VirSyn have made a great name for themselves in the iOS world. They’ve brought us an excellent range of both synths and also FX audio units. Right now their apps are on sale for up to 40% off. But only for a very limited time indeed, until the 1st of October. If you’re not familiar with what VirSyn have to offer, here’s what they’ve put on sale.

BandShift (on sale at $6.99, normally $9.99): BandShift is a multi-band auditory filter and frequency shifter taking a new approach to manipulate the pitch of complex sound sources in realtime.

AudioEffX (on sale at $6.99, normally $9.99): Multieffect Audioprocessor Seven studio quality effect modules for live usage and to enrich your iTunes music library. All effect modules can be used together chained in any order you like.

Addictive Pro (on sale at $11.99, normally $19.99): The hybrid synthesis algorithm on which Addictive Pro is based provides you with efficient means for easy control of complex sounds far beyond usual sound synthesis methods.

ReSlice (on sale at $9.99, normally $14.99): Audio Slice Machine Slice your audio samples with ReSlice and create flexible musical atoms which can be triggered by MIDI notes or the touch of your fingers.

microTERA (on sale at $6.99, normally $9.99): Waveshaping Synthesis is a type of distortion synthesis that can create dynamic spectra in a controlled way. In waveshaping, it is possible to change the spectrum with the amplitude of the sound.

Cube Synth (on sale at $6.99, normally $9.99): Cube Synth is a groundbreaking new software instrument giving you the power and flexibility of additive synthesis together with easy editing and morphing capabilities.

Poseidon Synth (on sale at $11.99, normally $19.99): Poseidon Synth – The Ocean of Sound For all creatures in the ocean of sound – Sonic textures from other worlds, Analog signature sounds, Cut-through-the-mix leads and silkily smooth pads.

Tera Synth (on sale at $11.99, normally $19.99): Tera Synth – Modular Analog Synthesizer Explore new sound spaces with Tera Synth that go beyond the emulation of synthesizer legends.

Plus there are plenty more besides. You can find more of VirSyn’s apps here.