How to use I2S in ESP boards? I have researched this a lot, but haven't found anything on which I can trust.
I want to use a particular ESP board to play audio. To play audio, I2S support is required. But, I know that not every ESP board break out the I2S pins from the chip. According to me, buying an ESP32 only to use the I2S would be a waste of money. So, my question is, if I just want to use I2S, which board is would be suitable? Please provide some references if you can.
Few months ago I tested successfully I2S with this library, I used the default pins: 

bck_io_num = 26  
ws_io_num = 25  
data_out_num = 22  


which are available on many boards such as Lolin D32.