LRC51.13 - App Store

LRC5 is an Audio Unit, or AU, for iOS. This application is simply a container for the Audio Unit and serves only as the documentation. LRC5 must be used in some sort of Audio Unit host or DAW application.

LRC5 is a five-band EQ. It includes low shelf, high shelf, and three parametric peak/cut filters. The filters can boost or cut by 24 dB. The frequency range for each of the filters is 10 Hz to 20 kHz. The filters aren't restricted to stay in any order. If a filter is set to a level of 0.0 dB it is turned off. You can also set the "Q" factor of each of the filters. The value ranges from 0.0 to 1.0. For the three peaking filters, a value of 1.0 gives a fairly narrow frequency band, but LRC5 isn't really designed for surgical frequency work. It is aimed primarily at coloring of the signal.

LRC5 can be used in a mono-to-mono or stereo-to-stereo setting. Actually, it is only restricted to having the same number of input and output channels. The channels aren't independent. The controls and settings are applied the same to all channels.

Editing of the control parameters is a bit different than is typical for an EQ. The intention is for it to be comfortable to use on a touch based interface. Please refer to the documentation in this App to learn how to control LRC5.

Version History Fixed a bug that might cause the effect to not reset when a host requests a reset. 1.13 05/27/2022 Fixed a bug where the High Shelf Frequency parameter was misnamed in AU hosts. 1.12 02/13/2022 Changed the audio processing to upsample low sample rate tracks.
Provides increased audio quality when EQ settings are close to the Nyquist frequency of low sample rate tracks.
Provides better support for use on some smart instrument and sampled tracks in GarageBand. 1.11 05/20/2021 Add support for running when the host sample rate for a track is set to less than 44.1 kHz.
Added support for running on smart instrument and sampled tracks in GarageBand where the sample rate is set to 22050 Hz.
Fixed a bug that could crash the audio processing when the sample rate set by the host was below 44.1 kHz.
Updated the UI to reflect the limit the filters can move to in low sample rate settings.
Please see the documentation in the container app for more information on these updates. 1.10 04/26/2021 Fixed a bug that could cause a crash when dragging a preset file onto the presets panel.
Fixed a bug that could cause a crash when an AU host deleted a preset
Fixed a bug that caused issues with loading user presets on some hosts.
Added support for exporting presets to the macOS version of LRC5 1.9 04/13/2021 Bug fixes.
Fixed an issue with LRC5 not passing AU validation.
Bringing the iOS version up to the macOS version. 1.8 03/31/2021 Added support for AudioUnit hosts to interface to LRC5's custom user presets. 1.6 09/20/2020 Added ability to A/B EQ settings via a contextual menu.
A long press on the LRC5 interface will bring up the contextual menu. Please see the documentation in the container app for more details and hints on how to use the new feature. 1.5 09/28/2019 Added support for basic parameter automation and MIDI automation. Please see the documentation for details.
Some enhancements to support user presets. 1.4 08/19/2019 Fixes for potential memory leaks. 1.3 05/13/2019 Fixes for UI stability.
Fixes an issue with loading saved state in some hosts.
Fixes a minor issue with preset management and Drag and Drop. 1.2 03/14/2019 Improves stability. 1.1 02/26/2019 1.0 02/06/2019