Category Archives: Processing

Descriptions of unique audio processing techniques

Pro-One Dub

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Having been asked on more than one occasion, it is about time that I posted a sound from one of my favorite synthesizers, the Sequential Circuits Pro-One. This is actually two layered tracks of sounds I made with the Pro-One today in a session with Nils Westdal. The sounds are effects for a dub track at 73 beats per minute. I ran them through a couple of tempo delays and reverb to create some atmosphere. Even after using this instrument for more than ten years I still manage to get new sounds out of it. Perhaps it’s the unpredictability of the analogue oscillators and filters, or the fact that you cannot store presets, in any case it seems to breathe and even sometimes cough as if it needs to wake up a bit before behaving consistently. The short story is that this simple mono-synth from the early 1980’s has a lot of character.

Pro-One Dub

Ultraviolet Amphibian Live Segment

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This segment of Ultraviolet Amphibian was recorded during a live performance at the Nomad in Minneapolis on June 10, 2008. I’m including it as today’s sound to give you an idea how Keston and Westdal’s live performances sound compared to our studio recordings. There’s more improvisation during our live shows as well as the addition of live drums. This performance features Graham O’Brien.

Unfortunately board mixes like this one are rarely balanced because the sound is being mixed for the room. Anything loud or amplified on stage like bass guitar or drums don’t come through very well. Since the laptops, Rhodes and synth are going direct they are much louder in the board mix. I ran the recording through some pretty complex equalization and compression to try and bring out the bass guitar, but it still lacks the luster of the mastered studio version.

Tonight we are playing at the Kitty Cat Klub in Minneapolis. Tuesday, September 2nd we are performing at Peavey Plaza in downtown Minneapolis for a pro-art and political progress rally put on by TheUnConvention.com, and held during the Republican National Convention. For more information please visit our shows page on unearthedmusic.com.

Ultra Violet Amphibian Live Segment

Studio Version of Ultraviolet Amphibian

Time Expanded Radio Static

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If you had a chance to hear Johannes Kreidler’s piece, Product Placement, made up of 70,200 samples in 0:33 seconds, then you probably thought is sounded a lot like radio static. To me it sounds like parts of it were time compressed and probably up-pitched, but altogether quite an achievement. Although, you might find the style of Akufen’s piece, Deck the House, more musical.

Rather than time compress the radio static I posted yesterday, I had a go at time expanding it. Time expansion works by stretching waveforms without changing the pitch. This can have some odd results when time expanding by a significant amount. You will often hear a repetitive stuttering, or garbled effect, like what’s happening in this example. In the image you can see the garbled sections represented as rectangular patterns that occur throughout the waveform.

Time Expanded Radio Static

Illuminator Console

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To create this sound I started by programming a beat. In this case I pitched each slice of the beat individually to create a variety of pitches in the loop. Once I was satisfied with it I rendered it to a clip and applied a plugin by Paul Kellett (MDA) called Tracker, distributed by smartelectronix. Tracker tracks the frequency of a sample with a waveform, such as a sine wave, and then allows you to transpose, slide between pitches, adjust the mix and so on.

Running drums through Tracker can create some interesting and unpredictable melodies. At the start of this clip I left the mix at 100%, only hearing the melody created by the pitches tracked, then adjusted it down to zero by the end so you can hear what the beat sounds like without the pitch tracking. In front of Tracker I added Beat Repeat and turned it on a couple of times to generate some fills. I touched it up with some tempo delay mixed in here and there for some dub flavor.

Illuminator Console

Guitar Chord

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A rarely tapped resource for me are clips found in the sound file folders of Ableton Live sets I use for performances. My group Keston and Westdal use two laptops running Live synchronized using a MIDI network. We usually play instruments during our performances and use the laptops for live looping and triggering loops and “scenes” as we construct the arrangements during the show. Our drummer gets a click so we can we can leave out or bring in sound from the laptops as we like. This way we can have purely live instrumentation intermingled with sequenced and live looped audio. It’s a bit of a learning curve to perform this way, but very liberating once you get it down.

This short sample of a guitar chord was played by my good friend Jason Cameron based in Seattle. While jamming together last June, 2008 I captured a few of his phrases in one of my Live sets, and came across it today while browsing through the sound file folders, looking for something to post. I dumped it back in Live, resisted the urge to reverse it, and added distortion, delay and reverb for a little texture.

Guitar Chord