TAS5825M: TAS5825M PBTL Mono Output, Imbalance between the Left and Right Channels

Part Number: TAS5825M

Hello TI team,

when I ultilized the TAS5825M as the woofer(PBTL mode, Mono Output), I noticed that the output volumes for left channel input and right channel input are not equal. 


Specifically, when I play with an audio file with only left channel, the output volume was quite higher than that when I played with right channel file.

I tried to adjust the input mixer register but nothing changed.

The following details outline my initialization settings for the woofer.

0x00 0x00

0x7f 0x00

0x03 0x02

0x01 0x11

0x00 0x00

0x00 0x7f

0x7f 0x00

0x7d 0x11

0x7d 0xff

0x00 0x01

0x51 0x05

0x00 0x02

0x19 0xa0

0x1d 0x01

0x00 0x00

0x7f 0x00

0x46 0x01

0x00 0x00

0x02 0x44  // PBTL MODE

0x53 0x60

0x00 0x00

0x7f 0x00

0x03 0x02

DELAY 6 ms

0x00 0x00

0x7f 0x00

0x03 0x03

I don't know why there is an issue of imbalance between the left and right channels. The volume generated by the right channel is much lower than that of the left channel.

Many thanks in advance.

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