Make karaoke version of opus

Download and install the latest version of Filestar.
Right click on one or more Opus file(s) on your desktop and select Convert with Filestar.
Type make karaoke version of in the search box.
Press Run.

What is .opus?

Name: Opus Audio File
Extension: .opus
Format: Binary
Category: Audio
Developer: Xiph.Org
Description: An OPUS file is an audio file created in the Opus format (also called "Ogg Opus"), a lossy audio format developed for Internet streaming. It uses both SILK (used by Skype) and CELT (from Xiph.Org) codecs and supports variable bit rates from 6 kb/s to 510 kb/s.
MIME Type: audio/opus
Sample: sample.opus
Wikipedia: .opus on Wikipedia