From: Vaughan Johnson <vaughan@au...> - 2013-11-06 23:23:37
There's a thread on Forum
r8brain vs sox, and somebody posted to feedback@ with follow-up.
I mentioned it to Rob and he looked into it. Results below.
-------- Original Message --------
Subject: Re: Fwd: Re: Audacity Team - r8brain sample rate converter is
now open source!
Date: Sun, 3 Nov 2013 14:12:11 +0000 (GMT)
From: Rob Sykes <aquegg@...>
Reply-To: Rob Sykes <aquegg@...>
To: Vaughan Johnson <vaughan@...>
> On Saturday, 2 November 2013, 9:04, Rob Sykes <aquegg@...> wrote:
> > Hi Vaughan,
> Thanks -- I hadn't heard he'd open-sourced this.
> Interested, of course, I downloaded the source, only to find there's no
> Makefile or project file, and just one example.cpp, which by it's own
> admission, won't compile! So, evaluation on hold.
Okay, I was still curious, and hacked about the r8brain example and got
it to run; here are the results.
The new library is markedly different to and faster than the free
downloadable windows exe of r8brain. The latter was built in 2005 and
performs about as fast as libsamplerate (i.e 20-30 times slower than
The r8brain library now uses some of the techniques used in sox -- in
particular FFT oversampling. The quality is comparable to libsoxr, but
it's still slower. The results (with execution times shown at the
bottom) can be seen