I'm trying to output frequencies from audio in to a text file. To do this, I'm planning on having a metro block that triggers the write to a text file.

The problem is that the audio frequency needs to be put into a message as a dollar sign variable, but there seems to be no way to do this that doesn't constantly trigger the message.

Does anyone know how to send such a message only when a bang is received?

The file that I currently have is attached.

http://www.pdpatchrepo.info/hurleur/audio-to-text.pd