Equalizer / Compressor

ChStrip is an AudioUnit Extension channel strip  plugin which contains an equalizer and a compressor for tracking and mixing. The equalizer is a three band EQ consists of low shelving filter, mid peak / notch filter and high shelving filter. The compressor is a dynamic range compression module uses feed-back topology for natural and musical sound. Both of the equalizer and compressor are not emulation of the particular hardware, but they are build by incorporating the techniques used for the analog circuit modeling.


ChStrip  (AUv3)
– 3-band EQ, Low Shelving filter, Mid Peak / Notch filter and High Shelving filter.
– Stereo dynamic range compression
– Feedback topology (Implemented by delay free feedback loop)
– Side chain high pass filter
– Soft clip / Peak Limiter
– Auto fade in and auto fade out
Host application uses system audio input as an audio source and processed audio signal is routed to the system audio output.



Low Shelving

Frequency Range: 21Hz – 1092Hz
Gain -INF – +12dB
High Pass Filter response: 12dB / Oct

Mid Peak / Notch

Frequency Range: 151Hz – 2389Hz
Gain: -14dB – +14dB
Bandwidth: 1 octave

High Shelving

Frequency Range: 296Hz – 21096Hz
Gain -INF – +12dB
Low Pass Filter response: 12dB / Oct


Input Gain

Range from -20dB to 20dB

Side Chain Highness Frequency

Range from 20Hz to 185Hz


Range from -40dB to 0dB

Makeup Gain

Range from 0dB to 20dB


2, 4, 10


0.01ms, 0.1ms, 0.3ms, 1ms, 3ms, 10ms, 30ms


0.1s, 0.3s, 0.6s, 1.2s, Auto


Soft Clip, Peak Limiter or OFF


Range from -1dB to 0dB

Dry / Wet

Range from 0% to 100%

Output Gain

Range from -66dB to 0dB

*Appearance and specification of products are subject to change without notice.


User Guide (V1.7)

ChStrip is available now on the Apple App Store.

Release Note

Version 1.0

  • Initial release

Version 1.1

Version 1.1 contains new features and bug fixes.
  • Clip type can be selected from soft clipper or peak limiter. Peak Limiter provides clean sounding signal compares to the output of the soft clipper. Peak Limiter is an analog style limiter. It is not a lookahead brick wall limiter, so that it can’t offer brick wall limiting. However it does not introduced any latency to the output signal.
  • Added fine tune buttons to dial UIs.
  • Extended touchable area of slider UI.

Version 1.1.1

Version 1.1.1 contains minor bug fixes.

Version 1.2

Version 1.2 contains improvements and bug fixes.
  • Support iOS 14 / iPadOS 14.

Version 1.3

Version 1.3 contains improvements and bug fixes.
  • Support iOS 15 / iPadOS 15.

Version 1.4

Version 1.4 contains improvements and bug fixes.
  • Support iOS 16 / iPadOS 16.

Version 1.5

Version 1.5 contains improvements and bug fixes.
  • Fixed a problem that AudioUnit Extension doesn’t load in host application.

Version 1.6

Version 1.6 contains improvements and bug fixes.
  • Support iOS 17 / iPadOS 17.

Version 1.7

Version 1.7 contains improvements and bug fixes.
  • Added functions to export/import user presets to iCloud in order to copy the presets from one device to the other device.