first of all, do not edit the config.txt file, please add your custom settings to userconfig.txt
I added a warning at the beginning of the file, but apparently it’s still not enough, people keep editing it
secondly, the “slave” parameter was added to fix the problem with I2S DACs worning in master mode on the Pi5
if you want you can try to add the string without the “slave” parameter on userconfig.txt, it will override the one with “slave” parameter in config.txt