Upsampling Plugin

[adyc]

Is there any plugin for slimserver for upsampling 16/44.1 to 24/96?

[haunyack]

Is there any plugin for slimserver for upsampling 16/44.1 to 24/96?

The Inguz plugin does 16/44.1 -> 24/44.1

.

[seanadams]

The Inguz plugin does 16/44.1 -> 24/44.1

.

That's not upsampling... that's not anything.

[haunyack]

That's not upsampling... that's not anything.

sean
Let me revise ...
The Inguz plugin does not anything.
My ignorance is showing like a bad suit.

[pfarrell]

haunyack wrote:
> Let me revise ...
> The Inguz plugin does not anything.

It adds bits of zero to the low order. Technically that is something.
Just not something useful or audible.

There is little evidence that even having signal bits out more than 19
or 20 bits per sample is audible.

But then, this is the audiophile forum


--
Pat Farrell
http://www.pfarrell.com/

[seanadams]

The Inguz plugin does not anything.

Well, when it's doing some DSP work then it is doing something, and in that case it is beneficial to have more output resolution because you are changing the signal in some way. But just passing a signal through from a 16 bit pipe into a 24-bit pipe is not doing anything at all to it.

[alekz]

On UNIX you can try sox. A sample entry in convert.conf can look like the following:

flc flc * *
/usr/bin/flac -dcs --force-aiff-format --skip=$START$ --until=$END$ -- $FILE$ | /usr/local/bin/sox -v0.98 --buffer 32768 -V4 -t aif -r44100 -2 -c2 - -t wav -2 -c2 -r96000 - polyphase -cutoff 1.0 stat | /usr/bin/flac -cs --totally-silent --compression-level-0 -

Explanation:

1. convert FLAC to AIFF ( /usr/bin/flac -dcs --force-aiff-format...)

2. upsample from 44.1 to 96 using polyphase filter and convert to WAV ( /usr/local/bin/sox -v0.98 ... )

3. convert WAV to FLAC with no compression ( /usr/bin/flac -cs ... )

I discovered that you have to convert the upsampled stream to FLAC, otherwise my Transporter plays it too slow.

[adyc]

I hope there would be similar plugin like Secret Rabbit Code for Foobar 2000. It would turn slimserver as a free upsampler limited only by the CPU.

[Veggen]

The Inguz plugin does not anything.

Well, when it's doing some DSP work then it is doing something, and in that case it is beneficial to have more output resolution because you are changing the signal in some way. But just passing a signal through from a 16 bit pipe into a 24-bit pipe is not doing anything at all to it.

Actually the Inguz plugin does upsampling of the correction file from 44.1, to 48 or 96 kHz using SoX to match the sampling rate of the currently played file.

Not that this is what you are asking for, but I would think that writing a simple plugin that uses SoX for upsampling should be possible.

[alekz]

Not that this is what you are asking for, but I would think that writing a simple plugin that uses SoX for upsampling should be possible.

Again, the simplest solution is to use convert.conf. See above.