---
title: vDSP_biquad2_CopyState
framework: Kernel
role: symbol
role_heading: Function
platforms: [macOS 10.9+]
path: kernel/1532220-vdsp_biquad2_copystate
---

# vDSP_biquad2_CopyState

Copies the filter state from one biquadratic filter object to another.

## Declaration

```occ
void vDSP_biquad2_CopyState(vDSP_biquad_Setup, vDSP_biquad_Setup);
```

## Parameters

- `Parameter 0`: The destination biquadratic filter object.
- `Parameter 1`: The source biquadratic filter object.

## See Also

### Biquadratic Infinite Impulse Response (IIR) Filters

- [vDSP_biquad2](kernel/1532195-vdsp_biquad2.md)
- [vDSP_biquad2_CreateSetup](kernel/1532224-vdsp_biquad2_createsetup.md)
- [IIRChannel](kernel/iirchannel.md)
- [vDSP_biquad2_ResetState](kernel/1532215-vdsp_biquad2_resetstate.md)
- [vDSP_biquad2_DestroySetup](kernel/1532201-vdsp_biquad2_destroysetup.md)