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From: Rafal Maszkowski <>
Subject: Re: Dynamically modify sox effects?
Date: Wed, 13 Feb 2019 15:23:13 +0100
Message-ID: <> (raw)
In-Reply-To: <20190213080802.uzjvb2zouxjzdtda@dcvr>

On Wed, Feb 13, 2019 at 08:08:02AM +0000, Eric Wong wrote:
> Robi Pires <> wrote:
> > Hello, is there a way I can dynamically modify sox effects while sox is
> > running? I want to have a way to add effects to my voice (pitch
> > modulation/reverb/etc.) and pipe that to OBS and Mumble. Is there another
> > application that does this?
> Not natively in sox.  I use separate processes for
> decoding/effects/playback and manage the command pipelines and
> sox processes.

Since several years I use a solution which should be finally ported to
the recent SoX version as a separate program but I lack time to do it.
My current solution is a patch to run SoX full screen, interactively,
with ability to modify speed and volume and jump through the recording
easily with simple key-strokes. Other interactive modifications could be
added easily in the code. Not many formats are seekable in this version,
I use WAV.

How the window with my interactive SoX looks like:

        sox Version 12.17.9, interactive sox v. 20070202rzm
`1234567890-=<- speeds 0.5 - 3.2              f v             gain +-0.5 dB
up down         speed +-0.1 times             p[ause]
'               prev speed                    ^L              redraw
<- { [ ] } ->   back/forw by 1, 4, 30 s       t[ag begin] T[ag end]
b[egin] e[nd]   of file                       < >             prev/next tag
B[egin] q[uit]  prev/next file                d[elete tag]    up to 5 s ago
Q[uit]          full stop                     D[elete tag]    last before cursor

Time      0:27:08  45.2%        total:   1:00:01                      file time:   2:27:09
Speed:   3.0    Gain:   -18.0 dB                                      delay:    3 19:49:17
rm20070218020001.wav -> /dev/dsp


Instruction and source:
interactive_sox.README                  description
sox.20050917.tar.bz2                    original sources from CVS
sox.20050917.rzm-2014-05-07-all.diff    all current interative sox patches until the date specified; includes b-e tags time diff printing
sox.20050917-inst8-9.diff               lowered optimization fixes a crash, Dec 2014

„Walczy on z całym zapamiętaniem przeciwko intelektowi” - z akt personalnych prof. A. Baeumlera

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Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-02-05 18:49 Robi Pires
2019-02-13  8:08 ` Eric Wong
2019-02-13 14:23   ` Rafal Maszkowski [this message]
2019-02-13 22:30   ` Peter P.

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