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The Filters and their Controls
Filters are second only to oscillators in defining the sound of a patch. If the oscillators were
passengers in a car, for example, then the filters are the doors: Some open and close luxuriously
to reveal the occupants; others have more grit and meet a different need. The Hydrasynth
Deluxe filters cover the range from a silky Lamborghini to a rugged Jeep, with all the sophistica-
tion and aggression implied by those extremes. You’re ready for any sort of musical journey
with Hydrasynth Deluxe.
There are two filters available, each with its own characteristics. They can be used in series, with
Filter 1 feeding Filter 2, or used in parallel, where each filter has a direct path to the output.
Filter 1
This filter is actually a collection of filter types. Each one has its own character, and some may be
similar to analog filters you have encountered. But we didn’t want Hydrasynth Deluxe to sound
like a clone of any instrument, so we took some of the flavor of the original filters and made
something new. As with the oscillators, you will find that the Hydrasynth Deluxe filters add their
own signature to the sound.
Filter 1 types
Name
Description
Name
Description
LP Ldr12 12dB Uncompensated Ladder filter HP 3-Ler The High Pass flavor of a boutique
modular synth
LP Ldr24 24dB Uncompensated Ladder filter
LP Fat12 12dB Compensated Ladder filter
LP Stn12 Our version of a popular 12dB Low
Pass filter
LP Fat24 24dB Compensated Ladder filter
LP Gate
Low Pass Gate filter
BP Stn12 Our version of a popular 12dB Band
Pass filter with dual 6dB slopes
LP MS20 Low Pass filter with an MS-20 flair
HP MS20 High Pass filter with an MS-20 flair
HP Stn12 Our version of a popular 12dB High
Pass filter
LP 3-Ler The Low Pass flavor of a boutique
modular synth
LP 1 Pole A gentle 6dB Low Pass filter
BP 3-Ler The Band Pass flavor of a boutique
modular synth
LP 8 Pole A steep 48dB Low Pass filter
Vowel
Vocal formant filter
Compensated vs. Uncompensated filters
Filter compensation could be an unfamiliar concept. It’s another way in which ASM has
adapted the sonic profile of various analog synthesizers. Here’s the difference:
• Uncompensated filters: As resonance increases the low frequency content of the sound
is reduced.
• Compensated filters: The bass response is
not
reduced as resonance is increased.
Filter 1 parameters: page 1
All of the Filter 1 types have the same parameters, with one exception as noted. Access [FILTER 1]
and turn Control knob 1 to select the Type, then adjust these parameters as needed: