Skip to content
Everything In Music Since 1958
Everything In Music Since 1958

ASM Hydrasynth 49-key Polyphonic Wave Morphing Synthesizer

by asm
Original price $1,499.00
Original price $1,499.00 - Original price $1,499.00
Original price $1,499.00
Current price $1,299.00
$1,299.00 - $1,299.00
Current price $1,299.00
► New - ♫ In stock
Condition: New
About Inventory Status

Call or text us at 301-946-8808.

In stock: It is in stock and available to ship or pickup. Apparel must be shipped from another location and is not available for in-store pickup. We can usually ship or have these items available for pickup by the next business day if they don't require inspection, special handling, or setup. Our pickup location is 11151 Veirs Mill Rd. Silver Spring, MD 20902.

📆 Preorder: It is on the way to our warehouse. We can't predict when preorder items will arrive due to current supply chain issues. If you place an order for one of these items someone will contact you to estimate the delivery date.

Out of stock: We don't currently have it available but you're not out of luck yet. We still may be able to get it. If you order one of these items we will contact you with an estimated fulfillment date. You have the option to cancel the order if you change your mind.

Special order: The item is so special that it needs to be custom ordered for you. Some of these items are works of art and have to be made individually. Orders for special order items must be prepaid and we cannot accept cancellations or refunds.

█ Sold out: We don't think we can get this item because it was either discontinued by the manufacturer or was limited in quantity. If you want or need this item call or text us. Sometimes we can help you track down the item through other sources or help you find something similar.

About Item Conditions

Call or text us at 301-946-8808.

New: The item is brand new as received from the manufacturer with a full manufacturer warranty. Instruments such as guitars, snare drums, drum kits, brass and woodwind instruments may be opened for photography and quality control inspection and may not be in a factory sealed box.

Mint or Open Box: The item may have been opened and tested but has been repackaged. The original packaging may have superficial issues but the item itself and any originally included accessories are in perfect, like new condition.

Display Model: These items are so cool that we put them on display in our legendary shop. The condition is brand new as received from the manufacturer with manufacturer warranty. Rest assured, these items undergo a very careful inspection before shipping.

Demo: These items have been on our sales floor for demo purposes and will likely show signs of use. The original packaging may no longer be included, but you can be assured that you are receiving an awesome item and an awesome price.

Used: The item is used. These item may have varying degrees of wear. Please read the description for information about the condition of the item. Used items do not carry a warranty.

B or C Stock: Factory refurbished. These items were purchased from the manufacturer in a refurbished condition. They will show some cosmetic issues, but nothing that would impact performance. Being that these are sealed from the manufacturer, we generally do not open these to photograph the cosmetic issues. They are guaranteed to work and may have a limited warranty or you may purchase an extended warranty in some cases. Please see the listing description for item specific information.

Educational & Government Sales Quotes

Click here to inquire about an educational or government quote and discover more about our Educational & Government Sales Division.

An Expression Powerhouse For Sound Designers and Musicians Alike - The ASM Hydrasynth 49-Key Digital Polyphonic Wave Morphing Synthesizer

The HYDRASYNTH keyboard is both a sound designer's dream synth as well as a performing musician's ideal. The sound engine is designed for maximum flexibility. At the same time, AMS designed the user interface in a way to allow you to edit the patch quickly with a minimal amount of paging and many workflow shortcuts.

Utilizing an advanced wavetable synthesis engine, 3 Oscillators, dual Wave Mutators, and 2 filters that can be configured in series or parallel, the tone generating capabilities are unmatched. As for the performance capabilities, The HYDRASYNTH keyboard has ASM's proprietary Polytouch keybed that offers polyphonic aftertouch over each note, giving you the type of expressive control found only in certain vintage synths. Add to this a 4-octave ribbon controller and ergonomically designed pitch and mod wheels and you have expression and control that is not equaled in any other hardware synthesizer on the market-- today or ever.


Sound Path

  • 8 Voice Advanced Wavetable synthesis
  • 2 Wavemorphing Oscillators
    • 219 single cycle waveforms
    • User wavetables - 8 user-selectable per osc to build user wavetables
    • Every osc and patch can have its own user wavetable
    • WaveScan parameter for modulating through wavetables.
    • +/- 3 octave tuning range
  • 1 fixed Wave OSC
    • 219 single cycle waveforms
    • +/- 3 octave tuning range
    • Keytracking 0-200%
  • Dual Mutators per oscillator
    • FM: Linear FM, Selectable Modulator source, Built-in Sine and Triangle, OSC1, OSC2, OSC3, Mutators A, B, C, D, Noise gen, Ring Mod, External Mod 1 and 2 input.
    • WaveStack: Generates 5 detuned waves from input source. Detune amount.
    • Pulse Width Mod: Adjust pulse width of ALL waveforms.
    • PWSqueeze: Compresses the center section of the waveform. Different type of PWM
    • PW-ASM: 8 User adjustable wave squeeze/stretch points.
    • Hard Sync: Gives that classic sync sweep sound. Selectable Sync input source.
    • Harmonic Sweep will scan through the harmonics of the incoming sound.
    • Dry/Wet mix to blend the original OSC source.
  • Noise Generator
    • White, Pink, Brown noise sources
  • Ring modulator
    • Selectable input sources - OSC1, OSC2, OSC3, Noise, All Mutator outputs, External Mod in.
    • Depth control
  • Sound source mixer
    • Mix the following sources - OSC1, OSC2, OSC3, Noise, and Ring Mod.
    • Panning for each source
    • Filter routing mix
    • Solos for each source (solo status is saved in the patch)
  • Two Filters, Series or parallel routing
  • Filter 1
    • 12 and 24db modern ladder (compensated)
    • 12 and 24db vintage ladder (uncompensated)
    • Threeler HP, LP
    • MS20 HP, LP
    • Low Pass Gate
    • Vocal filter
    • Multiple vowel order parameter
    • Formant parameter
  • Filter 2 - Continuously Variable Lowpass-Band pass-High pass (Oberheim SEM style)

Modulation Specifications

  • 5x Low-Frequency Oscillators
    • 10 static waves - Sine, triangle, Square, Saw up, Saw down, S and H, Low random, Noise, Pulse width 25%, Pulse Width 12.5%.
    • Step Wave: 8 steps that the user can set (like a step sequencer), Step smoothing, Step glide
    • Clock sync
    • Starting phase
    • Start delay
    • Fade in
    • Master output gain
    • Trigger modes: mono, poly, free, one shot mode
  • 5x Envelope Generators
    • 6 stage DAHDSR envelopes - Delay, Attack, Hold, Decay, Sustain, Release
    • Slope curves for ADR stages - Variable from full exponential to full logarithmic
    • Tempo or Time option for setting length of each stage.
    • Looping of AHD stages for creating LFO types of modulations.
    • Trigger modes: Legato, Reset, Retrigger
  • Matrix modulation
    • 32 slots for source-destination mod routings with amount
    • Modulation matrix slots can be mod destinations
    • 8x Macro knobs and buttons - Each macro knobs allows positive and negative of up to 8 destination controls
  • Arpeggiator
    • Arp parameters can be modulation destinations.
    • Modes - Up, down, up/down, Up and down, random, note order, chord, pattern
    • Octave, Range - 1,2,3,4
    • Play order - Up, down, up/down
    • Swing
    • Gate time
    • Ratchet: repeats notes
    • Chance: sets how often the ratchet takes place.

Effect Specifications

  • Pre-effects before Delay and Reverb
    • Chorus, Flanger, Rotary, Phaser, Lo-Fi, Tremolo, EQ, Compressor (with side chain)
  • Delay
    • Tape, Ping-pong, Analog, PitchShift, Reverse, Filter delay
  • Reverb
    • Hall, Room, Plate, Cloud
  • Post-effects after Delay and Reverb
    • Chorus, Flanger, Rotary, Phaser, Lo-Fi, Tremolo, EQ, Compressor (with side chain)

Physical Specifications

  • Metal Chassis - Steel top and bottom, Aluminum side panels
  • PolyTouch Keybed - Polyphonic aftertouch, Velocity
  • 4 octave (67 cm, 26.4”) Ribbon controller
    • Pitch bend mode
    • CC control mode modulation source
    • Theremin mode - triggers envelopes and plays pitch, Continuous pitch or choose from multiple scales
  • 5 banks of 128 patch memories
  • CV gate input and outputs - Supports multiple CV/GATE standards
  • CV
    • 1v per octave +/-5V
    • 1V per octave 0-10V
    • Hz to Volts +/-5V
    • Hz to Volts 0-10V
  • Gates
    • V-trig, S-trig
    • 3V, 5V, 10V
  • Mod In/Out range
    • +/5V, 0-10V, 0-5V, 0-1V
  • Clock in and out
    • 1PPS, 2PPQ, 24PPQ, 48 PPQ
    • Clock Voltage - 3v, 5V, 10V
  • MIDI IN/OUT/THRU - Voice overflow mode for expanding voices with another Hydrasynth
    • Expression pedal input
    • Sustain pedal input
    • Polarity sensing input
  • DC input jack
  • USB port - Supports USB MIDI In/Out
  • Dimensions: 80 x 35 x 10.3 cm (31.5 x 13.78 x 4.05 inches)
  • Weight: 10kg (22.05 lbs)

Manufacturer: asm
SKU: I627850-3-WHXB

We are Chuck Levin's Washington Music Center

Maryland, Virginia, and Washington DC's legendary music shop. Family-owned and operated since 1958. Buy gear the way it was meant to be bought, from a store that's been there through it all and has the vibe to prove it. We're staffed with musicians and industry experts, people that live and breathe music gear. Our mission is to help you find the right gear for your project, that thing that will bring you the most joy out of what you do. We're an authorized dealer for almost every brand, we stock items the other stores don't, so you can try before you buy. Stop by our Wheaton, MD showroom and see for yourself.

Contact us if you have questions about one of our listings or if you need help finding the right piece of gear.

Free Shipping

Offered for thousands of items when you spend $100+


+1 (301) 946-8808

Get A Quote

Get an educational or government quote

Easy Returns

Learn about returns.