SOFA specifications

Specifications

• Version 0.6: Download specifications

Archive:

• Version 0.5: Download specifications
• Version 0.4: Discussion on the specifications (closed)
• Version 0.3: Download specifications
• Version 0.2: Specifications
• Version 0.1: Specifications as presented at the AES Convention 2013 in Rom

Data Types

FIR

For storing impulse responses.

Note: Delay is mandatory (set to 0 if not used).

Name	Default	Flags	Dimensions	Type	Comment
Data.IR	[1 1]	m	mRn	double	Impulse responses
Data.SamplingRate	48000	m	I	double	Sampling rate of the samples in Data.IR
Data.SamplingRate:Units	hertz	m		attribute	Unit of the sampling rate
Data.Delay	[0 0]	m	IR, MR	double	Additional delay of each IR in samples

TF

Useful to describe a transfer function by a sparse number of frequencies. The guys from BEM simulations like it.

Note: the dimensional variable N is mandatory, it must be of dimension N, and must provide the frequency values.

Name	Default	Flags	Dimensions	Type	Comment
Data.Real	[0 0]	m	mRn	double	The real part of the complex spectrum
Data.Imag	[0 0]	m	MRN	double	The imaginary part of the complex spectrum
N	0	m	N	double	Frequency values
N_LongName	frequency			attribute
N_Units	hertz	m		attribute	Unit of the values given in N

Coordinate system