Download of MacPAG 1.2 for Mac was on the developer's website when we last checked. We cannot confirm if there is a free download of this app available. The software is included in Audio & Video Tools. Please check the Mac app with an antivirus before launch as it is downloaded from the developer's website, and we cannot ensure that it is safe.
From the developer:
MacPAG - Programmable Audio Generator - is a program for creating audio files containing a series of tones.
PAG is useful for creating files of test tones, for testing audio software, or equipment. Let's say you wanted to make a file of DTMF (Touch Tone) tones to test out some equipment. You can use PAG to generate such a file.
PAG reads in a text file to define what audio to produce.