Convert gsrt to paf

Download and install the latest version of Filestar.
Right click on one or more Gsrt file(s) on your desktop and select Convert with Filestar.
Type convert to paf in the search box.
Press Convert.

What is the difference between .gsrt and .paf?

Name: Grandstream ring-tone File; PARIS Audio File
Extension: .gsrt; .paf
Format: Binary; Binary
Category: Audio; Audio
Developer: Grandstream; Ircam.
Description: Grandstream ring-tone files. Whilst this file format can contain A-Law, μ-law, GSM, G.722, G.723, G.726, G.728, or iLBC encoded audio, SoX supports reading and writing only A-Law and μ-law.; Ensoniq PARIS file format (big-endian).
MIME Type: audio/x-gsrt; audio/x-paf
Sample: sample.paf