Author Topic: Upsampling or downsampling ?  (Read 121 times)

Offline ddetaey

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Upsampling or downsampling ?
« on: November 26, 2018, 03:02:43 PM »
As I am playing all my music upsampled in realtime to DSD256/512, I sometimes experience problems with my DAC('s) with files that are 48kHz multiples (48kHz, 9§KHz, 192kHz) as DSD256x48 & DSD512x48 are not supported.
I have bought XiSRC to be able to do offline conversion.

Playing around with all possible conversions, I wonder which conversions you would recommend, keeping in mind that, although storage is cheap, there are still reallife limits.

I consider therefore 2 main paths for offline conversion :

1) either upsample 48kHz multiple files to 44kHz multiples.
Question is then : am I lossing quality/or introducing problems if I downsample (e.g. 48kHz to 44kHz, 96kHz to 88,2kHz) or should I always upsample : i.e. 48kHz to 88,2kHz, 96kHz to 176,4kHz,...)

2) convert to DSD64

Looking forward to your comments and advice

Dirk

Offline Xi_Stephan

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Re: Upsampling or downsampling ?
« Reply #1 on: December 05, 2018, 07:41:48 AM »
If I understand you correctly then you want to convert 48kHz PCM to DSD64.
For that case just choose the direct route in XiSRC.
As soon as the sample rate base is changed, in this case 48kHz to 44.1kHz, you would normally loose quality, but XiSRC uses an approach to minimize any losses. Nevertheless, the drawback is a longer conversion time because the approach is really computationally intensive.