You should be able to attach a file simply by drag dropping it into your reply. If you get the message that the file type is not supported you can zip it first.
I was able to build the soundforge project and run it on a Thingy52 (which comes with a built in speaker). I notice that there is a bit of noise when the sound is being played. Does this sound similar to the noise you are experiencing?
It is definitely possible to connect a DAC to the nRF52 over I2S, and this will give you much better sound quality compared to using the PWM. I will take a look next week if I can find a good example for this.
Thanks for the help, my sound file is not similar to this one, here we can hear sample 3 with noise but I am only getting noise but now I am changing output from PWM to DAC using I2C so looking for their examples
