???

What does it mean???

I’m still waiting on some parts to get back on track with the Pokey synth module, so I’ve been tweaking the mystery project more. The audio clip above is just a 4-note sequence. Each note generates its own pseudo-random rhythmic pattern.

Those Wonderful Toys

Wednesday, December 24th, 2008

Here are a couple short clips from playing around today. They’re from a top secret mystery project being played live. No effects have been added.

Clip One

Clip Two

An Introduction

Tuesday, July 15th, 2008

I am always working on audio projects and am constantly amazed by the creativity I run into on the internet daily. Through this blog I hope to consolidate progress for the projects I am designing, in addition to showing other people’s work that inspires me.

I have three large projects going right now:

The first is a synthesizer module using an old Atari Pokey chip at the sound generator. It is made to take old digital audio technology and give it real-time analog control.

The second follows in the same vein, but uses a 2A03. It was the CPU used by the Nintendo Entertainment System and several old arcades. It is not a sound chip like the Pokey, but contains sound-generating hardware.

The third is entirely different. It is a program for DJ’s and turntablists to record/edit/manipulate scratches. Many programs already exist that allow digital media to be controlled via turntable, but I have not seen any that allows the actual hand motions of a DJ to be recorded and reproduced. My program allows recording and editing of both crossfader and vinyl movement.

Soon each project will have its own dedicated page, but I will try to keep track of minute progress here.