This version (18 May 2021 08:51) was approved by Nikhin Shetty.
Table of Contents
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Phat-Stereo
Description
Phat-Stereo is a spreading algorithm that uses stereo cross-coupling to simulate surround sound in stereo speakers and other 2-channel situations. The ear is most responsive to interaural phase shifts below 2 kHz, so this increase in phase shift results in a widening of the stereo image.
A 3D enhancement, it yields an enriched surround field both for headphones and for stereo speakers.
Targets Supported
| Name | ADSP-214xx | ADSP-215xx/SC5xx | ADAU145x/146x |
|---|---|---|---|
| —————————— | ——————-- | ——————————-- | —————————- |
| Phat-Stereo | S | S | S |
Pins
Input
| Name | Type | Description | |
|---|---|---|---|
| ———————- | ————-- | ———————- | |
| Input0 | Audio | Input Channel0 | |
| Input1 | Audio | Input Channel1 | |
Output
| Name | Type | Description |
|---|---|---|
| ———————- | ————-- | ———————- |
| Output0 | Audio | Output channel0 |
| Output1 | Audio | Output channel1 |
Configurable Parameters
| GUI Parameter Name | Default Value | Range | Function Description |
|---|---|---|---|
| —————————————- | ———————- | ———————— | —————————————- |
| Cut Freq (Hz) | 150 | 20 to 20000 Hz | Controls the cutoff frequency of the first-order low-pass filter. Determines the frequency range of the added out-of-phase signals. |
| Level | -70 | -96 to 6.0 dB | Controls the output level of the filter |
DSP Parameters
| Parameter Name | Description | ADSP-214xx/SC5xx/215xx | ADAU145x/146x |
|---|---|---|---|
| —————————————- | ——————————————————————————-- | —————————————- | —————————- |
| AlphaSpread | Scales the spreading value | Float | 8.24 Format |
| SpreadLevel | Scales the gain of spreading signal | Float | 8.24 Format |
DSP Parameter Computation
AlphaSpread = 1.0 - 2.7^(-6.28 * CutFreq/ fs)
SpreadLevel = 10^(Level/ 20.0)
resources/tools-software/sigmastudiov2/modules/adialgorithms/phatstereo.txt · Last modified: 11 May 2021 08:32 by John Joseph