Generic RWAC Reverb IR Content
| GenericRwacReverbIRContent | |
|---|---|
| aka Generic Reverb IR Content | |
| Resource names | IR1 |
| Type ID | 0xA028 |
| Category | Sound |
| Memory distribution |
Main Memory only |
| Editor available? |
No |
Reverb IR content is an audio resource type found only in Burnout 5 (2007-02-22 build). The only resource is IR1, contained in SOUND/IR.BUNDLE.
Assets are generated using EA Sound Exchange with the impresponse sample format specified. This creates an IRF (Impulse Respose File). Options include irfsamplesperblock<samples> and irfpercentfreqcut<percent>, which specifies the number of samples per FFT block and the percentage frequency cut of the spectrum in the IRF, respectively.
Structures
Note: Resources begin with a Binary File header.
Header
Appears to match a section of ReverbIR1::FilterInfo.
| Offset | Length | Type | Name | Description | Comments |
|---|---|---|---|---|---|
| 0x0 | 0x4 | int | id | Magic | irf1 |
| 0x4 | 0x4 | int | version | Version | 1 |
| 0x8 | 0x4 | int | numChannels | Number of channels | |
| 0xC | 0x4 | int | numSamplesPerChannel | Number of samples per channel | |
| 0x10 | 0x4 | int | sampleRate | Sample rate (Hz) | |
| 0x14 | 0x4 | int | samplesPerBlock | Number of samples per block | |
| 0x18 | 0x4 | int | samplesPerBlockRetained | Number of retained samples per block | |
| 0x1C | 0x4 | int | samplesPerFFTRetained | Number of retained samples per fast Fourier transform |
Audio data immediately follows this. Its codec is unknown, but it appears to be uncompressed.