I recently got a friend to record short audio of every signal from his 864 I extended the audio and took the stereo dual tone and converted it to mono single and dual tone
Here is the YouTube video (the compression had fun)
https://youtu.be/THhSZqifenY
Here is the Google drive link to the audio
https://drive.google.com/drive/folders/ ... RJDqWfsaBt
I’ve now completed my electronic siren toneset library! Check it out!
https://drive.google.com/drive/folders/ ... 8w98R0HCes