Audio Cookbook

Monophonic Step Sequencer Max for Live Device

I have converted a Max patch I build into a Max for Live device as an exercise for learning M4L. The original patch is a monophonic step sequencer that I wrote about in Step Sequencer Built in MaxMSP. I ran into some difficulties converting the patch along the way. Although it worked perfectly in Live, for some reason it was causing Live to crash after saving. It was also not storing the values in the Live number boxes, drop-downs, and sliders. The problem went away when I went through the tedious process of recreating the patch rather than copying and pasting my original work. This is a little worrisome since the next conversion will not be so simple (Multitouch Rotary Dial and X-Y Granular Exploration). Here’s an audio example with a little reverb to give you an idea of what it does.

M4L StepSequencer

André Michelle at Flashbelt 2010

Yesterday I had the distinct pleasure of introducing André Michelle at the Flashbelt conference in Minneapolis. André is the lead developer of Audiotool. If you’re not familiar with Audiotool it is, in my view, the best web based audio production application I have ever seen. The bulk of André’s presentation involved showing Flash built demos of advanced audio functionality, like granular synthesis, guitar modeling, and using physical modeling to influence sounds and sequences.

Toward the end of his presentation he brought Audiotool into the mix. Audiotool is an application built in Flash. The nearest thing I could compare it to is Reason. The biggest difference is that it runs on the web. This allows for social media opportunities that wouldn’t otherwise be possible. Instruments built into Audiotool, include very convincing emulation of several popular Roland devices, like the TR-808 and the TB-303. It also includes a modular synth called Pulverisatuer and a number of effect processors.

Finally, there is an audio track module that allows you to bring in samples stored within a pretty big library provided by Loopmasters. You can’t bring in your own samples yet, but André assured us it was in the works.

André played me a few examples of some of his favorite user generated tracks from Audiotool and I was very impressed with the sound quality and scope. It’s easy to dismiss a web based audio application as a novelty, but the community around it is creating some totally professional sounding stuff that can’t be ignored.

Book Ideas for a Sound Design Class?

I am excited to have the opportunity to teach an upper level sound design class to digital film students this Fall. I have several books in my collection that relate to sound design that cover very specific topics, but what I’ll need for the class is a book that covers a broad spectrum of concepts within the field. The course competencies include multi-tracking, mixing, sampling techniques, signal processing, equalization, editing, synchronization of audio and video, Foley, and ADR. Does anyone have any suggestions for a book focused on sound design, but general enough to cover all of these topics?

To give you an idea of what I’m looking for, I currently use Real World Digital Audio by Peter Kirn for an entry level audio production class that is a prerequisite for the sound design class. Peter’s book works really well because it’s current and covers exactly what I wanted for the audio production class in an illustrated, thorough, yet clear and concise way.

Experimental Music Mondays: Ephemeral Structures

This Monday, April 26, 2010 is the third installment of Experimental Music Mondays at the Kitty Cat Klub in Minneapolis, Minnesota. The line-up includes violin soloist Kip Jones, Ephemeral Structures, and Primidonahue (Michael Donahue). The music will start at around 9:00pm and there’s no cover to get into the club.

Yesterday afternoon I had a fantastic session with Ephemeral Structures. Although we have all worked with each other in several capacities, this is only the second time the group has performed in eight years. The result of yesterday’s session were pretty inspiring, so we are considering producing an album. The project includes Kyle Herskovitz (also know as DJ Zenrock) on turntables, Nils Westdal on bass and electronics, and me on electronics. The photo shows Kyle playing his turntable with a rubber band. I’ll share a segment of what we captured in a upcoming entry.

GMS Now Available for Windows

GMS v0.10 beta binary distribution for Windows is now available, thanks to Grant Muller, who compiled the latest source code for the GMS under Windows. Please visit the GMS page to download the Windows version. If you’re interested in the source code for the GMS you can find it at http://code.google.com/p/gestural-music-sequencer/.

Excerpt of New Music

I’ve been working on some music composition and production for my upcoming album so I’ve not been doing as much experimenting with processing and sound design for the last few days. It’s mostly roughs at this stage, but here’s an excerpt from a new work.

This chunk of music happens to be the context for the arpeggio from the previous post and also contains a variation of the audio from Three Phase Oscillator.

Excerpt of Music from Title TBD

MIDI Arpeggiation in Ableton Live

I recenty had the opportunity to take a good long look at Ableton Live’s Arpeggiator MIDI effect. I have used it here and there in the past, but recently discovered how flexible it is. There are many more algorithms (labeled as styles) than I have seen on other arpeggiators (a total of eighteen styles) for a broad variety of patterns. This example uses the “Thumb UpDown” style. Imagine playing a sequence of notes on your right hand starting with your thumb, then index finger, back to thumb, then middle, etc. and that’s kind of what this particular style does to the notes fed into it. Other capabilities of the arpeggiator include a velocity ramp to manipulate the dynamics of the patterns, and typical parameters like retriggering, gate, and groove.

Solar Arpeggio

Filtered Synth Drums at 125bpm

I programmed this beat and ran it through some pretty thick filtering followed by compression with a touch of delay automated in here and there for a few dub effects. Another technique I used to get some different fills going in the pattern was to add a MIDI arpeggiator and turn it on at certain moments to change the feel. The arpeggiator was programmed to randomize the notes in the sequence using specific note durations. I alternated between eighth notes and thirty-second notes.

Arpeggiating at eighth notes slowed down the feel of the beat since the high hat pattern was programmed in sixteenths, while arpeggiating the pattern to thirty-seconds created some simulated fancy fill work. These techniques can be hit or miss, so whenever I use them to produce I generally render the track several times with the random behaviors enabled then scour the output for “gems”. Finally I collect the “gems” and use them as fills selectively. Another example of unnatural selection at work.

Filtered Synth Drums at 125bpm

Korg MS2000 Tempo Delay Effects

I created this synthesized effect using a Korg MS200 Analog Modeling Synthesizer. I often use this instrument with the external sync enabled for arpeggiation and and tempo delay processing. The delay does some strange things with the external sync enabled. As you adjust the delay time it jumps from different units of time within the tempo including triplets. This can produced some future dub, spaced out, synthethized effects when the feedback is up all the way.

Korg MS2000 Tempo Delay Effect

Analog Arpeggiation

Old monophonic synthesizers have had all sorts of ways to sequence notes; from fairly complex programmable sequencers to simple arpeggiation. Arpeggiators are nice because they sequence the notes that are played on the keyboard in realtime, allowing the performer to improvise while taking advantage of the capabilities of the machine at the same time. Based on the speed of the LFO, the arpeggiator on the Sequential Circuits Pro-One will sequence all the notes in a chord in either ascending order, descending order, or both. Other synths offer a feature to play the notes in a random sequence. In this example the notes are played in ascending order. I cranked up the LFO and added some delay so that the notes blend into each other so you can hear the harmony in the sequence. With this technique you can sort of simulate polyphony on a mono-synth.

Analog Arpeggiation