It features all the original functions and controls (minus CV mode) and adds an envelope follower mode, keyboard (MIDI) based pitch shifting and a second audio output path. "H910" is the classic hardware with some extra improvements. It’s important to note that Eventide has developed two H910 plugins: one is the H910, which is an almost 1:1 replica of the original hardware, and second is the H910 “Dual”, which is here to facilitate a very common use of these Harmonizers as a stereo effect. That’s all replicated in the plug-in, its inherent instability was reproduced and the resulting sound is noticeably gritty. In fact, all of the oscillators in the H910 are of the ‘free-running’ sort and this randomness adds to the sound (and the fun)." The result is that the system was not locked to a specific frequency and the entire system’s clocking would drift slightly, slowly and unpredictably. The H910’s master clock wasn’t crystal-based but, instead, it was a tuned LC (inductor/capacitor) oscillator. And that flickering readout belied a secret – the H910 was inherently ‘jittery’. In a time long before CDs, MIDI, or any standards for sample rate or bits, Light Emitting Diodes (LEDs) had just become “the latest, greatest thing” and the H910’s iconic, flickering display was the first ‘digital readout’ to appear in many studios. The H910 was also just a tiny bit unstable. Everything else - filtering, feedback, mixing, pitch modulation, etc. The digital bits of the design did “as little as necessary.” Only delay was digital. "The H910’s electronics were primitive and the processing almost entirely analog. Speaking of which, I’d like to highlight this quote from page 03, which explains the H910 spirit and behaviour:
SPECIALS ON EVENTIDE H910 INSTALL
Once again, this is an extremely simplistic way of explaining it and I’m certainly leaving out a ton of relevant information, by all means install the demo and while you’re playing with it please take a moment to open the user manual - it’s conveniently opened from the plugin itself through the “i” button next to the preset manager.
Last but not least, there’s the anti-feedback knob which is engaged when the corresponding button is pressed, and adds some frequency shifts to the output signal and with extreme settings can do some FM-esque modulations. The numerical display at the center of the interface shows the pitch ratio - please check the attachment for the table of pitch ratios and their musical relationships (taken from page 07 the user manual). “Manual” only works with its corresponding button pressed or under envelope mode. Now we arrive at right portion of the interface, which houses the pitch shifting - choose the operating mode (manual, keyboard, envelope or anti-feedback) then proceed to tweak the “Manual” knob to apply the pitch shift, turn it to the left we lower the pitch and to the right to increase it.
The delay’s feedback is controlled by the knob right next to the input signal and the delay signal can be isolated by the “delay only” button in case the user doesn’t want the pitch shifting to happen. Then we move on to delay setting, which is controlled by four combinable buttons (7.5, 15, 30 and 60 milliseconds) with up to 112.5 mS. It’s apparently simple and straight-forward, but just apparently - it’s quite an intricate beast! Having said that, it all starts on the left side with the input level, which isn’t just a plain gain setting as it also affects the unit’s headroom and what happens further down the road - Eventide recommends to crank up this knob until the “limit” LED blinks to maximize the effect, then drop a little to avoid clipping - or just drive it into distortion territory if you’re after such thing. I’ll follow the hardware layout for a brief explanation but first a disclaimer: the controls are obviously intertwined and don’t follow quite the linear logic that I’m about to adopt for this description, so keep that in mind and don’t take this overview as any sort of rule - please read the manual for a thorough comprehension of the signal path. The H910 is a time, pitch and feedback manipulator with apparently primitive controls for today’s standards but immensely powerful when you put it in perspective - so powerful that it remains relevant and still sparks interest in 2016. The scope: The first harmonizer, the one who started it all for digital effects and the piece that launched Eventide to its glorious path back in 1976 when it was introduced.
SPECIALS ON EVENTIDE H910 FOR MAC
Formats: AAX, AU, VST for Mac and Windows.ĭRM: iLok (2 activations, USB key not required)
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