sox: add example of changing the volume of a file (#1242)
sox: add example of changing the volume of a file (#1242)


UncommonPleb/tldr,katekyan/tldr,deekim/tldr,cptdeka10/tldr,Phizho/tldr,katekyan/tldr,Phizho/tldr,felixonmars/tldr,slash3b/tldr,deekim/tldr,zoisom/tldr,Phizho/tldr,katekyan/tldr,UncommonPleb/tldr,zoisom/tldr,zoisom/tldr,UncommonPleb/tldr,cptdeka10/tldr,deekim/tldr,cptdeka10/tldr,slash3b/tldr,slash3b/tldr,felixonmars/tldr,felixonmars/tldr