Playing different tracks on left and right channels at the same time

[MP@L&T]

Hi everyone,
If anyone could help with me problem I would be much appreciated.

I have a ESP-Lyrat board and got it serving a website and playing music using the pipeline and I2S.
I want to split the I2S into separate channels and play different tracks from the left and right channels for both I2S0 and I2S1 to have 4 channels of audio.

I have a I2S split and mapped to different buttons so it plays different tracks from different audio channels when a touch pad button is pressed but when I press play for both the music that plays is just noise and not a track from the sdcard.

Is this possible, thanks for any help?