# SC-808 Open Hi-Hat

amp: | 1 | pan: | 0 | hpf: | 118.551 | lpf: | 107.213
decay: | 0.5 | decay_curve: | -3

``

    use_synth :sc808_open_hihat

Open hi-hat of the SC808 drum machine based on Yoshinosuke Horiuchi’s implementation of the legendary rhythm composer from the early 80s. This is a percussive synth, so it does not use the standard envelope parameters, neither does it feature slideable parameters. Note that this synth is rather faint and may require an amp of 2 or more to be heard.

Introduced in v4.5

## Options

amp: | The amplitude of the sound. Typically a value between 0 and 1. Higher amplitudes may be used, but won’t make the sound louder, they will just reduce the quality of all the sounds currently being played (due to compression.) Default: 1 Must be zero or greater May be changed whilst playing Has slide options to shape changes
pan: | Position of sound in stereo. With headphones on, this means how much of the sound is in the left ear, and how much is in the right ear. With a value of -1, the sound is completely in the left ear, a value of 0 puts the sound equally in both ears and a value of 1 puts the sound in the right ear. Values in between -1 and 1 move the sound accordingly. Default: 0 Must be a value between -1 and 1 inclusively May be changed whilst playing Has slide options to shape changes
hpf: | High pass filter cutoff value for the rimshot. A MIDI note representing the lowest frequencies allowed to be present in the sound. A high value like 100 makes the sound thin and whispy, a low value like 40 removes just the lower bass components of the sound. Default: 118.551 Must be zero or greater, must be a value less than 131 May be changed whilst playing Has slide options to shape changes
lpf: | Low pass filter cutoff value for the hi-hat. A MIDI note representing the highest frequencies allowed to be present in the sound. A low value like 30 makes the sound round and dull, a high value like 100 makes the sound buzzy and crispy. Default: 107.213 Must be zero or greater, must be a value less than 131 May be changed whilst playing Has slide options to shape changes
decay: | Decay of the hi-hat in seconds, for shorter and longer sounds. Values beyond 1 may not really sound like a hi-hat, but interesting anyway. Default: 0.5 Must be zero or greater Can not be changed once set
decay_curve: | Curve value for the decay of the hi-hat Default: -3 Can not be changed once set

## Slide Options

Any parameter that is slidable has three additional options named _slide, _slide_curve, and _slide_shape. For example, 'amp' is slidable, so you can also set amp_slide, amp_slide_curve, and amp_slide_shape with the following effects:

_slide: | Amount of time (in beats) for the parameter value to change. A long parameter_slide value means that the parameter takes a long time to slide from the previous value to the new value. A parameter_slide of 0 means that the parameter instantly changes to the new value. Default: 0
_slide_shape: | Shape of curve. 0: step, 1: linear, 3: sine, 4: welch, 5: custom (use *_slide_curve: opt e.g. amp_slide_curve:), 6: squared, 7: cubed. Default: 5
_slide_curve: | Shape of the slide curve (only honoured if slide shape is 5). 0 means linear and positive and negative numbers curve the segment up and down respectively. Default: 0