[opus] 48kHz

Simon Brown simon at sdr-radio.com
Sun Dec 15 04:37:48 PST 2013


I use Opus for compressing audio with low latency and high quality for a
client / server program which runs on Windows from XP SP3 upwards, from the
lowliest ATOM processor to the biggest Haswell CPU.

I have not had any issues as all with this solution, the 48kHz *can* be
provided by Windows on a Core2Duo without any problem, in fact the Core2Duo
is a very fine chip indeed.

I think your friend is either a bit confused or hasn't provided full
information about his hardware setup.

Simon Brown (G4ELI/HB9DRV)

-----Original Message-----
From: opus-bounces at xiph.org [mailto:opus-bounces at xiph.org] On Behalf Of
Carsten Mattner
Sent: 15 December 2013 13:23
To: opus at xiph.org
Subject: [opus] 48kHz

I have been challenged by someone that opusfile's 48kHz most of the time
forced resampling but I didn't have good arguments to counter.

I've checked the opus-codec.org pages and Monty's pages without finding good

If you encode files to .opus with opusenc and decode with opusfile's api the
sampling rate is constantly 48kHz ignoring output hardware isn't it?

Is current and old (2007 Intel core2duo chip) onboard chipset audio not
capable of 48kHz?

Using libopus directly it's possible to use lower sampling rates but this
cannot be decoded with libopusfile can it?

These may be noob questions but I hope you can provide simple answers to
counter the next time someone questions my use of opus.
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