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# slider8f

slider8f -- Creates a bank of 8 different MIDI control message numbers, filtered before output.

## Description

Creates a bank of 8 different MIDI control message numbers, filtered before output.

## Syntax

k1,...,k8 slider8f ichan, ictlnum1, imin1, imax1, init1, ifn1, icutoff1,..., ictlnum8, imin8, imax8, init8, ifn8, icutoff8

## Initialization

ichan -- MIDI channel (1-16)

ictlnum1 ... ictlnum64 -- MIDI control number (0-127)

imin1 ... imin64 -- minimum values for each controller

imax1 ... imax64 -- maximum values for each controller

init1 ... init64 -- initial value for each controller

ifn1 ... ifn64 -- function table for conversion for each controller

icutoff1 ... icutoff64 -- low-pass filter cutoff frequency for each controller

## Performance

k1 ... k64 -- output values

slider8f is a bank of MIDI controllers, useful when using MIDI mixer such as Kawai MM-16 or others for changing whatever sound parameter in real-time. The raw MIDI control messages at the input port are converted to agree with iminN and imaxN, and an initial value can be set. Also, an optional non-interpolated function table with a custom translation curve is allowed, useful for enabling exponential response curves.

When no function table translation is required, set the ifnN value to 0, else set ifnN to a valid function table number. When table translation is enabled (i.e. setting ifnN value to a non-zero number referring to an already allocated function table), initN value should be set equal to iminN or imaxN value, else the initial output value will not be the same as specified in initN argument.

slider8f allows a bank of 8 different MIDI control message numbers. It filters the signal before output. This eliminates discontinuities due to the low resolution of the MIDI (7 bit). The cutoff frequency can be set separately for each controller (suggested range: .1 to 5 Hz).

As the input and output arguments are many, you can split the line using '\' (backslash) character (new in 3.47 version) to improve the readability. Using these opcodes is considerably more efficient than using the separate ones (ctrl7 and tonek) when more controllers are required.

| slider8f opcodes do not output the required initial value immediately, but only after some k-cycles because the filter slightly delays the output.

## See Also

s16b14, s32b14, slider16, slider16f, slider32, slider32f, slider64, slider64f, slider8

## Credits

Author: Gabriel Maldonado
Italy
December 1998

New in Csound version 3.50

Thanks goes to Rasmus Ekman for pointing out the correct MIDI channel and controller number ranges.

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