I am using Arduino UNO and SD card module with TMRpcm library. I have selected Arduino digital pin 9 as "tmrpcm.speakerPin" because I am using Arduino UNO. Now I want to play multiple audio files (at least) from SD card simultaneously and individually. I have found that I could use Arduino pins 5, 6, 11 or 46 as "tmrpcm.speakerPin" if I use Arduino Mega. My questions are:
Is it possible to use Arduino pins 5, 6, 11 and 46 as "tmrpcm.speakerPin" if I use Arduino Mega to play audio files simultaneously and individually?
Or What kind of hardware or library I need to play multiple audio files simultaneously and individually using Arduino?
I am looking for your help.