Mike Hillis said:
If it wasn't a threshold hum then it may have been the result of a continuously sampled audio. Peak Sampled audio cuts off the ends of the signal and passes through the peak. You just hear the beep. Kind of looking at a normal histogram with both ends cut off. A continuously sampled audio would let you hear the leading edges, the peak, and the trailing edge of the audio. Much like a VCO audio with the addition of tone id.
Can the V3 perform that type of audio id? I believe my V3i does this same type of audio sampling in the prospecting program as I can hear the same ramp up ramp down on target signals.
There is so much to learn about the capabilities of the V3i that it might be years more before we learn all that it be made to do.
HH
Mike.
edited for spelling
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Willy...
The answer to your question regarding whether the White's Spectra can replicate the vaunted Garrett 'audio roll'.......
YES it can, in its own particular style of audio.
It's simply achieved by using MIXED MODE audio...( In this situation, I switch the VCO off, and set the All Metal sensitivity LOWER than the DISC sens.)
I employed this a lot when the DFX was my main unit.
What you then had, was an ALL METAL audio output, which gave a LOW tone on rejected targets [size=x-large]
OR any[/size] targets that were too weak to climb above the discriminating threshold (Which could be a 'good' target).
On any ACCEPTED target that exceded the DISC CHANNEL's threshold, always produced a low tone 'lead-in' to the following high tone, then back into low as that ACCEPTED target was passed over.
In principle, that is comparable to that of the AT PRO. ( i.e. low tone>high tone>low tone.)
But I do not claim that the Whites 'sound' is esthetically comparable ,audio-wise, to the AT PRO.
I've always admired the Garrett 'Bell-tone' audio system
The DFX methodology for Mixed Audio, was, two tones. The higher tone was twice (? or an octave above) the lower tone.)
The actual tonal pitch involved, was based on your choice for the normal Disc audio mode.
If you didn't switch VCO off, then the resulting audio was akin to a poking a pig up the RS with a stick.
It was / is my favourite mode,(Especially on the DFX).