# Sound Out Stereo

amp: | 1 | mix: | 1 | pre_mix: | 1 | pre_amp: | 1
output: | 1 | mode: | 0

``

    with_fx :sound_out_stereo do
      play 50
    end

Outputs a two-channel stereo signal to two consecutive soundcard outputs of your choice. By default will route the left and right channels of the incoming stereo signal (generated within the FX block) into separate left and right output channels. However, with the `mode:` opt, it is possible to alternatively cross over the channels or mix the incoming stereo channels into a single mono output and duplicate that on both left and right output channels.

Introduced in v3.0

## 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
mix: | The amount (percentage) of FX present in the resulting sound represented as a value between 0 and 1. For example, a mix of 0 means that only the original sound is heard, a mix of 1 means that only the FX is heard (typically the default) and a mix of 0.5 means that half the original and half of the FX is heard. Default: 1 Must be a value between 0 and 1 inclusively May be changed whilst playing Has slide options to shape changes
pre_mix: | The amount (percentage) of the original signal that is fed into the internal FX system as a value between 0 and 1. With a pre_mix: of 0 the FX is completely bypassed unlike a mix: of 0 where the internal FX is still being fed the original signal but the output of the FX is ignored. The difference between the two is subtle but important and is evident when the FX has a residual component such as echo or reverb. When switching mix: from 0 to 1, the residual component of the FX’s output from previous audio is present in the output signal. With pre_mix: there is no residual component of the previous audio in the output signal. Default: 1 Must be zero or greater May be changed whilst playing Has slide options to shape changes
pre_amp: | Amplification applied to the input signal immediately before it is passed to the FX. Default: 1 Must be zero or greater May be changed whilst playing Has slide options to shape changes
output: | First of two consecutive sound card outputs to send audio to. Indexing starts at 1 and two outputs are used. Therefore an output of 2 will send audio to both outputs 2 and 3 Default: 1 May be changed whilst playing
mode: | Output mixing mode. Mode 0 is standard - left audio on the first channel, right on the second. Mode 1 is inverse - right audio on the first channel, left on the second. Mode 2 is mono - a mixed mono version of both channels is sent to both audio outputs. Default: 0 May be changed whilst playing

## 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