hello! why this works?

cd /home/user
cat * | ecasound -i stdin -o jack

cd /home/user/somedirectory
cat * | ecasound -i stdin -o jack

Unless you define what "doesn't work" means, it's possible that no one can help you.

cat * will exapnd to cat file1 file2... file1, file2 etc files being in the current directory. So chances are there that the "somedirectory" is empty!

--ahamed

We appear to have a different understanding of the meaning of

i mean first example "cat's" files in my home directory to my soundcard and makes noise but second example throws error
cat: invalid option -- ' '
so how to use subfolder in home directory and cat all files from that directory to | ecasound -i stdin -o jack?

Oops... I missed that part!...

--ahamed

Perhaps you have a file name '-- '?

$ touch -- '-- '
$ cat *
cat: unrecognized option `-- '
Try `cat --help' for more information.