LRC5 for iPhone

Product summary

LRC5 is an Audio Unit (AU) plug-in for iOS developed by Neon Silicon LLC. The companion app serves primarily as a host for the AU and includes user documentation. The AU itself is intended to run inside an Audio Unit host or a DAW on iOS rather than as a standalone effects processor.

Filter architecture and tonal range

• Three parametric peak/cut bands plus a low shelf and a high shelf provide the five-band structure.
• Each band supports up to ±24 dB of boost or attenuation for broad tonal shaping.
• Band frequencies span the full audible spectrum (roughly 10 Hz through 20 kHz).
• The Q (bandwidth) control ranges from 0.0 to 1.0; higher values produce narrower bands, but the EQ is designed more for coloration than surgical notching.

Signal routing and channel handling

LRC5 operates in mono-to-mono or stereo-to-stereo configurations, requiring the input and output channel counts to match. Channel processing is not independent — every control and preset applies uniformly across all channels.

Interface and control philosophy

Controls are optimized for touch interaction on iOS devices, with parameter adjustments and navigation tailored to a tactile workflow. For detailed usage instructions and tips on operating the AU within a host, consult the in-app documentation.

Flexible filter ordering

The five filters can be re-arranged in any sequence, allowing creative routing and unconventional EQ curves to be explored.

Suggested alternative

If you’re looking for another iOS audio app, consider eSound — MP3 Music Player (Free), which may better suit users seeking a dedicated playback app rather than an AU for host-based processing.