H910 Harmonizer

To get the lowdown on the H910 modeling process, we spoke to Eventide DSP engineer Dan Gillespie, who spearheaded the H910 plug-in project. As Eventide’s first pitch-shifter...it’s an effect that has made its mark on a variety of records and genres.

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The H910 and H910 Dual feature hundreds of presets and include a number of artist presets.

• Chris Carter (Throbbing Gristle)
• Robin Finck (Nine Inch Nails)
• The Butcher Bros. (John Lennon, Bob Dylan)
• Joe Chiccarelli (Morissey, Frank Zappa)
• Roy Hendrickson (Miles Davis, Frannk Sinatra)
• Sasha (Madonna, Hot Chip)

Explore the Presets

Audio Clips: Robin Finck 

Robin Finck is a guitar virtuoso most commonly known for his time in the bands Nine Inch Nails and Guns N' Roses. Finck uses the guitar to be able to achieve a plethora of new sounds which made his songwriting unique and fascinating.

Gear used/signal chain: Fano ML6 | Seymour Duncan Antiquity PAFs | JHS Kilt | AMT Legend Amps O2 | dbx 386 Tube Preamp | Apogee Quartet | LOGIC Pro X | Torpedo WOSlll | Waves CLA-2A | Eventide H910

The original H910’s unique pitch change method introduced random ‘glitches’ into the audio and the word ‘glitch’ into the audio engineer’s vocabulary. Not surprisingly, artists found creative ways to use the glitch and, in fact, years later when the H949 was introduced with advanced de-glitching circuitry, some users were disappointed that the glitch was gone. In addition to the glitch, all of the quirkiness of the original H910 has been emulated. The design predates the introduction of the CD and digital audio sample rate standards (e.g. 44.1 kHz) by nearly a decade. The system clocks at the heart of the design drifted and wobbled introducing a degree of randomness in the effect not found in later crystal-based, precise digital devices. This was evident in the way that the display would flicker between pitch ratio readings. The combination of glitch, randomness and analog signal path, especially when the feedback control was turned up, added an ‘organic’ feel to the sound and that feeling comes through in the plug-in.

Eventide has painstakingly modeled every section of the analog signal chain to recreate the sounds of the original H910.The original H910 was a 100% software-free, analog and digital processor that predated the earliest practical ADC or DSP chips by several years. It used simple digital logic gates and some of the earliest RAM memory chips but was, in large measure, an analog beast. A custom analog-to-digital converter, companding, filtering and analog feedback combined to give the unit a distinctive sound which this plug-in faithfully re-creates. 

In 2007, the H910 was inducted in the TECnology Hall of Fame. The list of famed producers, audio engineers and musicians that still use it to this day—either in hardware or plug-in form—is a veritable “who’s who” of the recording industry. Thicken drums, create vocal harmonies and make your guitars fill up the track with the best of them. Just ask Tony Visconti (David Bowie, Thin Lizzy, ), Shelly Yakus (John Lennon, U2, Madonna), Tom Lord-Alge (Avril Lavigne, Blink 182, Santana), Tony Platt (AC/DC, Cheap Trick, Bob Marley), Laurie Anderson and Eddie Van Halen, to name a few. Once you have the H910 in your arsenal, you’ll wonder how you ever lived without it.