Archive for the ‘tools’ Category

uLFO

Wednesday, March 3rd, 2010

Got a couple of new modules this week. The MFB Dual ADSR will replace the Doepfer A140. It’s got two ADSR envelopes, each with a “hold” state as well as the expected attack, decay, sustain and release. The envelopes can be triggered individually or together, and they each have two outputs. This is all great.
The Bubblesound uLFO is at its heart, as its name suggests, a low frequency oscillator. But it’s more than just that. It can go really really slow — something like 20 minutes per cycle — and it can be tracked at 1v per octave at audio rate, which basically makes it a secondary VCO. I’ve been wanting to learn more about FM synthesis and this is my first module that has a linear FM input. Both of my VCOs, Doepfer A110’s, only have exponential FM (at some soon point I plan to replace the 110s with a Cwejman VCO6 and a Harvestman Hertz Donut but they’re hard to come by right now).

uLFO and MFB dual ADSR

One funny thing about the uLFO. On Monday I noticed that the response of the SIne Shaped output seemed odd. This is a unique feature of the uLFO. It’s got a regular sine output but it’s also got a “shaped” sine, which basically creates what the Bubblesound website calls positive/negative biased non-linear triangles. The wave forms look like waves as drawn by a kid on one side, and bumps or the McDonalds logo on the other. However, I noticed that the shapes it created were the opposite from the icons indicated on the panel of the uLFO. I made a little movie to send to send to Bubblesound to make sure that I was hearing it right.

I posted this to the Muffwiggler forum, which got mixed replies. To make sure I wasn’t going nutty I ran the waves through my CueMix oscilloscope which proved that yes, I was hearing it correctly. Later, David at Bubblesound wrote and confirmed my observation. Regardless of this little quirk, this is a terrific module and I look forward to posting more here from the uLFO.

Popularity: 6% [?]

i got a sequencer

Wednesday, February 17th, 2010

I have sequencers running out my ears on my computer. I regularly use Numerology, Reaktor, Ableton and Volta to sequence soft synths and, lately, my modular via midi. However, a good part of the reason I’ve become sort of kind of obsessed with this modular business is the tactile control of buttons, switches and knobs.
To that end, I added a sequencer in the form of the MFB Seq02 last week. This thing is incredibly versatile for such a small thing. It can run twelve separate CV sequences of up to 32 steps each, or six CV and six trigger/gates. It’s got its own clock and it can be controlled by an outside clock as well.

I’ve not had much time this week to work with this thing, but today I set up a simple four note repeating sequence and just started patching. These are variations using pretty much the same four note patterns. Each track on the Seq02 can have one of either an A or B 8-step sequence, or both in a row. A three-way switch chooses which mode. So I just made two different four-note sequences, started the sequencer, and switched back and forth.

The sounds are coming from the A110 VCOs in various waveforms, and filtered at different times with the Model 12, the A120 VCF, and the A101-2 Low Pass Gate. The A101-2 is the thing that creates the plucky acoustic sounds. When you hear it you’ll know. I used MOTU’s Volta to send various trigger and step-sequences to both the Seq02 as a clock, and other modules for various modulations. I sometimes wanted various numbers of steps, where the Seq02 only allows one to choose steps on a global level. Meaning if I want one sequence of triggers to be four steps and another to be seven, I have to rely on the software.
The delay was added in Ableton because it sounds nice.

sequencing with a sequencer by dance robot dance

a little sequencing?

Popularity: 39% [?]

songs for the building of puzzles

Tuesday, January 26th, 2010

When I make these little animated movies, I typically believe that I’ll able to simply dig into my huge folder of songs-in-the-works and various four-bar clips I’ve recorded and find something that will fit. And often that’s the case. However sometimes it’s not and i have to start something from scratch.

On Friday I recorded a little time lapse of my building a puzzle. This puzzle is one I illustrated for Mudpuppy last year. I like to put these things up on MrBiggs.com. I spent an hour or so first going through Ableton clips and song files, then through some of the stuff I’ve played around with in Numerology. Nothing really piqued my interest so I tried recording some sequenced loops using the analog modular I’ve been putting together. This should have been enough, but it just wasn’t coming together. I found myself getting wrapped up in the knob turning and sound making and not in the song making like I should have been. I couldn’t get the sound to even work until I realized that I had some settings wrong in Volta/Ableton. I was feeling rushed as the day was slipping away so I knew it was a doomed effort. After taking some time off and drawing (you know, my actual job) I fell back on what I know works. I opened up Numerology, dropped in a matrix sequencer Reaktor’s Oki Computer synth, which I know will give me some funny bleepy sounds with lots of modulation possibilities, perfect for this little movie.

Oki Computer, Reaktor

Oki Computer, Reaktor

Oki is an interesting little instrument in that it’s basically a wavetable synth and specializes in digital sounds and odd noises. I had Reaktor for a good two years before I started wrapping my head around this synthesizer, but now I can make it do what I want, more or less, and I have quite a few of my own presets that I use as starting points. Along with the matrix sequencer in Numerology, I had a modulation sequencer running Oki’s wavetable position knob all over the place. So I recorded about three minutes worth of playing the matrix “live.” This works really well for me with TonePad and other iPhone apps that I have, and it game me something useful here as well. I posted the five sequences I recorded. These are all recorded using the method described but with adjustments in the first five waves of the wavetable. About 1:15 into the song titled “Oki seq5″ you can here the beginning of the loop that I ended up using in the final piece.

Oki sequences by dance robot dance

Once I had the main clip down I was able to add in some drums made out of bits of sampled electronic toys and various other bloopy beepy oddness, mostly cut and manipulated from these bits of recorded Oki.

When you watch the movie, you’ll hear a weird reversed-and-speeded-up bit as the puzzle is being taken apart. This is the main melody just reversed and, yeah, speeded up to about 180 bpm from 130 bpm. The kick drum and snare come from Audio Damage’s new Tattoo (not a good use of a terrific drum machine but still…), adding some frenetic banging. Then a few snare hits as I reposition the box, and a final little beep — originally an accident of the song looping back to the beginning at the end, but I liked it so I added it into the sequence.

I’m hoping to soon get something useful out of the modular. This weekend I’m planning a few hours with it so we’ll see what happens. Thanks for listening.

Popularity: 25% [?]