Triode/Pentode/Tape
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HEDD allows you to add tube-like
characteristics to your digital audio with two knobs, specifically pentode
and triode. A separate knob for each tube type is available at the flip
of a switch!
TRIODE
The triode function creates a triode
like harmonic structure. This affects the bottom of your signal by fattening
it up. This function contains strong even order harmonics. It should be
noted that even order harmonics may or may not be easy to hear depending
on the program and how much you are adding. This function is not strictly
even order harmonics. The harmonic structure changes with signal level
and the amount of process being applied, just like it does in a tube and
the analog world.
PENTODE
The pentode function creates mostly
third harmonic information but contains some even order harmonics and
some higher order odd harmonics depending on the signal level and the
amount of process. This is like driving a pentode into over load in a
controlled manner. The pentode process makes things sound brighter, brings
out detail, and also affects the triode process because the two processes
are in series. There is also a compression effect that takes place if
you run the process at higher settings.
TAPE
The tape function emulates magnetic recording tape. Recording tape distortions
are odd harmonic, starting with the third and fifth. As you increase the
level on tape the harmonic content increases and higher odd harmonics
are added. With a tape recorder there are record and reproduce EQ circuits
that modify the harmonic content. The result is a sound that fattens up
the bottom and midrange of a recording and as you increase the process
there is a loss of hi frequencies with respect to low frequencies. This
is a result of the compression function and eq. curves in the process.
The compression also squashes peaks and results in a higher average level.
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Crane
Song, LTD ° Superior, WI ° USA
tel 715-398-3627 ° scott@cranesong.net
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