This is a short (just over 3 minutes) video giving a very simple demonstration of 1/4, of what the Quadatrix 4 x 4 step 1V/octave Sequencer of mine WILL become.
The Quadatrix in the video has only 2 of it's coming 4 sets of 4 step 1V/oct. semitone sequencers. (There'll be 4 of them as well as 4 sets of 4 step 1V/oct. Octave sequencers).
This sequencer will be providing the ability to change the frequency of any of the 16 steps using rotary switches to select the played semitone as well as 1 of 3 octaves, for each step. Vertically, horizontally, diagonally, at random and in forward or reverse.
Currently, it's horizontal and vertical controllers are 2 x the Ray Wilson MFOS Sequencers, set up as Gate Sequencers only - as well as 4 x Ken Stone Master Dividers. (2 of his old version, modified for 7 divisions of the input clock as well as 2 of his new version with 4 dividers, each split into 0, 90, 180 and 270 degree divisions of the main input clock.)
Each of the MFOS Sequencers will also have each of their 4 controlling bits buffered and brought out to the front panel, for extra clock division control of the Quadatrix.
There'll be more videos of the Quadatrix coming during the building of it's next required modules.
Once I have 4 each of the semitone and octave 4 step sequencers - V1.00 of this sequencer will be complete. I'll also be posting the complete schematics for the entire sequencer in this thread.
Odd. I posted the video to my youtube site last night as well as in the Design section of my web page. When I logged on this morning, I saw that there had already been 80 (eighty) viewings!
Huh?? I never even advertised it anywhere. I wonder where all the viewers CAME from in the 1st place? Cool, though.
Also - once version 1 is completed, I'll be getting back to work on the final version of the Liquid Hihat as well as building the first prototype of the KAOS VCLFO and posting their schematic updates and videos to here, as well. Last edited by Rykhaard on Tue Oct 21, 2008 11:31 am; edited 1 time in total
Thanks Jan! In looking about, I FINALLY found where the 'embed' code is that I can copy, for pasting.
Blue Hell wrote:
What's this thing with the melody sequencer going forwards and backwards?
Mmmm. I can't remember where I writ that, but - using the 4 bits from Ray's MFOS Sequencer (the 4 bits decide which of the 16 steps are playing), the 4 individual sections of the Semitone sequencer and / or the 4 sections of the Octave sequencer, may be played forward or backwards.
At work tonight, I started working out patches for playing the 16 steps vertically; then switching to playing them horizontally. I think at some point, I may have to make a 'patch book' for this thing, with the huge variety of possibilities that it'll have.
Maybe I misunderstood, at around 00:40 in the vid the 2nd module from the left in the lower row having rows of four leds, the 2nd row goes forwards and backwards, that's not the melody thingie ? it seems to be correlated .... _________________ Jan
Maybe I misunderstood, at around 00:40 in the vid the 2nd module from the left in the lower row having rows of four leds, the 2nd row goes forwards and backwards, that's not the melody thingie ? it seems to be correlated ....
Ahhhh! It's the bit count controlling that of the 2 sequencers. Bit 1 is cycling faster than Bit 2. So LED's 1 and 2 are alternating. Then Bit 2 flips high, so that LEDs 3 and 4 are alternating. Then Bit 2 flips low and LEDs 1 and 2 alternate again. (If I'm recalling correctly. I can't run the videos on this machine, as with anything intensely graphic, it powers down. )
Shall clarify when back from vacation on Tuesday.
When I get the last 2 of the 4 step sequencers added to the panel, I'll do a complete explanation video, explaining how everything works. It'll be confusing to some people right now with not much of anything explained. The power possibilities of it though are huge.
some form of note quantisation would probably help if you want to change notes on the fly
I should be ok there. I've bought a slightly larger dowel for making knobs from. I'll be using that for the Fine frequency control on my VCOs and Frequency on my VCFs, as well as for Semitone and Octave switching on the sequencers.
They'll have the notes from C to B marked on them as well, to make them visually easy to see for switching quickly.
In the few tests that I've tried so far, without any knobs, the switching hasn't been too hard at all, whilst the sequencers are cycling.
I'm hoping to stay away from quantizers completely, having rotary switch switching ability for the pitches.
Sequencer 3 of 4 was started earlier today and should be finished by tomorrow afternoon before work. The 4th semitone sequencer should easily be finished by this weekend and hopefully, the multiplexer as well, so that I can start switching between the 4 sequencers as the main driving engines are cycling away.
This is the biggest part that I'm looking forward to, as I'll be able to start switching notes horizontally across the sequencers as well as vertically.
Once the 4 x 4 sets and multiplexer are done, I'll THEN do an explanation video to get the idea across, much more clearly.
Thankee muchlee sir! It'll only get better once the 4th and last sequencer is completed, as well as the multiplexer, to switch between the 4 of them. THAT is when it'll truly start standing out. Should be done within a week. Once they're completed, THEN, I'll do a full instructional video (or set, there of) along with schematics / detailed info. / diagrams / schematics, at my web site.
there are some crazy things going on there rych!
how come the stages are jumping back and forth?
what is controlling that?
Each of the 4 sequencers, are 4 steps long. Which of the 4 steps in each of them is played, is controlled by the input of 2 bits. (HIGH / LOW voltage).
When 1 of the sequencers has no HIGH bit coming in to either input, it's at step 1.
When 1 of the sequencers has a HIGH on Bit 1 (of 2), it's at step 2.
When 1 of the sequencers has a HIGH on Bit 2 (of 2), it's at step 3.
When 1 of the sequencers has a HIGH on both Bits 1 and 2, it's at step 4.
Each sequencer has 2 Bit inputs, as well as a Bit THRU (exactly like MIDI Thru), to echo it's control out to any of the other sequencers.
Any Bit cycling type (or any BIT for that matter) can be input to control which step is currently 'live'.
The steps that are live, are fed to (in these 2 demos) a VCO, then a VCF and finally a VCA.
1 of my 3 MFOS Sequencers, are controlling the envelope generators that are controlling the VCFs and VCAs. I tell each step of the MFOS Sequencer's Gates, which beat #'s to play at.
And that - is how the Quadatrix CURRENTLY, operates.
When I have the 4th and final 4 step sequencer done, there will also be an 8 input multiplexer. Which of it's 8 inputs is selected, will be controlled by it's 3 bit inputs.
The 4 sequencers Voltage outputs, can then be input into any of the multiplexer's 8 inputs, to decide when they will be live, in a VERTICAL manner. (The 4 sequencers themselves, are operating in a HORIZONTAL manner.)
When this panel is complete, it'll give me the ability with 16 steps, to come up with essentially, an endless combination of patterns.
There'll also be an OCTAVE version of this sequencer, for octave changing. Otherwise, it'll be the exact same setup.
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