How to convert mp3 to wav with specific options?

Question

I have created .p12 developer(No password) push cert by exporting Apple development ios push certificate (selected private key also).

I am using firebase push notification, while uploading .p12 file on Firebase its showing ,

I have also created another .p12 with password but getting same error on Google console, Why so?

As of this SO answer which uses only certificate part of .p12-Yes it uploaded successfully but i am not getting push notification from this method. Anyone faced the same?

Solution 1

I'd recommend Audacity. It's a free audio editing program that runs on Windows/Mac/Linux.

From poking around in the formats that you can export, if you save as type Other uncompressed files and select Options, you have the ability to select a WAV file Unsigned 8 bit PCM encoding which I believe is what you were looking for.

Solution 2

mpg123:

mpg123 --wav test.wav --8bit --rate 8000 --mono test.mp3