You can convert text into audible speech just by writing the command
sayfollowed by a string. This is possible thanks to the Speech Synthesis manager on Mac OS.
say stringNaturally, the wide presence of flags for this command allows you to use this command for many different tasks. Notice that using more flag simultaneously, you will be able to solve more complex operations.
Read a particular fileBy writing the command followed by the flag
-fand, instead of the string, by the path of a text file, you will get as output a voice reading the content of that file.
say -f path/text.txt
Specify the reading voiceBy writing the flag
-vfollowed by a person name and a string, you can decide which voice should read the string.
say -v name stringOf course, you're not expected to know every possible voice, so, by writing a string (eg: "Hello world") as argument of the command (including also the flag -v), you will get a list of all the available voices.
say -v "Hello world"
Specify the Speech RateBy writing the flag
-rfollowed by a rate and then by a string, you can decide the reading speed in words per minute.
ay -r rate string
Store the output in an audible fileYou can save the result of the command in an audible file. To do that, you have just to write after the command the flag
-ofollowed by the path/name of the output file and then the string that has to be read.
say -o path/audiofile.*format stringAs said above, you can use more flags in the same command, once you know well them. See the examples below and try to guess the output. You can copy these commands into your terminal to verify your answers. Naturally, you have to create the text files if they don't exist (with some text inside), to make the work.
say -v Alex -f hello_world.txt
say -o hi.aac -f hello_world.txt