Re: sox_ng real-time processing update

Forgot to answer this one.

On Sat, Aug 16, 2025 at 12:02:37PM +0200, Martin Guy wrote:
> On 15/08/25 22:05, Doug Lee wrote:
> > Until today, I've used SoX 14.4.1 for its speed.
> 
> Faster than 14.4.2 ?

Sadly I don't have test results for that, but I do have notes indicating that, a while back, this may well
have been the case.

> > Today, I am starting to use sox_ng 14.6.0 instead.
> >
> > In the older SoX, --buffer 1024 was sufficient for most operations
> > on my machine, and I could even get away with --buffer 768 sometimes.
> > On sox_ng, I need --buffer 3000 at a mimimum, and --buffer 4000 if I use
> > speexdsp
> 
> What are the symptoms that these bigger buffers relieve?
> Interruptions in the heard audio?

I call it stuttering - pretty fast stuttering at that. One friend who tested this did not experience this
though, much to my delight.

> The buffer-related commits in sox_ng since 14.4.2 are:
> 5e37160 (pre-14.5.0) about pulseaudio buffering (I hope you're not using
> that!)

I am not using pulseaudio; on Windows I use waveaudio only... and I may have forgotten to mention that these
are all Windows SoX/sox_ng builds I've been discussing.

> > I lack the know-how to craft a WSAPI driver for sox_ng;
> 
> I don't even know what a WASAPI driver is but you could file an issue for it.

Right, WASAPI; I missed an A. :) One of a slowly increasing number of Windows sound device interfaces, it
seems; but supposedly the fastest native one - native, I say, because I don't know how it compares to ASIO
which is third-party and about which I know little.


-- 
Doug Lee                 [email protected]                http://www.dlee.org
"If you refuse to be made straight when you are green,
you will not be made straight when you are dry." {African}