Re: [SoX-users] Does anyone actually use 'v' and 'V' when playing a file?

[Martin G. <mar...@gm...>]

On Wed, 21 Jan 2026 at 21:57, Doug Lee <dg...@dl...> wrote:
> v and V work on a softvol effect on my old Mac; but they are effectively negated if the doubletime is not 0. This seems mathematically sensible but intuitively unexpected.

Thanks, will investigate

> I also find some anomalies with headroom: Depending on multiplier, high headroom values result in sudden sound cutoff as the volume starts ramping up. I see no recovery from this state. (I tried values above 1.0, like 2, 5, etc., to try to cap the volume ramp far enough below max volume that other sounds in my headset could still be heard.)

Sorry, I'm not sure exactly the scenario you mean. with softwol -D?
Can you give a sample command line as an example of this?

> I wonder if v and V should affect headroom

v and V only tweak the hardware mixer settings and don't interact with headroom.

softvol instead doesn't currently support gain -h ... gain -r
as that is always calculated and set when an effect starts.
It never clips itself, but would have to know the quietest prolonged
period of the input file to know how high it could amplify by.

> or if v and V should be able to apply to vol instead of softvol so that the dynamics of softvol won't alter the result.

vol, oddly enough, is another effect that doesn't support headroom.
I would have thought it should, as it's pretty easy to know how much
it amplifies by
unless, of course, its gain is adjusted while it's running by a keymap
as you suggest,
in which case again it wouldn't be able to know at effect startup time.

    M