Posts Tagged ‘blofeld’

Sometime ago I was approached by small local label “Don’t Drone Alone” and asked if I would like to make a release for them. Apparently they had heard my set for “A Working Day of Drone” and liked it 🙂

Once I saw “ripples” by genesis plays in our hearts on their website I knew they were going to be my kind of people, I’m a huge Genesis fan, so I agreed.

That release is now available to buy, you can get a physical cassette or a digital download. I do recommend the cassette, if only for the awesome artwork that Christian Harrop did for it. All my albums have had ‘artwork’ done by me and as I’m no artist I’ve generally used photographs … but I’m not a good photographer either. So it’s a real delight to have quality artwork drawn by a quality artist!

Side 1 is based on the sort of show I tend to do live, it’s mostly electric violin with lots of effects pedals. I’ve used the Blofeld synth on there to fill in some textures but there’s actually a lot less synth on there than you might think on first listen … I can get some great sounds from those pedals. The title “From The Carboniferous” refers to an abandoned quarry near to where I live that allegedly has strange creatures living in it.

Side 2 is a short ‘sci-fi’ style piece played entirely on keyboards. The Yamaha Montage to be precise.

Both tracks were recorded in a single take (with a little editting to remove the occasional pedal pops and bangs) from ideas I already had. Although they were done in one take, they are not necessarily the first take!

The tapes are limited to 50 copies so be quick if you want one of those. I should have some to sell at a gig I’m playing on the 27th of July at the The Fenton in Leeds.

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As I blogged earlier I’m enjoying using the Roli Seaboard with the Waldorf Blofeld hardware synth. So I thought I’d share how I create patches that make good use of the capabilities of the Roli with the Blofeld. In the video below I take a very basic sawtooth wave and turn that into an expressive (if still not especially beautiful) patch in the Blofeld. You can apply this knowledge to your own patches and make them ‘Roli Aware’ so that you can play them expressively.

The basic steps are as follows:

  • Set the oscillator bend range to 24 so that you can slide up and down the Seaboard. The Blofeld doesn’t allow you so bend more than 2 octaves so it works fine on the Seaboard 24 but might not be quite as good on the 49.
  • Add a low pass filter and set the cutoff down to 20, and allow the modwheel to modulate it. The Roli sends CC74 for the ‘slide’ dimension which is not very useful on the Blofeld so I mapped it to the modwheel (CC 1) using the Reaper CC mapper as shown below. Other DAWs might have similar capabilities. It’s quite easy to do in Max or Pure-Data too.ccmap
  • The Roli starts the slide with value 64* (the middle of the 0-127 range) when you press a keywave regardless of where you start, and modulates it down or up from there – so be aware of this when you create your patch. It needs sound good with the modwheel halfway. This is why I start the filter at 20 and not 0.
  • Set the amplitude envelope attack and release to 64.
  • Set the mod matrix to Velocity modulating AE attack at -64. This allows you to press the keywave gently to get a slow attack, and quickly to get a fast attack
  • Set the mod matrix to Release Velocity (Rel.Velo) modulating AE Release at -64. Now when you release a keywave quickly you get a quick release and slowly you get a slow release. These two options allow you to play legato and staccato with the same patch. I love this feature!
  • Set the mod matrix Pressure to modulate Volume +64 – this allows you to increase the volume just by pressing harder on the keywave.
  • Set the Amplifier volume to 0. Otherwise the Pressure modulator won’t do anything as it can’t make the volume any louder than 127.
  • Save the preset

That’s a basic preset that will work with the Roli in single channel mode. To really get the best out of it you need to create a Multi with the same patch in slots 1-10. That way the Roli can send a note on each MIDI channel and they can act independently.

Be sure that the multi preset you use has the MIDI channels differently for each part number – this is the default so that channel 1 goes to Part 1, channel 2 to part 2 etc. You also need to set the MIDI channel (in Global options) to Omni, or the Blofeld will only listen on one MIDI channel. I forgot to mention this in the video.

And that’s it! Even with a bare sawtooth that is quite fun, but once you get your own really nice sounds you can exploit to potential of the Roli Seaboard to it’s full, expressive maximum. Of course you can, and should, experiment with the values shown here they are intended as a starting point for making your own expressively played sounds.

Here’s the video showing the whole process from start to finish, along with a completed patch:

  • If you set the Seaboard to MPE mode (using the dashboard) then the starting point for the ‘slide’ dimension will depend on where you press the keywave. I don’t think this is mentioned in the manuals, Rol support told me about it!

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I was playing with the wonderful KMI QuNeo controller the other day and started experimenting with bending synth notes and/or filters using the pressure and X/Y positions on the pads – I’m a violinist, it’s what we do! This works really well for single notes but because things like bends and filter positions are a single CC sent to affect all of the notes played on a synth it’s much less useful when playing more than one note. Worse: if you move one finger then another, the CC value jumps between the two positions giving you a very glitchy sound. Some might like this effect but it’s not what I’m going for.

So, remembering that MIDI has an ‘aftertouch’ option I started looking into that. I didn’t really have a clear idea what aftertouch was, I’d played a StudioLogic Sledge2 synth in a shop and felt the extra travel on the keyboard and thought that seemed to be what I needed. However it turns out that there are TWO types of aftertouch.

‘Channel pressure (aftertouch)’ is pretty much just another modwheel-type controller – but usually controlled from the keys themselves which does make it handier than a modwheel when performing. It affects the whole synth though and therefore suffers from the same problem as a modwheel or global CC. This is the what most manufacturers seem to mean when they ‘support aftertouch’ I found out – including the Sledge. ‘Polyphonic Pressure (aftertouch)’ is the thing I wanted – and it’s much harder to find, in both synths and keyboards. The only synth I have that supports it is the Waldorf Blofeld (ah Blofeld, how do I love thee, let me count the ways). To test this I wrote a small Max patch that added Poly Pressure messages to the last note played on the keyboard, and controlled it from an on-screen slider (see video below). Using this I could bend one note in a chord while the other stayed the same. Yes!

The problem now was that the QuNeo, while being a very flexible controller, is actually very limited in what MIDI messages it will send. Basically it only sends note and CC messages – and they have to be on the same channel for each pad. Contrast this with the SoftStep2 (my first KMI purchase) that will send almost anything. Luckily I’m a programmer and have been working with my Raspberry Pi system for a while now so I wrote some code that converts the CC numbers sent by the QuNeo to PolyPressure messages.

The way this works is that all of the pads send notes when pressed and send the same CC number with pressure information, all on MIDI channel 10 (eg I press pad 4, it sends note on for MIDI note 44, and continuously sends CC 44 with the value of my finger pressure). The Raspberry Pi code then intercepts any channel 10 messages, converts any notes back to channel 1, and converts all CCs to channel 1 Poly Pressure messages. The sliders and knobs still send their existing CCs on channel 1 so that they can still do the normal global synth control things such as filter and volume changes.

I don’t know why Poly Pressure is so underutilised, I really like the results I can get with this system and really wish there were more polyphonic controls available, but I intend to make best use of the one I have, even if it’s only on one synth. It would also be nice if more synths supported it. I know some old synths from Ensoniq and Roland do but I don’t ‘do’ vintage synths – for reasons of my own.

Not even any softsynths (that I can find, though as I’m not a fan of them I didn’t look very hard) seem to do this which is bizarre given that it’s a logical place for that sort of code to reside. The fact that Ableton seems to actively remove poly pressure messages from the MIDI stream probably isn’t helping this *sad face*.

I suspect it might be catch-22. Few synths support polypressure because hardly any keyboards do, and hardly any keyboards do because few synths do. While researching this I did find a keyboard that supports Poly Pressure (supposedly) and have ordered it off eBay – because it’s discontinued. When it arrives (and if it does what I hope) I’ll update this blog post with the results.

Maybe I should save up for a Roli Seaboard  (eek!)

Here’s a video I made showing my experiments. In the first part you can see the filter setting jumping around. In the second I made a Max patch that was a proof-of-concept – mainly to make sure that the Blofeld did what I hoped it was going to do (note there’s a bug in that patch the doesn’t take into account NOTE OFF messages). Lastly there’s the QuNeo running via my Raspberry Pi system that converts CCs to PolyPressure messages.

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My Christmas present to myself this year was a Waldorf Blofeld synthesizer. It’s a polyphonic, multi-timbral digital synth in a small box for £309 – and it’s an amazing instrument!

I’d always been a little sceptical about digital hardware synths, I have a fair few software synthesizers that I’ve used on various projects and wondered what benefit a hardware synth gives you, apart from extra baggage to carry around when you’re gigging. Analogue synths I understand, they sound very different to their digital emulations, but a digi-synth … thats just code, same as what’s in your laptop, right?


The sound quality of the Blofeld is fantastic. It’s a fully rounded sound with no harshness and it sits in a mix like it has a right to be there. No spending ages EQing out the bits of the sound you don’t like. OK, I’m not seasoned expert on this subject I admit, so read Stuart’s Russell’s words on his Waldorf Streichfett which he bought at the same time, then come back.

OK, convinced? Maybe not but I reckon if you try one you might be.

I got the ‘desktop’ version of the Blofeld rather than the keyboard one as I’m (still) not really a keyboardist and already have a controller keyboard and a fairly full studio, which also now includes a 5 foot giraffe, but that’s another story.

Because the Blofeld is such an amazingly capable synth it’s quite complicated to work from its front panel. Unlike most analogue synths it’s not really possible to bring out all of the controls onto buttons, knobs and sliders as the case would be HUGE and unwieldy, so the instrument has a small number of knobs and buttons that access all sorts of menus. This makes it very tempting to set up presets and just play those, which I don’t think is really in the spirit of synthesizer playing. You can (just. The Blofeld is the white thing underneath the MicroBrute in the bottom-left inset) see me attempting to manage the menu system while playing live in the CSMA video which we filmed for the album “The Dog Ate My Max Patch“:

So I got to wondering how better to control the parameters of the sounds while playing live and ended up working with TouchOSC – an app for Android and Apple phones and tablets that can wirelessly send MIDI and/or OSC commands to a laptop. The clever thing about touchOSC is that you can design your own interface … this is perfect!

I worked out the sort of parameters I would like to be able to manipulate on the synth and laid them out on the TouchOSC screen. I included a small 1 octave keyboard and 2 XY controllers. The XY controllers are really useful in this context because some genius at Waldorf decided to have 4 arbitrary-assignable parameters for each preset (called W, X,Y & Z) that are always controlled by the same MIDI CC numbers. So on some presets I can have WX modifying a filter sweep and resonance and on others an oscillator pitch (for example) with no extra programming on the tablet side – a bit like 4 extra modwheels in a way. The TouchOSC screen (download link) always sends the same MIDI codes to the Blofeld regardless of which voice is active.

Blofeld-touchOSCAs you can see, I’ve also included quite a few other things too, that can control useful bits of the synth, including the sustain pedal (top right) and the arpeggiator controls. The octave slider (bottom right) is the one thing that does not go direct to the Blofeld as I don’t know any way of changing the octave of a keypress inside the synth, so instead it drives a custom JS plugin that I wrote for REAPER that adds some multiple of 12 to the key number before sending it on. On the whole it’s a really flexible system!

I have 3 of these pages, all different colours so I easily know which page I’m on. These send to MIDI channels 1,2 & 3 and again these go straight (apart from the octave slider) to the Blofeld so that in ‘Multi’ mode you can play 3 voices at a time. I’ve found that this is a good number to work with both for keeping track of what is happening and keeping within the limits of the Blofeld’s DSP. Page 4 of the screen is just 2 2-octave (plus a bit) keyboards that control the upper two voices, I will probably mostly use the lower one for drones or arpeggiations as you can hear in the video below.

The other great thing about hardware digital synths is that they ‘fail-safe’. If you use a lot of synth plugins on a laptop and run out of steam on the CPU you get delays, jitters, pops, crackles and all sort of unpleasantness. On the Blofeld it will usually just either not play the not you’ve asked for or drop the first note in the list of ones its playing. The sound stays beautiful throughout.

Currently I’m using the laptop running REAPER to relay the TouchOSC commands from the tablet to the synth. But for really lightweight gigging I reckon (though haven’t tested it!) that it’s possible to build a small Arduino box that reads the Wifi signals from the tablet and relays them to a MIDI socket … maybe that’s a future project.

To prove a point, here’s me playing three voices of the Blofeld, using just the TouchOSC interface I made. It’s not editted in any way, you can even see me puzzling over why things are not quite behaving as I expected in places 🙂

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