KQ Voice Plugins is a collection of Audio Units designed for iPhone, developed by Ryouta Kira. This set includes essential tools such as Loopback, Vocoder, Pitch Shifter, and Noise Suppression. To utilize these plugins effectively, a host application compatible with Audio Units is required.

The Loopback feature enables the seamless transfer of audio, MIDI signals, and mixer connections between host applications. However, it's important to note that direct inter-app recording may not be supported. The Vocoder function processes input sound with a carrier, creating distinctive robot-like voices. Pitch Shifter offers the ability to alter the pitch of audio, while Noise Suppression utilizes RNNoise for efficient noise removal, specifically optimized for voice applications.