---
name: "jboverdrive"
section: "1"
platform: "linux"
package: "setbfree-standalone"
version: "0.8.17-1"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://new.carta.tech/jboverdrive"
---

# jboverdrive(1)

The B Preamp/Overdrive Emulator

## NAME

jboverdrive - The B Preamp/Overdrive Emulator

## SYNOPSIS

**jboverdrive** \[ *OPTIONS* \]

## DESCRIPTION

jboverdrive - the B Preamp/Overdrive Emulator

Utility to write audio peak data to stdout of file as plain text of JSON data.

## OPTIONS

- **-h**, **--help**

  Print help text

- **-i**, **--input** \<portname\>

  Connect to JACK input port

- **-o**, **--output** \<portname\>

  Connect output to given JACK port

- **-p**, **--parameter** \<key=value\>

  Specify initial effect parameter

- **-V**, **--version**

  Print version information

Effect parameters are all float values 0..1. Available keys and their default values are as follows:

- gainin:

  Input Gain          = 0.3567

- bias:

  Bias                = 0.87399

- feedback:

  Feedback            = 0.5821

- sagtobias:

  Sag to Bias         = 0.1880

- postfeed:

  Postdiff Feedback   = 1.0

- globfeed:

  Global Feedback     = 0.5826

- gainout:

  Output Gain         = 0.07873

## EXAMPLES

jboverdrive **-i** system:capture\_1 **-o** system:playback\_1 **-p** bias=.5 **-p** feedback=0.9

jboverdrive **-i** system:capture\_1 **-o** system:playback\_1 **-O** 1234

oscsend localhost 1234 /boverdrive/bias f 0.9

oscsend localhost 1234 /boverdrive/gainout f 0.3

oscsend localhost 1234 /boverdrive/quit

## REPORTING BUGS

Report bugs to \<robin@gareus.org\>.\
 Website and manual: \<https://github.com/x42/setbfree\>

## COPYRIGHT

Copyright © 2003-2004 Fredrik Kilander \<fk@dsv.su.se\>\
 Copyright © 2012 Robin Gareus \<robin@gareus.org\>

This is free software; see the source for copying conditions.  There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.