FootSmart

Eventide H9

The Eventide H9 has one quirk that you must work around: there is no MIDI command to change the algorithm.

The workaround is to create a preset for each algorithm, and then switching to that preset will change the algorithm. This, however, has the implication that all parameters must be explicitly set after changing the algorithm (by switching the preset).

This actually makes sense. Even though all algorithms have 10 parameters, they have different meanings in each algorithm: parameter 2 in Chorus is very different from parameter 2 in the Octaver algorithm.

Parameters

Each H9 algorithm has 10 parameters. These have different values depening on the parameter type.

Generic Parameters

• Range 0 to 99: maps to 0 to 127 (CC values). The multiplier is 127/99, or 1.2828... Some sample values:
  • 0: 0
  • 10: 13
  • 20: 26
  • 30: 38
  • 40: 51
  • 50: 64
  • 60: 77
  • 70: 90
  • 80: 102
  • 90: 115
  • 99:127

Spring Reverb Parameters

• Mix: This is the mix. It is non-linear. CC number 0 corresponds to 0 (dry), and CC number 127 corresponds to 100 (wet), but CC number 64 doesn't correspond to 50, it maps to 34.
• Decay: Seconds/note based WIP
• Tension: WIP
• Number of Springs: WIP
• Low Band Damping Frequency: WIP
• High Band Dampling Frequency: WIP
• Tremolo Intensity: WIP
• Tremolo Rate: rate/note based WIP
• Modulation Level: WIP
• Resonance: WIP

Chorus Parameters

• Intensity: Range 0 to 99
• Type:
  • liquid 16
  • organic 48
  • shimmer 80
  • classic 112
• Depth: Range 0 to 99
• Speed: non-linear, I am not sure of the exact mapping. Some values:
  • .1hz: 0
  • .16hz: 16
  • .27hz: 32
  • .44hz: 48
  • .73hz: 64
  • 1.2hz: 80
  • 1.96hz: 96
  • 3.23hz: 112
  • 5hz: 127
• Shape: one of the following:
  • Sine: 0
  • Triangle: 14
  • Peak: 28
  • Random: 42
  • Ramp: 52
  • Square: 66
  • Sample and Hold: 80
  • Envelope: 94
  • ADSR: 108
  • Expr: 126
• Feedback/MDO/Filter: Range 0 to 99
• DMOD: Range 0 to 99
• SMOD: Range 0 to 99
• Rate: non-linear, not sure of exact mappings, some values:
  • .12x: 0
  • .21x: 16
  • .36x: 32
  • .61x: 48
  • 1.03x: 64
  • 1.75x: 80
  • 2.96x: 96
  • 5.02x: 112
  • 8x: 127
• ModSrc: one of the following (same as Shape):
  • Sine: 0
  • Triangle: 14
  • Peak: 28
  • Random: 42
  • Ramp: 52
  • Square: 66
  • Sample and Hold: 80
  • Envelope: 94
  • ASDR: 108
  • Expr: 126