McASP(Multi-channel)+EDMA

hi,

the dome "C6748_StarterWare_1_20_04_01"  mcaspPlayBK.c only used a single channel.

how to configure McASP(Multi-channel)  to output?

/*
** Default paRAM for Transmit section. This will be transmitting from
** a loop buffer.
*/
static struct EDMA3CCPaRAMEntry const txDefaultPar =
{
(unsigned int)(EDMA3CC_OPT_DAM | (0x02 << 8u)), /* Opt field */
(unsigned int)loopBuf, /* source address */
(unsigned short)(BYTES_PER_SAMPLE), /* aCnt */
(unsigned short)(NUM_SAMPLES_LOOP_BUF), /* bCnt */
(unsigned int) SOC_MCASP_0_DATA_REGS, /* dest address */
(short) (BYTES_PER_SAMPLE), /* source bIdx */
(short)(0), /* dest bIdx */
(unsigned short)(PAR_TX_START * SIZE_PARAMSET), /* link address */
(unsigned short)(0), /* bCnt reload value */
(short)(0), /* source cIdx */
(short)(0), /* dest cIdx */
(unsigned short)1 /* cCnt */
};

Thanks.