6 Royalty-Free Audio Tracks for "Multi Tone"

911 dtmf dialing sound.

Dtmf tone with wah wah lfo.

Dual tone multi-frequency (dtmf) dialing 1-2-3-a-4-5-6-b-7-8-9-c-*-0-#-d in this order. Made with audacity.

Dl0ksc in cw qso of mar 10th, 2012, at 11. 50 utc on 10116 khz. Stable high frequency but multiple tone - spectrum. Audio frequency changes are due to my tuning of trx to hear multiple tone.

This is the sound of an eerie wind passing through the cracks and crevices of a multi-level parking garage.

This is the sound of an eerie wind passing through the cracks and crevices of a multi-level parking garage.