Eddie Kramer HLS Channel Plug-In User Guide

we were able to model original channels that were in the truck from 1970 – 1973, when the console was
redone by Helios according to specs from engineer Mick McKenna. Our long, arduous search for the
perfect Olympic-style channel reflects the rarity of the original units, and we are truly excited and proud to
present the Helios sound for posterity, and for the creative use of generations to come.
1.3 About the Modeling
Many different elements contribute to
the unique sonic characteristics of
analog gear such as the Helios
mixing console. Waves painstakingly modeled and incorporated these elements into the Kramer HLS
Channel, in order to fully capture and replicate the sound and performance of the original equipment. In
addition to modeling the Helios EQs, we also modeled the unique behavior, coloration, and drive of the
console’s preamps.
These are some of the most important elements of analog
behavior:
•
Total Harmonic Distortion
Perhaps the most important analog behavior is Total Harmonic Distortion or THD, which is
defined as the ratio of the sum of the powers of all harmonic components to the power of the
fundamental frequency. THD is usually caused b
y amplification, and changes signal shape and
content by adding odd and even harmonics of the fundamental frequencies, which can change
the overall tonal balance. THD can also change peak output gain, usually by no more than
+/- 0.2-0.3 dB.
• Transformers
Some hardware uses transformers to stabilize or change Input/Output loads and signal levels. In
earlier days, transformers did not have a flat frequency response, and often introduced low and
super-high frequency roll offs. The original channel has transformers which cause high-frequency
roll off, so if you encounter loss above 10 kHz, this is due to the modeled transformers.
•
Hum
Waves modeled both 50 Hz power current and 60 Hz power current. If you listen closely, you
will hear that there is a difference in hum level between 50 Hz and 60 Hz. Since hum is unique
to each region and dependent upon t
he local electrical conditions, you may find that the
modeled hum is different than the hum already present in your studio, and may not be suitable
for your particular use.
• Noise
All analog equipment generates internal noise or a noise floor. In vintage equipment, the noise
floor is sometimes quite high and colored. Waves modeled the noise to match the level and color
of noise exhibited by the original unit, both with and without signal present.
Waves Kramer HLS
User Guide
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