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Unanswered forum topics

Single Cell Software

Submitted by Rej – Dev on Fri, 09/28/2018 – 19:21

While I’m still working on my own project(s), I thought I’d share this announcement about an app Mike has been working on for quite a while. For those who don’t know, Mike is a friend of mine who made this website and curates it. He’s also big into music apps and has always wanted to create his own. This is his biggest and most ambitious project to date. It uses Caustic’s audio engine at its core, but everything else, from the streamlined workflow to the smooth snappy graphics is his own creation.

I encourage you to check it out on the Play Store. Here’s a rundown of what it is:

Drum Pad Beats is a fun beat/composer – scene/remixer to capture those ideas when that flash of inspiration hits while away from the studio.

Drum Pad Beats is aimed at users that want to create rhythms and melodies using pads and step sequencers. With the added ability to export their creations to wav, ogg or midi loops (zip, pcmsynth for Caustic), user ideas can be taken farther in mobile or desktop Digital Audio Workstations.

Great for sharing beats/tracks as dpb files and remixing another artist’s track, the track could then be remixed again adding even more flavor. Drum Pad Beat’s project file contains everything another user needs to take that idea even farther.


+ Adjustable U/I scaling (Settings)
+ Portrait or Tablet layouts
+ In App Help UI with documentation tips
+ 16 Drum pads, 12 Synth pads
+ Dual pad layout for Drum and Synth pads on one screen (remixing/recording live)
+ 63 Scene containers for programed Pad loops w/ 1 2 4 8 measures
+ Song sequencer with 16 playable/exportable sections.
+ Sampler and Chord Arpeggiator, diatonic chord interval arpeggios
+ Keyboard layouts for synth or sampler, 64, 36, 16 pad variations
+ Custom Scale and Key globally or per Scene
+ Record real-time remixes from pad looping and Scene changes as wav, ogg, midi
+ Record overdub for note entry (touch latency varies per device)
+ Metronome timing
+ Full Mixer and Effect for all Drum/Synth pads
+ Drum pad choke groups (4 groups per 8 pads)
+ Audition Browser to load/hot-swap new Drum/Synth kit sounds
+ Expandable Sound Library with Sound expansion packs available on Google Play.
+ Factory Sound Kits (808, 909, Metatronics, various others)

As this is not my app, please head over to Mike’s support channels for any questions or discussions:

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New to Drum Pad Beats? Check out the friendly, In App Help UI and Quick Start Guide: https://www.teotigraphix.com/help/drum-pad-beats/index.html

  • Read more about Introducing . Drum Pad Beats
  • Rej – Dev’s blog
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Caustic 3.2

Submitted by Rej – Dev on Wed, 02/01/2017 – 05:11

Lots of videos showing the new stuff , links to the others at the bottom of each one. Here’s the overview of what’s new in 3.2

Desktop versions. Free, full version, but no support.

  • Read more about Caustic 3.2
  • Rej – Dev’s blog
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transient – ebb & flow

Submitted by Rej – Dev on Tue, 04/12/2016 – 00:23

Long-time Caustic user transient made this album using Caustic and my upcoming mastering app. I’ve always been impressed by his work, great stuff Carl!

It’s a free download on his website but if you like his work, he’s offering hundreds of tracks for just a few bucks so go support him.

  • Read more about transient – ebb & flow
  • Rej – Dev’s blog
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No one swings like the Volca Sample – KORG’s sync signal explained

Submitted by Rej – Dev on Tue, 03/03/2015 – 21:01

I was looking into adding sync signal capabilities to my CEVS app to mimic what KORG have in their SyncKontrol app for iOS. Their app generates an audio pulse which can be used to control tempo on Monotribe and Volca machines. Adding it to CEVS would mean people on all platforms could benefit from the extra control as well as adding swing capabilities to machines without a swing knob such as the Volca Keys, Bass, etc.

The Volca Sample does have a swing knob but many have noticed that it doesn’t seem to send its swing signal via the “sync out” jack unfortunately. The following post is the result of my research into KORG’ s sync signal and explains why other Volcas just can’t swing like the Sample. If someone from KORG wants to chime in and correct or confirm my findings (paging Takahashi-san) , that would be awesome.

Open the following image to follow along. It might look a bit technical but I’ll do my best to keep to simple terms.

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Figure 1 shows KORG’s basic sync clock in pink. A clock signal is just that, a reliable voltage pulse either from the machine itself or from another source that comes around on time, regularly, like seconds on a clock. Synths “listen in” on this signal to sync up their sequencers, LFOs, etc. Below that are 16 step boxes which represent the steps on a Volca machine. Notice how they appear at regular intervals. This is because their timing relies on the sync clock.

The first thing to notice is that the clock skips a 16th note step, it actually lines up with 8th note timing instead. This is very important and the main reason why we’re seeing some strange things between machines. Having a clock that runs slower than your smallest step isn’t a big deal, electronics can easily work out sub-step timing as soon as they receive 2 pulses. The problem comes when you want to create effects like swing.

Swing (sometimes called shuffle) is the change in timing from a straight, evenly-spaced sequence. It’s often used to create more human, less-mechanical rhythms. An example in nature would be the human heart. It doesn’t go BOOM-BOOM-BOOM, it goes, BOOOM-baBOOOM-baBOOOM due to the timing of the various squishy valves in there. In musical notation, this is often represented by dotted notes. One note is held a bit longer, at the expense of the next note which comes in a bit later and gets shortened by an equivalent amount.

The size of the note we chose to stretch is what defines the type of swing. If we use 8th notes as our measure of the “note”, and then play fast (16ths) notes we get a swinging effect that sounds more rigid, like a military snare march. If we use 16th notes as the swing unit of measure, we get a more groovy “house / hiphop” sound. (see audio examples at the bottom of this post)

Looking at Figure 2, you’ll see how the SyncKontrol app creates swing by delaying every other 8th note pulse. The timing delay is defined by the swing amount in the app and goes from barely noticeable to extreme where the second note has barely started before the next comes in again. When we apply this to a machine with a 16-step sequencer, we see that the two first steps are longer and the second two are shorter and delayed. This is because we’re essentially splitting our swung 8th notes into halves to get our 16ths note steps.

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Now in Figure 3, we see how the Volca Sample does its own thing and (I presume) modifies the sub-divided internal clock of higher precision to control swing when you turn the physical knob on the unit. The swing modifies every second 16th note this time (dark red clock), giving us the nicer swing effect. When it comes time to generate a sync signal for the Sync Out jack, it uses every other clock pulse in order to create a compatible signal to the standard already established. (pink clock). You’ll notice how those pulses aren’t affected by the Sample’s swing, which is why we perceive the Sample to not send its swing across to others.

Conclusion: Apart from working with hacks like working in double-time (and spreading out your beats over 2 parts), the other machines simple will never be able to swing like the Volca Sample. The timing protocol is established to 8ths notes and changing that in the future would mean old machines would play twice as fast. Why KORG chose this is a mystery, seems odd given that most synths since forever have relied on 16-step sequencers. Maybe a decision was made in the name of simplifying things for low-cost machines, maybe it was historical reasons to be compatible with even older machines (I’ll admit I’m pretty new to hardware synths). Maybe an oversight with regards to ever offering swing in the first place. But hey, at least knowing why helps quell the frustration, right?

And to answer a question which I’m sure will come up: Yes, I’ll be adding my “SyncKontrol” module to CEVS anyway. Just don’t expect miracles from it.

Here are some audio examples to help explain the difference between no swing, 8th note swing and 16th note swing (same beat used, created in Caustic, shuffle set to 50%)

As an interesting side-note: What happens if you send a swung synckontrol signal to a Volca Sample that’s got its swing knob turned up? A multiplied result which sounds really weird. Every step in a 4-step sequence starts long and gets shorter and shorter. I’ll save you the graph this time but you can try for yourself.

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