Echo Effects

Functions
void	audioDisableEcho (void)
	Disable echo for all voices.
void	audioEnableEcho (u8 voiceMask)
	Enable echo for specific voices.
void	audioSetEcho (u8 delay, s8 feedback, s8 volumeL, s8 volumeR)
	Configure echo parameters.
void	audioSetEchoFilter (const s8 fir[8])
	Set FIR filter coefficients for echo.

Detailed Description

Function Documentation

audioDisableEcho()

void audioDisableEcho

(

void

)

Disable echo for all voices.

audioEnableEcho()

void audioEnableEcho

(

u8

voiceMask

)

Enable echo for specific voices.

Parameters

voiceMask

Bitmask (bit 0 = voice 0, etc.)

audioSetEcho()

void audioSetEcho	(	u8	delay,
		s8	feedback,
		s8	volumeL,
		s8	volumeR )

Configure echo parameters.

Parameters

delay	Echo delay 1-7 (delay_ms = value * 16; values above 7 are clamped — the ARAM map reserves 14 KB max for the echo ring, keeping 46 KB for samples)
feedback	Feedback amount (-128 to 127)
volumeL	Left echo volume (-128 to 127)
volumeR	Right echo volume (-128 to 127)

Reconfiguration clears the whole echo ring before re-enabling echo writes (~9 ms per delay unit) — call at scene setup, not per frame. Call this BEFORE audioEnableEcho().

audioSetEchoFilter()

void audioSetEchoFilter

(

const s8

fir[8]

)

Set FIR filter coefficients for echo.

Parameters

fir	Array of 8 signed coefficients