It’s easy for me to assume that everyone has already seen or got Moog’s excellent iOS apps, but that’s not always the case. If you don’t know any of these fine apps then now would be a very good time to look as they’re all on sale. So let me give you a quick overview of what’s there and you can decide what you do next.

Filtatron was the first app that Moog released and was a bit of a surprise in many ways. It wasn’t what we’d expected. Moog describes it as “is a realtime audio filter and effects engine”.

Here are some Filtatron basics:

OSCILLATOR – A high-resolution, alias-free DSP oscillator with sawtooth and square waveforms, adjustable frequency from 0.3 Hz to 2kHz.

FX MODULES – Amp provides warm, smooth overdrive with feedback control. Delay can be modulated by its own LFO (with rate and depth controls) and delay time is smoothly interpolated for analog-style delay time tweaks.

LFO – Five waveforms: sine, ramp, sawtooth, square, sample & hold, with crossfade and morph between adjacent LFO shapes.

ENVELOPE FOLLOWER – Uses the volume envelope of sound inputs to sweep the filter, with controls for amount and speed.

PRESETS – Filtatron comes loaded with edgy presets to kick-start your sound.

RECORD AND PLAYBACK – All audio processed in stereo, 16bit, 44.1kHz resolution. Filtatron will record samples up to 10MB.

FILE SHARING – Easily move audio files back and forth between the Filtatron and your computer. Built-in email function allows sharing presets with your Filtatron bandmates. Samples can also directly be shared on SoundCloud.

MIDI MAPPING – Almost every parameter can be controlled over MIDI. Use hardware controllers or external sequencers to control Filtatron remotely. Check the MIDI menu on the ‘About’ page.

The next app that Moog released was Animoog, which they describe as:

powered by the new Anisotropic Synth Engine (ASE), is Moog Music’s first professional polyphonic synthesizer designed exclusively for the iPad. ASE allows you to move dynamically through an X/Y space of unique timbres to create a constantly evolving and expressive soundscape.

Animoog was quickly followed by Animoog for iPhone, which, as you can guess is very similar to Animoog.

Last, but absolutely by no means least is Model 15. Moog describe it as:

The Moog Model 15 App is the first Moog modular synthesizer and synthesis educational tool created exclusively for iPad, iPhone and iPod touch.

Each facet of the Moog Model 15 modular synthesizer has been meticulously recreated in this application to ensure the power and transcendent sound quality of each module remains intact. The character, harmonic complexity and mystique of the Moog Model 15’s modules, from the legendary Moog 921–series oscillators and 904A Low Pass Filter, to the coveted 907 Fixed Filter Bank have been painstakingly preserved.

Now to what the sales are all about:

Filtatron is on sale for $1.99 (down from $5.99):

Animoog is on sale for $9.99 (down from $29.99):

Animoog for iPhone is on sale for $1.99 (down from $5.99):

Model 15 is on sale for $9.99 (down from $29.99):