Review: iYM2151

DETUNE Ltd. gave me a copy of iYM2151 for review. This FM workstation is a faithful emulation of the classic Yamaha YM2151 chip, featured in many arcade machines, and big brother to the chip used in the DX7 keyboard. I wish I could do a video review of this one. Partially because it deserves it, but mostly because on these written ones you can just scroll down to the rating and dismiss it. Do so at your own peril; this isn’t an app for everyone, but the people it is for will love it!

iYM2151 has one of the most powerful synthesis engines on any platform, and stands at the pinnacle of what is possible on the original iPad. You have 8 different synth parts, each with their own 4 FM Voice Oscillators and 3 LFOs. Each of the Voiced Oscillators is completed with their own 5-stage amp envelopes, for hugely complex and evolving sounds. Although all of the Voiced Oscillators are limited to Sine waves, as is traditional with classic FM Synthesis, the LFOs can be Saw, Pulse, Triangle or Noise. These can drive pitch, pan or volume.

So much power!

There are 79 parameters for each synth part! No shit, I added them up. If you have no familiarity with FM Synthesis you will probably manage to shoot your eye out with this thing. I’ve spent a lot of time studying FM and I’m a little over-whelmed by it all. This is an exciting feeling though, and really, with this much to play with the price seems like a bargain.

Mod Envelopes are for chumps.

A particularly novel feature here is the ability to change any one of those 79 parameters at any given step in the sequencer. This goes way beyond some filter sweep programmed in as a MIDI control change. Any step can have an unlimited number of direct parameter changes to specific values, or you can swap out whole presets to change everything at once. This is mind boggling when you get into it.

One of their example songs uses this feature to program several different drum parts all into one synth, by changing the whole synth preset. Nearly every step has a program change from Bass Drum to Hat, to Snare, back to Hat, to Bass Drum, etc… all on top of a traditional note sequence.

You’ll want to shoot your eye out...

Unfortunately these great features are crippled by their slavish attempt to recreate 80s style digital interfaces. You can have a lot of fun experimenting with parameter changes that keep incrementing your tones, but it is a nightmare trying to keep track of it all with this interface. This design decision is maddening. Ask anyone who has ever worked on a Yamaha FM synth and they will tell you that the only thing they hate about it is the interface!

Matters are further frustrated by the manual, which is more of a decoder ring. It will tell you what everything does, but it won’t even make an attempt to explain how you might go about using that. It took me several hours to figure out that to use the Copy feature you need to select and drag the element you’re trying to copy.

After sinking many hours into this app it does become less mysterious, but that actually makes it more irritating. Now I know what it can do, but the cumbersome interface is hiding it all! Sure, it’ll let you change everything from tempo to patches with every pattern, but good luck keeping track of it all when you’re trying to compose a song.

Batteries Not Included

I can understand why they didn’t include MIDI, their own sequencer is more advanced than MIDI could comfortably handle, but MIDI keyboard input would have been nice. Also absent is AudioCopy, or even audio export of any kind. There is the ability to share your songs, but this is puzzlingly locked-in to your GPS location. No shared songs are available for me to explore in the “America/Chicago” area, and there doesn’t appear to be a way to get out of my own local zone.

If you’re a masochistic FM Synth fan, or spend a lot of time on OCRemix, then you will be able to appreciate the power here. Hell, you may even enjoy the archaic interface. Everyone else is likely to just find this a frustratingly disappointing experience.

Here is a demo I put together while exploring the app. It started off as something like Chipstep, but then I got carried away with increasingly incrementing parameter changes in the sequencer. I enjoyed the results, but I won’t be offended - or surprised - if you don’t. A lot of music explores psychedelic themes inspired by mushrooms and LSD, few venture into the more forbidden neurotoxins. Here is my take on PCP House.

iPad Music App Buyer’s Guide Rating: Pass

Recommendation: Easily one of the most powerful apps on iOS, but a terrible interface ruins it.


Buy iYM2151 Sequencer on iTunes: $34.99

Sunsine Audio sound packs and news

Sunsine Audio, independent sound designers, wrote in to tell me about their sound packs for Animoog and Sunrizer. Unlike the last guys that showed up selling Animoog patches, they have really reasonable prices. Their packs are designed to work for both the iPad and iPhone versions of each app.

$2.49 Sinerise Vol 1 for Sunrizer features Ambient pads, subtle glitches and atmospheres, thick bass, smooth 70's poly emulations, FM pianos, and sci-fi FX comprise this set of 64 presets. All presets are tagged so they can be found easily by pressing one of the patch selection buttons (Lead, Key, Bass, Pad etc.) and the modwheel transforms every single preset into another.

$4.99 Animation Vol 1 has Dubstep basses, modulation mayhem, chiptune keys, ambient voyages, hard leads and dirty funk characterize in this set of 130 presets for the award winning Animoog iOS synth.


I'm embedding their Animation demo. For more demos and to check out free samples visit their site.



They're also now working on factory loops for GlitchBreaks! I asked them about this and the new sounds will appear as part of a free update!

ReKawl Your Hardware Settings

While many folks on the Internet will extol the virtues of hardware gear, none of them mention the complete pain in the ass it can be to recall your favorite settings. Without presets, much of your time with hardware is spent trying to figure out how you got that sound you liked. The old-timers used Polaroid pictures to keep track of patches, but then you are left with trying to keep track of your snapshots!

ReKawl for iPhone, Android coming later this month, helps with the other part of that equation. Using your phone's camera to make your snapshots, it will then create indexable databases to manage them all.

via SonicState

Buy ReKawl on iTunes: $4.99 iPhone

TB MIDI & TB Tiny Stuff get Updates

The customizable MIDI controllers, TB MIDI and TB MIDI Tiny Stuff, got another big update! Both of them have the following changes:

• Customizable Shapes & Colors on all drum pads
• Toggle Groups on drum pads
• MIDI In Routing switch on sliders, knobs, faders, drum pads and XY pads

The iPad version also got a much needed Snapshot feature for storing your layout canvas. The inclusion of MIDI In is also appreciated! This will help keep track of whatever you're controlling, when the sliders/knobs/etc. are all reflecting the current values.

Both versions are still on sale, at their lowest prices ever!

Buy TB MIDI Stuff on iTunes: $4.99 iPad (On Sale, from $9.99)

Buy TB MIDI Tiny Stuff on iTunes: $2.99 iPhone (On Sale, from $4.99)

discchord - The Twelve-Stomp Program

I've been playing with GlitchBreaks a lot lately, while I assist with beta-testing the next version in a blatant attempt to court Alex as a sponsor. This turns out to be a really effective way of getting new sponsors. Certainly more so than my campaign of shame and abuse on Canis when I was trying to get Grain Science as a sponsor.

In the process of all this GlitchBreaksing I've become fairly adept with this app. I like Glitchy music, but I think it really needs to maintain musicality. I present my take on the genre which attempts to do just that, once again just using the factory sounds:

Buy GlitchBreaks on iTunes: $4.99

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