Skiff
Apple's Audio Units · Reference
macOS ships 23 effect Audio Units. They're free, stable, and already in Add Audio Unit, under Apple.
01Tone
| Unit | Use it for |
|---|---|
| AUNBandEQ | Many bands of any filter type. AutoEq profiles use it. Bands start bypassed. |
| AUParametricEQ | One bell: a single fix |
| AUGraphicEQ | 10 or 31 fixed sliders |
| AULowShelfFilter | More or less bass, 10 to 200 Hz |
| AUHighShelfFilter | More or less air, 10 to 22 kHz |
| AUHipass | Cutting rumble under a voice |
| AULowpass | Cutting hiss and harshness |
| AUBandpass | Keeping one band: a telephone voice |
| AUFilter | Several filters in one |
02Level
| Unit | Use it for | Adds |
|---|---|---|
| AUDynamicsProcessor | Compressor and expander: evening out a voice | 6 ms |
| AUMultibandCompressor | Four-band compressor: films, broadcast loudness | 6 ms |
| AUPeakLimiter | Last stage of any chain that adds gain | 2 ms |
03Clean-up and timing
| Unit | Use it for |
|---|---|
| AUSoundIsolation | Machine-learning voice isolation for noisy rooms |
| AUSampleDelay | Delaying audio up to 4,410 samples, when sound runs ahead of picture |
04Effects
| Unit | Does |
|---|---|
| AUReverb2, AUMatrixReverb | Rooms and halls |
| AUDelay | Echo |
| AUPitch, AUNewPitch | Pitch shifting |
| AUDistortion | Distortion, ring modulation, decimation |
| AURogerBeep | A radio beep when you stop talking |
| AURoundTripAAC | Hearing what AAC encoding does to your audio |
| AUNetSend | Sending audio over the network; legacy |
Related: Podcast voice · Night mode · Third-party plug-ins
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