audiophile sound on FreeBSD ?

Ralf Mardorf ralf.mardorf at
Wed Apr 25 06:22:19 UTC 2018

On Wed, 25 Apr 2018 00:21:31 +0100, RW via freebsd-questions wrote:
>On Tue, 24 Apr 2018 20:09:24 +0200 Ralf Mardorf wrote:
>> Btw. an "audio CD" already provides not that good audio quality. What
>> you need for high end audio quality are 48 KHz,  
>I'd be astonished if you could tell the difference under double blind
>conditions - even if you are a child.

I'd be surprised, if most adults with trained hearing would be unable
to perceive a difference.

To keep it short, I'll quote a short and raw explanation:

"> frankly, 48k may be a good enough for distribution, but it is
> sub-optimal not for production ... and it is horrible for digital
> synthesis.

Only if you use 'primitive' algorithms. Unfortunately there's
a lot of those around.

In summary, 96 or 192 kHz will allow you to use simpler algorithms.
That may be a good reason for higher sampler rates, but it doesn't
mean you can't have the same performance at 48 kHz.

Another good reason for higher sampling rates is that the
antialising filters in the converters can have a much wider
transition band (assuming you don't actually use the higher
bandwidth), leading to much reduced latency. It's the reason
why 'digital snakes' used in PA system usually work at 96 kHz.
By starting the transition band at 24 kHz or so they can use
very short filters, a fraction of a millisecond for some.

The same matter makes all the difference between 44.1 and 48 kHz." -

Loosely speaking:

It all depends on the tuning. You could assume that most gear and
software works best at 48 KHz, this is professional audio studio
standard and apart from audio CD, consumer standard, too.

However, depending on your amp, your speakers or any other part of the
audio chain or depending on the recorded signal, such as e.g. an
electric guitar played via a Celestion speaker, you might be even
unable to hear any loss when using DAT longplay (32 KHz, 12 bit

Since the subject is "audiophile sound on FreeBSD" I recommend to go
with a RME audio interface or another professional audio interface. The
OP should ensure that an audio interface that claims to be
"professional" isn't just a "prosumer" audio interface. Without doubts,
48 KHz is the best choice.

When using a professional audio interface, with an elCheapo Hifi amp
and supermarket speakers, you wont be able to hear the good analog
audio quality of your professional audio interface. If you can't hear
the good analog audio quality, you can't notice any issues of different
sample rates.

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