FDS-Audio

Cambrone FDS - Audio Mode

Audio Mode will output amplified audio signals that are generated in FreX, CHIamp and any device capable of playing music through headphones. Example: MP3 player, CD and DVD players. The FDS will connect directly to these devices using a 3.5mm stereo male connector (supplied).

In Audio Mode, FreX's volume is used to vary the amplitude (power) of the signal.

The FDS Power dial is NOT used in Audio Mode. The ERS software requires control of the audio signals amplitude. This will also allow FreX to modify the sine wave and produce an experimental resonating signal at any audio frequency. Here we plan to use formulas we have discovered that exist in resonating signals.

Here is 1,000Hz, FreX sine wave at 27 vpp - AC.

Here is 1,000Hz, FreX square wave at 30vpp, including the ringing tops of the audio, unconditioned signal. These ringing tops and bottoms of the audio square wave signal are similar to the initiation of a resonating signal, and may explain why results have been experienced with this signal when used via some transmitters. Of all the audio signals generated, this square wave has produced a powerful body feeling.

These ringing tops of raw audio square waves closely resemble the beginning of a resonance event. Resonance can be heard in the ringing of a bell.

1,000Hz signal, FreX Triangle wave, 28vpp.

1,000Hz signal, FreX Sawtooth wave, 30vpp.

By turning up the volume in FreX, a sine wave hits the top of the +/- 15 volt power rail and the signal will start to square out, producing harmonic signals. This is to be avoided when wishing to use sine waves. FreX's oscilloscope and spectrum clearly display this signal change and you can adjust the volume down to avoid it.

FreX's oscilloscope and spectrum display the sine wave square tops. As you can see, the square top slants in the oscilloscope. This is a product of a capacitor on the input of all microphone connectors to protect the audio electronics from DC signals which could harm them.

For our purposes, we are able to identify this function, and adjust the volume to avoid sine waves hitting the ceiling. Notice the start of harmonics in the spectrum, which indicates the sine wave is no longer a sine wave.

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