---
title: vDSP_biquad_SetCoefficientsSingle
framework: accelerate
role: symbol
role_heading: Function
path: accelerate/vdsp_biquad_setcoefficientssingle
---

# vDSP_biquad_SetCoefficientsSingle

Sets single-precision coefficients of the specified single-channel biquadratic filter setup object.

## Declaration

```occ
extern void vDSP_biquad_SetCoefficientsSingle(vDSP_biquad_Setup __setup, const float *__coeffs, vDSP_Length __start_sec, vDSP_Length __nsec);
```

## Parameters

- `__setup`: The biquadratic filter setup object that the function updates.
- `__coeffs`: A pointer to the new coefficients.
- `__start_sec`: The first section that the function updates.
- `__nsec`: The number of sections that the function updates.

## Discussion

Discussion Use this function to update sections of coefficient values of a biquad setup structure. This function doesn’t allocate new memory. The range that you specify using __start_sec and __nsec must be within the number of sections that you define in the create setup function.

## See Also

### Setting the coefficients of a single-channel biquadratic filter

- [vDSP_biquad_SetCoefficientsDouble](accelerate/vdsp_biquad_setcoefficientsdouble.md)