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Author Topic: bitperfect / 24bit processing question  (Read 1249 times)

dvdr

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bitperfect / 24bit processing question
« on: December 21, 2005, 12:40:13 am »

Hi

my goal is to get bit-perfect playback with as few as possible influence on the signal by Mediacenter. Therefor, I am using ASIO-drivers for my firewire-connected RME FireFace AD/DA (capable of 24/192).
I read in the forum, that internally, MC works with 32bit.
I also saw an option in the DSP section "same bitdepth / same sampling rate like the original signal" that you could change to different bitdepths and sampling rates. I left that whole section unchecked to avoid any influence.

- where does that 32bit-processing from MC kick in? Is it used with ASIO-playback from ripped CDs?
- Talking about bitperfect playback with ASIO-drivers: where are (eventually hidden) options, that I need to check/clear to ensure that?
- What are the pro's or con's to use the DSP-option and choose 24bit and/or 88.2 or higher sample rates for ripped CD's - in other words "upsample" the signal?


Thanks!
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Alex B

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Re: bitperfect / 24bit processing question
« Reply #1 on: December 21, 2005, 06:04:43 am »

my goal is to get bit-perfect playback with as few as possible influence on the signal by Mediacenter. Therefor, I am using ASIO-drivers for my firewire-connected RME FireFace AD/DA (capable of 24/192).
I read in the forum, that internally, MC works with 32bit.
I also saw an option in the DSP section "same bitdepth / same sampling rate like the original signal" that you could change to different bitdepths and sampling rates. I left that whole section unchecked to avoid any influence.

- where does that 32bit-processing from MC kick in? Is it used with ASIO-playback from ripped CDs?

The internal digital signal processing is used whenever MC alters the signal somehow.

Quote
- Talking about bitperfect playback with ASIO-drivers: where are (eventually hidden) options, that I need to check/clear to ensure that?

At least these options need to be disabled for bit perfect output: everything in DSP Studio, Internal Volume (maxed out = bit perfect), Cross-fade and Do not play silence (leading and trailing).

Quote
- What are the pro's or con's to use the DSP-option and choose 24bit and/or 88.2 or higher sample rates for ripped CD's - in other words "upsample" the signal?

I have used 24-bit output when any internal DSP is enabled. At least in theory it gives more headroom than 16-bit.

Changing the sample rate does does not increase the audio quality. An exception is if the soundcard always resamples 44.1 kHz to 48 kHz and uses a mediocre HW upsampling. Then 48 kHz should be used.
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